POTASH CORPORATION OF SASKATCHEWAN INC
10-Q, 1996-11-12
MINING & QUARRYING OF NONMETALLIC MINERALS (NO FUELS)
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<PAGE>   1
 
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
 
                                   FORM 10-Q
                            ------------------------
 
[X]   QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES
      EXCHANGE ACT OF 1934
 
       FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 1996
 
                                       OR
 
[  ]   TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES
       EXCHANGE ACT OF 1934
 
                         COMMISSION FILE NUMBER 1-10351
 
                    POTASH CORPORATION OF SASKATCHEWAN INC.
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
                            ------------------------
 
<TABLE>
<S>                                           <C>
             SASKATCHEWAN, CANADA                                  N/A
       (STATE OR OTHER JURISDICTION OF                       (I.R.S. EMPLOYER
        INCORPORATION OR ORGANIZATION)                     IDENTIFICATION NO.)
            122 - 1ST AVENUE SOUTH
           SASKATOON, SASKATCHEWAN                               S7K 7G3
   (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)                     (ZIP CODE)
</TABLE>
 
                                  306-933-8500
              (REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE)
 
                            ------------------------
 
     Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Sections 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days. Yes X No __
 
                     APPLICABLE ONLY TO CORPORATE ISSUERS:
 
     Indicate the number of shares outstanding of each of the issuer's classes
of common stock, as of the latest practicable date. As at October 31, 1996
45,566,890 Shares.
 
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<PAGE>   2
 
PART I. FINANCIAL INFORMATION
 
ITEM 1. FINANCIAL STATEMENTS
 
     These interim consolidated financial statements do not include all
disclosure normally provided in annual financial statements. In management's
opinion, the unaudited financial information includes all adjustments
(consisting solely of normal recurring adjustments) necessary to present fairly
such information. Interim results are not necessarily indicative of the results
expected for the fiscal year.
 
                    POTASH CORPORATION OF SASKATCHEWAN INC.
 
            CONSOLIDATED STATEMENTS OF INCOME AND RETAINED EARNINGS
                         (IN THOUSANDS OF U.S. DOLLARS)
                                  (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                 THREE MONTHS ENDED          NINE MONTHS ENDED
                                                    SEPTEMBER 30               SEPTEMBER 30
                                                ---------------------     -----------------------
                                                  1996         1995          1996          1995
                                                --------     --------     ----------     --------
<S>                                             <C>          <C>          <C>            <C>
Net sales.....................................  $342,148     $214,609     $1,061,388     $555,033
Cost of goods sold............................   251,193      152,408        766,931      334,362
                                                --------     --------     ----------     --------
Gross Margin..................................    90,955       62,201        294,457      220,671
                                                --------     --------     ----------     --------
Research and development......................       390          320            955          945
Selling and administrative....................    15,142       14,054         43,985       35,498
Provincial mining and other taxes.............     8,596        8,752         29,497       32,625
Other expense (income)........................       409       (2,079)        (7,886)      (6,519)
                                                --------     --------     ----------     --------
                                                  24,537       21,047         66,551       62,549
                                                --------     --------     ----------     --------
Operating Income..............................    66,418       41,154        227,906      158,122
Interest Expense..............................    11,038       13,821         36,784       26,265
                                                --------     --------     ----------     --------
Income Before Income Taxes....................    55,380       27,333        191,122      131,857
Income Taxes..................................     8,608        4,256         28,274        9,561
                                                --------     --------     ----------     --------
Net Income....................................  $ 46,772     $ 23,077        162,848      122,296
                                                ========     ========
Retained Earnings, Beginning of Period........                               277,689      164,037
Dividends.....................................                               (35,816)     (33,997)
                                                                          ----------     --------
Retained Earnings, End of Period..............                            $  404,721     $252,336
                                                                          ==========     ========
Net Income Per Share (Note 3).................  $   1.03     $   0.53     $     3.58     $   2.83
                                                ========     ========     ==========     ========
Dividends Per Share (Note 4)..................  $   0.26     $   0.27     $     0.79     $   0.79
                                                ========     ========     ==========     ========
</TABLE>
 
              (See Notes to the Consolidated Financial Statements)
 
                                        1
<PAGE>   3
 
                    POTASH CORPORATION OF SASKATCHEWAN INC.
 
                 CONSOLIDATED STATEMENTS OF FINANCIAL POSITION
                         (IN THOUSANDS OF U.S. DOLLARS)
 
<TABLE>
<CAPTION>
                                                                                                                               
                                                                     SEPTEMBER 30,     DECEMBER 31,
                                                                         1996              1995
                                                                     -------------     -----------
                                                                     (UNAUDITED)
<S>                                                                  <C>               <C>
                                              ASSETS
Current Assets
  Cash and short-term deposits.....................................    $ 108,534        $   40,497
  Accounts receivable..............................................      175,300           223,377
  Inventories (Note 2).............................................      189,457           221,911
  Prepaid expenses.................................................       13,228            12,041
  Other current assets.............................................        3,987             3,315
                                                                      ----------        ----------
                                                                         490,506           501,141
Property, plant and equipment......................................    1,983,780         2,032,339
Other assets.......................................................       46,212            48,337
                                                                      ----------        ----------
                                                                      $2,520,498        $2,581,817
                                                                      ==========        ==========
                                            LIABILITIES
Current Liabilities
  Accounts payable and accrued charges.............................    $ 150,618        $  199,222
  Current portion of long-term debt................................       88,755           164,971
  Current obligations under capital leases.........................          265               870
                                                                      ----------        ----------
                                                                         239,638           365,063
Long-term debt.....................................................      638,465           711,585
Obligations under capital leases...................................        1,268             2,913
Deferred income tax liability......................................       19,478             4,743
Accrued post-retirement/post-employment benefits...................       96,042            89,570
Accrued reclamation costs..........................................      148,386           151,531
Other non-current liabilities and deferred credits.................        6,060            14,537
                                                                      ----------        ----------
                                                                       1,149,337         1,339,942
                                                                      ----------        ----------
                                       SHAREHOLDERS' EQUITY
Share Capital......................................................      629,954           627,700
Contributed Surplus................................................      336,486           336,486
Retained Earnings..................................................      404,721           277,689
                                                                      ----------        ----------
                                                                       1,371,161         1,241,875
                                                                      ----------        ----------
                                                                      $2,520,498        $2,581,817
                                                                      ==========        ==========
</TABLE>
 
              (See Notes to the Consolidated Financial Statements)
 
                                        2
<PAGE>   4
 
                    POTASH CORPORATION OF SASKATCHEWAN INC.
 
                      CONSOLIDATED STATEMENTS OF CASH FLOW
                         (IN THOUSANDS OF U.S. DOLLARS)
                                  (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                                          NINE MONTHS ENDED
                                                                            SEPTEMBER 30
                                                                       -----------------------
                                                                         1996          1995
                                                                       ---------     ---------
<S>                                                                    <C>           <C>
Operating Activities
Net income...........................................................  $ 162,848     $ 122,296
Items not affecting cash
  Depreciation and amortization......................................     67,242        44,108
  Loss (gain) on disposal of property, plant and equipment...........        786            (7)
  Provision for deferred income taxes................................     14,735         1,576
  Provision for post-retirement/post-employment benefits.............      6,472           762
                                                                       ---------     ---------
                                                                         252,083       168,735
Changes in non-cash operating working capital
  Accounts receivable................................................     48,078       (35,727)
  Inventories........................................................     29,619        (4,705)
  Prepaid expenses...................................................     (1,188)          959
  Other current assets...............................................       (672)        7,579
  Accounts payable and accrued charges...............................    (48,604)       18,193
Accrued reclamation costs............................................     (3,147)       (1,448)
Other non-current liabilities and deferred credits...................     (8,477)         (888)
                                                                       ---------     ---------
Cash provided by operating activities................................    267,692       152,698
                                                                       ---------     ---------
Investing Activities
Additions to property, plant and equipment
  -- Acquisition of PCS Phosphate....................................         --      (812,226)
  -- Additions to property, plant and equipment......................    (37,101)      (14,335)
Proceeds on disposal of property, plant and equipment................     22,285           448
Disposals of (additions to) other assets.............................        309        (9,424)
                                                                       ---------     ---------
Cash used in investing activities....................................    (14,507)     (835,537)
                                                                       ---------     ---------
Cash (deficiency) before financing activities........................    253,185      (682,839)
                                                                       ---------     ---------
Financing Activities
(Repayment of) proceeds from long-term obligations...................   (151,586)      759,105
Proceeds from short-term debt........................................         --        22,947
Dividends............................................................    (35,816)      (33,997)
Issuance of shares...................................................      2,254         2,079
                                                                       ---------     ---------
Cash (used in) provided by financing activities......................   (185,148)      750,134
                                                                       ---------     ---------
Increase in Cash.....................................................     68,037        67,295
Cash, Beginning of Period............................................     40,497        16,576
                                                                       ---------     ---------
Cash, End of Period..................................................  $ 108,534     $  83,871
                                                                       =========     =========
Supplemental cash flow disclosure
  Interest paid......................................................  $  39,091     $  22,491
  Income taxes paid..................................................  $  24,419     $   9,375
</TABLE>
 
              (See Notes to the Consolidated Financial Statements)
 
                                        3
<PAGE>   5
 
                    POTASH CORPORATION OF SASKATCHEWAN INC.
 
                 NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS
                         (IN THOUSANDS OF U.S. DOLLARS)
                                  (UNAUDITED)
 
 1. SIGNIFICANT ACCOUNTING POLICIES
 
     The Company's accounting policies are in accordance with accounting
principles generally accepted in Canada. These policies are consistent with
accounting principles generally accepted in the United States except as outlined
in Note 5.
 
  Basis of presentation
 
     The consolidated financial statements include the accounts of Potash
Corporation of Saskatchewan Inc. and its subsidiaries.
 
 2. INVENTORIES
 
<TABLE>
<CAPTION>
                                                             SEPTEMBER 30,     DECEMBER 31,
                                                                 1996              1995
                                                             -------------     ------------
        <S>                                                  <C>               <C>
        Finished product...................................    $  86,031         $115,491
        Materials and supplies.............................       70,335           66,708
        Raw materials......................................        9,142           11,954
        Work in process....................................       23,949           27,758
                                                                --------         --------
                                                               $ 189,457         $221,911
                                                                ========         ========
</TABLE>
 
 3. EARNINGS PER SHARE
 
     Year-to-date earnings per share are calculated on the weighted average
shares issued and outstanding during the nine months ended September 30, 1996 of
45,525,000 (1995 -- 43,202,000).
 
 4. DIVIDENDS
 
     The Company declares its dividends in Canadian dollars.
 
 5. UNITED STATES GENERALLY ACCEPTED ACCOUNTING PRINCIPLES
 
     A description of the accounting principles which differ significantly in
certain respects from generally accepted accounting principles in the United
States (US GAAP) follows:
 
     Earnings per share: In computing primary earnings per share, under US GAAP,
the stock options are included in the calculation to the extent that they are
exercisable.
 
     Deferred income taxes: Deferred tax assets have been recognized only to the
extent of reducing deferred tax liabilities. US GAAP would require that deferred
tax assets be recorded when their realization is more likely than not.
 
                                        4
<PAGE>   6
 
                    POTASH CORPORATION OF SASKATCHEWAN INC.
 
           NOTES TO THE CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
                         (IN THOUSANDS OF U.S. DOLLARS)
                                  (UNAUDITED)
 
     The application of US GAAP, as described above, would have had the
following approximate effects on net income, net income per share, total assets
and shareholders' equity:
 
<TABLE>
<CAPTION>
                                               THREE MONTHS ENDED             NINE MONTHS ENDED
                                                  SEPTEMBER 30                  SEPTEMBER 30
                                            -------------------------     -------------------------
                                               1996           1995           1996           1995
                                            ----------     ----------     ----------     ----------
<S>                                         <C>            <C>            <C>            <C>
Net income as reported in the consolidated
  statements of income and retained
  earnings................................  $   46,772     $   23,077     $  162,848     $  122,296
Item decreasing reported net income
Deferred income taxes.....................       1,435             --          5,753             --
                                            ----------     ----------     ----------     ----------
Approximate net income -- US GAAP.........  $   45,337     $   23,077     $  157,095     $  122,296
                                            ==========     ==========     ==========     ==========
Weighted average shares outstanding -- US
  GAAP....................................  46,028,000     43,834,000     45,989,000     43,589,000
                                            ==========     ==========     ==========     ==========
Net income per share -- US GAAP...........  $     0.98     $     0.52     $     3.42     $     2.80
                                            ==========     ==========     ==========     ==========
</TABLE>
 
<TABLE>
<CAPTION>
                                                                     SEPTEMBER 30,     DECEMBER 31,
                                                                         1996              1995
                                                                     -------------     ------------
<S>                                                                  <C>               <C>
Total assets as reported in the consolidated statements of
  financial position...............................................   $ 2,520,498       $2,581,817
Item increasing reported total assets
Deferred income tax asset..........................................        12,845           18,598
                                                                       ----------       ----------
Approximate total assets -- US GAAP................................   $ 2,533,343       $2,600,415
                                                                       ==========       ==========
Shareholders' equity as reported in the consolidated statements of
  financial position...............................................   $ 1,371,161       $1,241,875
Item increasing reported shareholders' equity
Deferred income taxes..............................................        12,845           18,598
                                                                       ----------       ----------
Approximate shareholders' equity -- US GAAP........................   $ 1,384,006       $1,260,473
                                                                       ==========       ==========
</TABLE>
 
 6. COMPARATIVE FIGURES
 
     Certain of the prior period's comparative figures have been reclassified to
conform with the current period's presentation. Results for the first nine
months of 1995 do not include: (1) the results of White Springs which was
acquired October 31, 1995, and (2) the results of PCS Phosphate (formerly
Texasgulf Inc.) prior to April 10, 1995, the date of acquisition.
 
 7. PROPOSED ACQUISITIONS
 
     On September 2, 1996 the Company entered into a definitive agreement to
acquire Arcadian Corporation, subject to approval by Arcadian shareholders and
other conditions. For each share of common stock of Arcadian (approximately 45.5
million on a fully diluted basis) the price is expected to be U.S. $25 to $27
per share -- $12.25 in cash and the remainder in common shares of the Company at
an exchange ratio of 0.17713 of a share of the Company (subject to adjustment)
for a share of Arcadian.
 
     The Company is engaged in discussions with BASF AG to acquire for cash, a
51% interest in Kali und Salz AG (K&S AG). The holdings of K&S AG include a 51%
interest in Kali und Salz GmbH and a 50% interest in Potacan.
 
                                        5
<PAGE>   7
 
ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
        OF OPERATIONS
 
RESULTS OF OPERATIONS
 
OVERVIEW
 
     Third quarter and year-to-date September 30 results for 1995 do not include
(1) the results of White Springs, which was acquired October 31, 1995, and (2)
the results of PCS Phosphate (formerly Texasgulf Inc.) prior to April 10, 1995,
the date of acquisition.
 
     Net sales and net income for the three months ended September 30, 1996,
improved 59 percent and 103 percent, respectively, over the same period in 1995.
Net income for the three months ended September 30, 1996, was $46.8 million
(1995 -- $23.1 million) on net sales of $342.1 million (1995 -- $214.6 million),
or $1.03 per share (1995 -- $0.53 per share). For the third quarter of 1996,
gross margin and operating income were $91.0 million and $66.4 million,
respectively, compared to a gross margin of $62.2 million and an operating
income of $41.2 million for the same period in 1995 (increases of 46 percent and
61 percent, respectively).
 
     For the three months ended September 30, 1996, North American and offshore
net sales revenue were $202.9 million (1995 -- $101.2 million) and $139.2
million (1995 -- $113.4 million), respectively. North American net sales revenue
represented 59 percent (1995 -- 47 percent) of total net sales revenue, whereas
offshore sales represented 41 percent of net sales revenue (1995 -- 53 percent).
 
     Potash, phosphate and ammonia revenue for the quarter ended September 30,
1996 were $101.6 million (1995 -- $84.0 million), $217.4 million (1995 -- $130.6
million), and $23.1 million (1995 -- not applicable), respectively, an increase
of $17.6 million in potash revenue, an $86.8 million increase in phosphate
revenue and a $23.1 million increase in ammonia revenue, when compared to the
same period a year ago.
 
     Gross margins for the third quarter of 1996 increased $28.8 million or 46
percent over the same quarter in 1995. Gross margin for potash was $44.9
million, an increase of $3.3 million when compared to the same quarter of 1995.
Gross margins for phosphate fertilizer, feed, industrial and ammonia products
were $27.3 million (1995 -- $9.5 million), $12.3 million (1995 -- $9.7 million),
$6.1 million (1995 -- $1.3 million) and $0.4 million (1995 -- not applicable),
respectively. Domestic fertilizer sales were strong in both potash and phosphate
nutrients as customers purchased during the summer fill program in anticipation
of a good fall application period.
 
     The increase in net income of $23.7 million for the quarter ended September
30, 1996 is largely attributable to additional revenues from the phosphate
acquisitions, record third quarter potash sales volumes, improved phosphate
prices and lower interest expense. This was offset by an increase in cost of
goods sold, income taxes and selling and administrative expenses.
 
     Net sales and net income for the nine months ended September 30, 1996
improved 91 percent and 33 percent, respectively, over the same period in 1995.
Net income for the nine months ended September 30, 1996 was $162.8 million
(1995 -- $122.3 million) on net sales of $1,061.4 million (1995 -- $555.0
million), or $3.58 per share (1995 -- $2.83 per share). For the first nine
months of 1996, gross margin and operating income were $294.5 million and $227.9
million, respectively, compared to a gross margin of $220.7 million and
operating income of $158.1 million for the same period in 1995 (increases of 33
percent and 44 percent, respectively).
 
     For the nine months ended September 30, 1996, North American and offshore
net sales revenue were $638.2 million (1995 -- $246.1 million) and $423.2
million (1995 -- $309.0 million), respectively. North American net sales revenue
represented 60 percent (1995 -- 44 percent) of total net sales revenue, whereas
offshore sales represented 40 percent of net sales revenue (1995 -- 56 percent).
 
     Potash, phosphate and ammonia net sales revenue for the first nine months
of 1996 were $309.4 million (1995 -- $329.3 million), $663.5 million
(1995 -- $225.8 million), and $88.4 million (1995 -- not applicable),
respectively, a decrease of $19.8 million in potash net sales revenue, a $437.8
million increase in
 
                                        6
<PAGE>   8
 
phosphate net sales revenue and an $88.4 million increase in ammonia net sales
revenue, when compared to the same period a year ago.
 
     Gross margins for the first nine months of 1996 increased $73.8 million or
33 percent over the same period in 1995. Gross margin for potash was $148.7
million, a decrease of $31.9 million when compared to the first nine months of
1995. This decrease was more than offset by a gross margin of $145.8 million for
phosphate and ammonia. Of this $145.8 million gross margin, $91.9 million
(1995 -- $18.3 million) is attributable to phosphate fertilizer products, $32.1
million (1995 -- $12.9 million) is attributable to feed products, $19.7 million
(1995 -- $8.8 million) is attributable to industrial products, and $2.1 million
(1995 -- not applicable) is attributable to ammonia.
 
     The increase in net income of $40.6 million for the nine months ended
September 30, 1996, is largely attributable to additional revenues from the
phosphate acquisitions, improved phosphate prices and a decrease in Saskatchewan
provincial mining and other taxes. This was offset by an increase in interest
expense of $10.5 million relating to debt financing of $878.8 million incurred
to purchase PCS Phosphate and White Springs, a $432.6 million increase in cost
of sales, an $18.7 million increase in income taxes, and an increase in selling
and administrative expenses of $8.5 million.
 
     Although the Company had increased earnings in the first nine months of
1996 when compared to the same period in 1995, market conditions did not live up
to the expectations for the fertilizer industry in general. Inclement spring
weather put a damper on the domestic market, resulting in a delayed seeding and
harvest season. In the export market, large purchases at the end of 1995, and
subsidy issues resulted in fewer sales to China and India during the first nine
months of 1996 when compared to the first nine months of 1995. After a slow
start, shipments to Brazil picked up and have remained strong in 1996.
 
     The Company is engaged in discussions with BASF AG to acquire from BASF AG,
for cash, a 51 percent interest in the German publicly traded company, K&S AG.
The holdings of K&S AG include a 51 percent interest in Kali und Salz GmbH which
is the owner and operator of Germany's potash mines. The remaining 49 percent
interest in Kali und Salz GmbH is held by Beteiligungs-Management-Gesellschaft
Berlin mbH (BMGB), an agency of the German government. Potacan is a joint
venture between K&S AG and Enterprise Miniere et Chimique of Paris, France.
Potacan, through a subsidiary, owns and operates a potash mine near Sussex, New
Brunswick. The agreement of purchase and sale, if concluded, will be subject to
necessary regulatory approval.
 
     The Company and Arcadian Corporation (NYSE: ACA; ACA PRA) jointly announced
that they have entered into a definitive merger agreement. The Company is to
acquire all the outstanding common stock of Arcadian (approximately 45.5 million
shares on a fully diluted basis) at a price of U.S. $25 to U.S. $27 per share,
providing U.S. $12.25 per share in cash and the remainder in common stock of the
Company at an exchange of 0.17713 shares of the Company (subject to adjustment)
for every share of Arcadian.
 
     The merger agreement contemplates that Arcadian's outstanding shares of
Mandatorily Convertible Preferred Stock, Series A, will be converted into shares
of Arcadian common stock immediately prior to the merger date and will be
treated identically to all other shares of Arcadian common stock in the merger.
The merger agreement includes certain conditions, including, among other things,
the approval by the Arcadian stockholders. The terms of the transaction,
including the offering of the Company's common shares, will be set forth by
means of a proxy statement/prospectus.
 
POTASH REVENUE
 
     Potash net sales revenue for the quarter ended September 30, 1996 increased
by $17.6 million or 21 percent as compared to the same period in 1995
(1996 -- $101.6 million; 1995 -- $84.0 million). The Company sold 1.437 million
tonnes of potash in the third quarter of 1996, compared to 1.138 million tonnes
sold in the same period last year, an increase of .299 million tonnes or 26
percent. Potash prices decreased by 4 percent for the third quarter of 1996 when
compared to the third quarter of 1995.
 
     In the third quarter of 1996, North American and offshore potash sales
volumes increased 60 percent and 3 percent, respectively, over the same period
in 1995. Domestic customers bought mainly during the summer
 
                                        7
<PAGE>   9
 
prior to announced price increases. Exclusive of sales to another producer,
prices received from domestic customers were down slightly which is often the
case during a summer fill. Potash prices increased 5 percent in the offshore
market. There was a greater proportion of higher priced New Brunswick tonnes
sold in the export market compared to the same period a year ago. Price
realizations in the domestic market were down by 9 percent from the third
quarter a year ago.
 
     North American net sales revenue from potash operations represented 42
percent of the potash sales revenue of the Company during the third quarter of
1996 (1995 -- 35 percent). In the third quarter of 1996, the increase in North
American potash sales volumes and the decrease in North American prices resulted
in a $13.4 million increase in North American potash net sales revenue over the
same period in 1995. North American potash sales volumes for the third quarter
of 1996 increased .279 million tonnes (1996 -- .745 million tonnes; 1995 -- .466
million tonnes) compared to the third quarter of 1995. Sales volumes of .084
million tonnes to another producer increased North American volumes.
 
     In the third quarter of 1996, offshore net sales revenue from potash
operations represented 58 percent of potash net sales revenue of the Company
(1995 -- 65 percent). In the third quarter of 1996, the increase in offshore
sales volumes and the increase in overall offshore selling price resulted in a
$4.2 million increase in offshore potash net sales revenue over the same period
in 1995. In the offshore market, the Company sold .691 million potash tonnes
during the third quarter of 1996 (1995 -- .672 million tonnes), an increase of 3
percent. Of the .691 million tonnes, .502 million tonnes were sold through
Canpotex and the remaining .189 million tonnes were produced by PCS New
Brunswick and sold and delivered to offshore markets, such as Brazil, by PCS
Sales.
 
     Potash net sales revenue for the first nine months of 1996 decreased by
$19.9 million or 6 percent as compared to the first nine months of 1995
(1996 -- $309.4 million; 1995 -- $329.3 million). The Company sold 4.324 million
tonnes of potash in the first nine months of 1996, compared to 4.590 million
tonnes sold in the same period last year, a decrease of .266 million tonnes or 6
percent. Overall potash prices were flat in the first nine months of 1996 as
compared to the first nine months of 1995.
 
     In the first nine months of 1996, North American and offshore potash sales
volumes increased 20 percent and decreased 21 percent, respectively, over the
same period in 1995.
 
     North American net sales revenue from potash operations represented 40
percent of the potash net sales revenue of the Company during this year's first
nine months. In the first nine months of 1996, the increase in North American
potash sales volumes and a decrease in North American prices resulted in a $12.9
million increase in North American potash net sales revenue over the same period
in 1995. North American potash sales volumes for the first nine months of 1996
increased .346 million tonnes (1996 -- 2.066 million tonnes; 1995 -- 1.720
million tonnes) compared to the first nine months of 1995.
 
     In the first nine months of 1996, offshore net sales revenue from potash
operations represented 60 percent of potash net sales revenue of the Company. In
the first nine months of 1996, the decrease in offshore sales volumes and the
increase in overall offshore selling price resulted in a $32.7 million decrease
in offshore potash net sales revenue over the same period in 1995. In the
offshore market, the Company sold 2.257 million potash tonnes during the first
nine months of 1996 (1995 -- 2.870 million tonnes), a decrease of 21 percent. Of
the 2.257 million tonnes, 1.729 million tonnes were sold through Canpotex and
the remaining .528 million tonnes were produced by PCS New Brunswick and sold
and delivered to offshore markets.
 
PHOSPHATE REVENUE
 
     For the quarter ended September 30, 1996, phosphate net sales revenue was
$217.4 million; phosphate fertilizer $151.7 million (70 percent); non-fertilizer
products $63.6 million (29 percent); and phosphate rock $2.1 million (1
percent). For the same quarter in 1995 net sales revenue was $130.6 million;
phosphate fertilizer $83.4 million (64 percent); non-fertilizer products $45.2
million (35 percent); and phosphate rock $2.0 million (1 percent).
 
     During the third quarter of 1996, the Company sold .783 million tonnes of
phosphate fertilizer (.382 million tonnes in North America; .401 million tonnes
in the offshore market); .223 million tonnes of
 
                                        8
<PAGE>   10
 
non-fertilizer products (.205 million tonnes in North America; .018 million
tonnes in the offshore market); and .059 million tonnes of phosphate rock (.001
million tonnes in North America and the remaining .058 million tonnes in the
offshore market). For the comparable period in 1995, the Company sold .461
million tonnes of phosphate fertilizer (.156 million tonnes in North America;
 .305 million tonnes in the offshore market); .178 million tonnes of
non-fertilizer products (.155 million tonnes in North America; .023 million
tonnes in the offshore market); and .085 million tonnes of phosphate rock (.013
million tonnes in North America and the remaining .072 million tonnes in the
offshore market).
 
     For the third quarter of 1996, North American phosphate net sales revenue
accounted for $136.9 million (63 percent) of total phosphate net sales revenue
of $217.4 million. In the quarter ended September 30, 1996, 56 percent of the
Company's North American phosphate net sales revenue was earned from phosphate
fertilizer products which represented 65 percent of the Company's North American
phosphate sales volumes. Offshore sales accounted for 37 percent of total
phosphate product net sales revenue for the third quarter of 1996 and 44 percent
of volumes. In the quarter ended September 30, 1996, 92 percent of the Company's
offshore phosphate net sales revenue was earned from phosphate fertilizer
products which represented 84 percent of the Company's offshore phosphate sales
volumes.
 
     Third quarter 1996 net sales revenue from liquid and solid fertilizer was
$151.6 million (1995 -- $83.3 million) with sales volumes of .783 million tonnes
(1995 -- .461 million tonnes). Solid phosphate fertilizer (substantially all
DAP) accounted for 62 percent or $94.3 million of the total. Offshore net sales
revenue of DAP accounted for 57 percent of solid fertilizer net sales revenue
while North American net sales revenue of liquid fertilizer accounted for 59
percent of liquid fertilizer net sales revenue. The average net sales price for
liquid and solid fertilizer improved by 14 percent and 4 percent, respectively.
DAP prices were down for the third quarter of 1996 when compared to the second
quarter of 1996. Export liquid and solid fertilizer sales prices improved by 13
percent and 5 percent, respectively, compared to the same period a year ago.
North American liquid fertilizer sales prices improved 5 percent while solid
fertilizer sales prices increased slightly when compared to the same period in
1995.
 
     Net sales revenue from non-fertilizer products (animal feed and industrial)
during the quarter ended September 30, 1996, were $63.6 million (1995 -- $45.2
million) with sales volumes of .223 million tonnes (1995 -- .178 million
tonnes). For the third quarter of 1996, feed sales tonnage was .176 million
tonnes (1995 -- .120 million tonnes) with 10 percent sold offshore while the
remaining .047 million tonnes were industrial products sold to North American
customers. Feed product prices for the quarter ended September 30, 1996,
improved by 13 percent when compared to the same period a year ago. North
American industrial selling prices increased by 28 percent for the third quarter
of 1996 when compared to the same period in 1995.
 
     Phosphate net sales revenue for the nine months ended September 30, 1996
was $663.5 million. The distribution of this revenue was as follows: phosphate
fertilizer $462.4 million (70 percent); non-fertilizer products (animal feed and
industrial products) $195.8 million (29 percent); and phosphate rock $5.3
million (1 percent).
 
     During the nine months ended September 30, 1996, the Company sold 2.313
million tonnes of phosphate fertilizer (1.138 million tonnes in North America;
1.175 million tonnes in the offshore market); .741 million tonnes of
non-fertilizer products (.681 million tonnes in North America; .060 million
tonnes in the offshore market); and .166 million tonnes of phosphate rock (.003
million tonnes in North America and the remaining .163 million tonnes in the
offshore market). For the comparable period in 1995, the Company sold .761
million tonnes of phosphate fertilizer (.270 million tonnes in North America;
 .491 million tonnes in the offshore market); .334 million tonnes of
non-fertilizer products (.304 million tonnes in North America; .030 million
tonnes in the offshore market); and .187 million tonnes of phosphate rock (.024
million tonnes in North America and the remaining .163 million tonnes in the
offshore market).
 
     For the first nine months of 1996, North American phosphate net sales
revenue accounted for $426.1 million (64 percent) of total phosphate net sales
revenue of $663.5 million. In the nine months ended September 30, 1996, 57
percent of the Company's North American phosphate net sales revenue was earned
from phosphate fertilizer products which represented 62 percent of the Company's
North American phosphate sales volumes. Offshore sales accounted for 36 percent
of total phosphate product net sales revenue for the first
 
                                        9
<PAGE>   11
 
nine months of 1996 and 43 percent of volumes. In the nine months ended
September 30, 1996, 92 percent of the Company's offshore phosphate net sales
revenue was earned from phosphate fertilizer products which represented 84
percent of the Company's offshore phosphate sales volumes.
 
     For the first nine months of 1996 net sales revenue from liquid and solid
fertilizers was $462.4 million (1995 -- $136.5 million) with sales volumes of
2.313 million tonnes (1995 -- .761 million tonnes). Solid phosphate fertilizer
(substantially all DAP) accounted for 62 percent or $286.4 million of the total.
Offshore net sales revenue of DAP accounted for 56 percent of solid fertilizer
net sales revenue while North American net sales revenue of liquid fertilizer
accounted for 67 percent of liquid fertilizer net sales revenue. The average net
sales price for liquid and solid fertilizer improved by 13 percent and 10
percent, respectively. Export liquid and solid fertilizer sales prices improved
by 9 percent and 12 percent, respectively, compared to the same period a year
ago. North American liquid and solid fertilizer sales prices improved 4 percent
and 6 percent, respectively, when compared to the same period in 1995.
 
     Net sales revenue from animal feed and industrial products during the nine
months ended September 30, 1996, were $195.8 million (1995 -- $85.1 million)
with sales volumes of .741 million tonnes (1995 -- .334 million tonnes). For the
first nine months of 1996, feed sales tonnage was .569 million tonnes (1995 --
 .226 million tonnes) with 11 percent sold offshore while the remaining .173
million tonnes were industrial products (1995 -- .108 million tonnes) sold to
North American customers. Feed product prices for the nine months ended
September 30, 1996, improved by 8 percent when compared to the same period a
year ago. North American industrial selling prices increased by 8 percent for
the first nine months of 1996 when compared to the same period in 1995.
 
AMMONIA REVENUE
 
     For the quarter ended September 30, 1996, ammonia sales contributed $23.2
million to net sales revenue with sales volumes of .128 million tonnes. Ammonia
sales for the nine months ended September 30, 1996 contributed $88.4 million to
net sales revenue with sales volumes of .451 million tonnes.
 
COST OF GOODS SOLD
 
     During the third quarter of 1996 the Company produced .748 million
potassium chloride (KCl) tonnes, a 3 percent decrease from the .770 million
tonnes produced in the third quarter of 1995, due to lower demand. During the
third quarter of 1996 the Company produced .533 million phosphoric acid (P2O5)
tonnes (1995 -- .283 million tonnes), an increase of 88 percent, due principally
to the addition of White Springs.
 
     Shutdown weeks were similar but potash unit cost of sales increased by 6
percent in the third quarter of 1996 compared to the same period in 1995 as the
Company sold product from higher cost inventory produced during the second
quarter of 1996.
 
     In the third quarter of 1996, lower input cost for both sulfur and ammonia
reduced phosphate cost of goods sold as compared to the second quarter of 1996.
Lower feed costs were the result of improved operations at White Springs.
 
     Depreciation expense for the third quarter of 1996 was $21.1 million
compared to $11.1 million in 1995, an increase of $10 million or 90 percent. The
increase is a result of an increase of $9.2 million in depreciation expense from
the acquired phosphate operations. Depreciation expense for the potash
operations increased by $.8 million as a result of higher sales tonnage in the
third quarter of 1996 when compared to the same period in 1995.
 
     For the nine months ended September 30, 1996, the Company produced 3.959
million potassium chloride (KCl) tonnes, compared to 4.701 million tonnes in the
first nine months of 1995, a decrease of .742 million tonnes (16 percent)
compared to 1995. For the nine months ended September 30, 1996, the Company
produced 1.553 million phosphoric acid (P2O5) tonnes from its phosphate
operations, compared to .554 million tonnes in 1995.
 
                                       10
<PAGE>   12
 
     Potash unit cost of sales increased by 15 percent in the first nine months
of 1996 compared to the same period in 1995 due in part to 16.4 additional
shutdown weeks and a greater proportion of higher cost New Brunswick product in
the mix.
 
     Depreciation expense for the first nine months of 1996 was $67.2 million
compared to $44.1 million in 1995, an increase of $23.1 million or 52 percent.
The increase is a result of $26.7 million additional depreciation from the
acquired phosphate operations. Depreciation expense for the potash operations
decreased by $3.6 million as a result of additional shutdown weeks in the first
nine months of 1996 when compared to the same period in 1995.
 
SELLING AND ADMINISTRATIVE
 
     Selling and administrative expenses during the third quarter of 1996 were
$15.1 million as compared to $14.1 million in 1995, an increase of $1.0 million.
During the first nine months of 1996, selling and administrative expenses were
$44.0 million as compared to $35.5 million in 1995, an increase of $8.5 million.
The increase is attributable to the acquisitions of PCS Phosphate and White
Springs and to general increases in supplies, compensation and benefits.
 
PROVINCIAL MINING AND OTHER TAXES
 
     Saskatchewan's potash production tax is comprised of a base tax per tonne
of product sold and an additional tax based on mine-by-mine profits. The New
Brunswick division and the Saskatchewan divisions pay a provincial crown
royalty, which is accounted for under cost of goods sold.
 
     Increased profitability at certain of the mines increased the rate of taxes
paid to the Saskatchewan government but total taxes were reduced by lower prices
and potash sales volumes from Saskatchewan. For the third quarter of 1996,
Saskatchewan provincial mining and other taxes were $8.6 million as compared to
$8.8 million in the third quarter of 1995, a decrease of 2 percent. Potash
production tax for the third quarter of 1996 was $5.6 million compared to $6.4
million in the same period in 1995, a decrease of 12 percent. Saskatchewan
capital tax was $3.0 million in the third quarter ended September 30, 1996
compared to $2.4 million in the same period in 1995, an increase of 27 percent.
For the first nine months of 1996, Saskatchewan provincial mining and other
taxes were $29.5 million as compared to $32.6 million in the first nine months
of 1995, a decrease of 10 percent. Potash production tax for the first nine
months of 1996 was $19.8 million compared to $22.1 million in the same period in
1995, a decrease of 10 percent. Saskatchewan capital tax was $9.7 million in the
nine months ended September 30, 1996 compared to $10.5 million in the same
period in 1995, a decrease of 8 percent.
 
INTEREST EXPENSE
 
     For the third quarter of 1996, interest expense was $11.0 million as
compared to $13.8 million in the same period in 1995. For the first nine months
of 1996, interest expense was $36.8 million as compared to $26.3 million in the
same period in 1995. The 1996 amount includes the debt incurred with the
acquisition of the phosphate properties acquired last year in April and October
while the 1995 amount includes only the April acquisition.
 
INCOME TAXES
 
     Income taxes in the third quarter of 1996 were $8.6 million, compared to
$4.3 million in the same period of 1995, an increase of $4.3 million. Income
taxes in the first nine months of 1996 were $28.3 million, compared to $9.6
million in the same period of 1995, an increase of $18.7 million. The increase
is largely attributable to US withholding taxes, alternative minimum taxes and
deferred income tax, relating to the Company's acquired phosphate operations.
The tax rate applicable to the U.S. operations for the first nine months of 1996
and for the first nine months of 1995 is approximately 21 percent of income
before taxes.
 
                                       11
<PAGE>   13
 
ANALYSIS OF FINANCIAL CONDITION AND CASH FLOW
 
     Working capital for the first nine months of 1996 increased by $114.8
million. Cash flow from operations was $267.7 million. Quick and current ratios
were 1.18 and 2.05 at September 30, 1996 (.72 and 1.37 respectively at December
31, 1995). The Company paid down its debt by $151.6 million (of which $36.0
million was voluntary) and paid dividends of $35.8 million. At the end of the
first nine months of 1996, the debt to capital ratio was at 34.7 percent (41.5
percent at December 31, 1995) and the interest coverage ratio was 6.20:1 (6.02:1
at December 31, 1995). The net debt to market capitalization at September 30,
1996 was 18.6 percent (57.4 percent at December 31, 1995).
 
OUTLOOK
 
     The statements in this "Management Discussion and Analysis" in this
"Outlook" section, relating to the period after September 30, 1996, are
forward-looking statements subject to uncertainties. The Company's financial
performance continues to be affected by price, worldwide state of supply and
demand for potash and phosphate products, application rates, government
assistance programs, weather conditions, exchange rates and availability and
agricultural and trade policies of producing and consuming nations which, among
other things, are influenced by domestic political conditions. The Company sells
to a diverse group of customers both by geography and by end product. Market
conditions by country will vary on a year-over-year basis and sales shift from
one period to another.
 
     The rising world population and the demand for better diets in developing
nations are expected to continue to drive consumption for fertilizer products
over the long-term. Over the short-term, there should be increased fertilizer
usage over the next few years as world grain stocks are at historically low
levels, crop prices remain strong, and governments around the world focus on
food production. The Company expects to be an important supplier to these
markets. While the consumption trend line is expected to continue to climb over
the long-term, there will be, at times, fluctuations in demand.
 
     The long-term outlook for PCS products continues to be optimistic. In the
short term, the offshore DAP market is improving which should support increased
prices. Prices remain firm in liquid phosphates. The health of the DAP market
depends on continued shipments to China while phosphoric acid is influenced by
shipments to India, which remain on schedule. In Brazil, the phosphate market
has improved in the second half of 1996. Brazil has been a large purchaser in
the potash market in 1996 as well. Subsidy issues in China and India have
affected potash shipments there but both countries are using internal
inventories and the prospects for 1997 shipments are promising. The feed
phosphate business tends to be strongest in the winter months.
 
     PCS continues to operate its potash mines by matching production to sales
demand. Shutdowns at potash mines for inventory correction will influence potash
production costs on a quarter over quarter comparative basis. Natural gas costs
are expected to be reduced by approximately 15 percent in the Saskatchewan
operations based on existing contracts for 1996. Sulphur and ammonia prices have
moderated and are expected to impact favourably upon phosphate processing input
costs for 1996.
 
     Capital expenditures in 1996 will exceed those in 1995 primarily due to a
full year of phosphate ownership and operation. Plans for such expenditures are
limited to sustaining capital.
 
     The narrative, included under this Management Discussion and Analysis, has
been prepared with reference to the financial statements reported under Canadian
Generally Accepted Accounting Principles.
 
                                       12
<PAGE>   14
 
PART II. OTHER INFORMATION
 
ITEM 1. LEGAL PROCEEDINGS
 
CIVIL ANTITRUST COMPLAINTS
 
     In June, 1993, the Company and a wholly-owned subsidiary, Potash
Corporation of Saskatchewan Sales Limited, whose name has been changed to PCS
Sales (Canada) Inc. ("PCS Sales"), were served with a complaint relating to a
suit filed in the United States District Court for Minnesota against most North
American potash producers, including the Company. The complaint alleges a
conspiracy among the defendants to fix the price of potash purchased by the
plaintiffs as well as potash purchased by the members of a class of certain
purchasers proposed by the plaintiffs. The complaint seeks treble damages in an
unspecified amount and other relief. Similar complaints were filed in the United
States District Courts for the Northern District of Illinois and the Western
District of Virginia. On motion of the defendants, all of the complaints were
transferred and consolidated for pre-trial purposes in the United States
District Court for Minnesota. Amended complaints were filed in March and April
1994. On January 12, 1995, the Minnesota Federal Court granted the plaintiffs'
motion for class certification. The Company and PCS Sales filed a motion for
summary judgment on December 22, 1995. United States Magistrate Raymond L.
Erickson held oral argument on that motion on April 18, 1996. On September 13,
1996, Magistrate Judge Erickson issued a report recommending that the court
grant defendant's motion for summary judgment. That recommendation is currently
being considered by Judge Richard H. Kyle, who has scheduled a December 19, 1996
oral argument.
 
     Additional complaints were filed in the California and Illinois State
Courts on behalf of purported classes of indirect purchasers of potash in those
states. The Company moved to dismiss the California State Court lawsuit for lack
of personal jurisdiction and the court ruled that it does not have personal
jurisdiction over the Company but that it does have personal jurisdiction over
PCS Sales. The case remains at an early stage; no merits discovery has taken
place. The Illinois State Court dismissed the Illinois State Court complaint for
failure to state a cause of action. The Illinois plaintiff has appealed that
dismissal.
 
     Insofar as the allegations of wrongdoing relate to the Company, management
of the Company, having consulted with legal counsel, believes that the
allegations are without merit, that the Company has valid defences and that the
lawsuits will not have a material adverse effect on the Company.
 
ARCADIAN CORPORATION SHAREHOLDER LITIGATION
 
     Following the public announcement on August 7, 1996 of Arcadian
Corporation's execution of a letter of intent with Freeport-McMoRan Inc.
concerning a potential business combination, five lawsuits were filed in the
Court of Chancery of the State of Delaware in and for New Castle County on
behalf of a purported class of all stockholders of Arcadian Corporation other
than the defendants and their affiliates. Arcadian and some or all of its
directors (including one former director who was subsequently dismissed from the
lawsuits) were named as defendants in the lawsuits. On September 5, 1996,
following the public announcement of the Company's proposed acquisition of
Arcadian Corporation through a merger (the "Merger"), an amended complaint (the
"Amended Complaint") was filed in two of the five lawsuits. The Company is named
as an additional defendant in the Amended Complaint, but the Company has not yet
received service of process. The Amended Complaint alleges generally that the
defendants acted improperly in causing Arcadian Corporation to enter into a
merger agreement with the Company, and seeks an injunction preventing the
Merger, unspecified monetary damages and other relief. On September 16, 1996,
the court signed an order consolidating all five lawsuits and ordering that the
Amended Complaint serve as the complaint in the consolidated action. Arcadian
and its directors have agreed to respond formally to the Amended Complaint on or
before November 27, 1996. The defendants have stated that they intend to
vigorously defend the lawsuit.
 
BFI, INC. LITIGATION
 
     On May 20, 1995 a complaint was filed by Occidental Chemical Corporation
("Oxychem") against Bienville Forest Investments, Inc. ("BFI, Inc.") seeking
conveyance of 365 acres of land from BFI, Inc., pursuant to an option to
purchase reclaimed lands. BFI Inc. counterclaimed against Oxychem seeking
 
                                       13
<PAGE>   15
 
damages arising from alleged trespass, nuisance, interference with business
relationships and fraud. BFI Inc. also, requested that the court require Oxychem
to convey certain properties to BFI Inc. that had been previously deeded by BFI
Inc. to Oxychem. White Springs Agricultural Chemicals, Inc. ("White Springs")
moved to intervene as a party and the court granted the motion. BFI, Inc. has
argued that the option is unenforceable on grounds including: (i) the option
allegedly constitutes an unreasonable restraint on alienation or a violation of
the rule against perpetuities; and (ii) enforcement allegedly is barred by the
statute of limitations, by the doctrine of laches, or by estoppel. White Springs
has similar options with respect to approximately 25,000 additional acres of
land in which BFI, Inc., and/or its affiliates, has an interest. On August 22,
1996, White Springs, BFI, Inc. and Glawson Investments Corp., a BFI, Inc.
affiliate ("Glawson"), signed a Settlement Agreement and a Letter of Intent for
Operating Agreement. The agreements settle the dispute among the parties as to
current and future land ownership and use. The agreements also release White
Springs from claims occurring on or after November 1, 1995, but do not release
claims that occurred while Occidental Chemical Corporation owned White Springs.
Under the agreements, White Springs did not agree to release any of its rights
to mine on any property; however, White Springs agreed to release future rights
to purchase property in the Suwannee River mine area while acquiring the right
to immediately purchase property in the Swift Creek mine area and White Springs
agreed to exchange with BFI, Inc. and Glawson certain properties to make their
respective holdings more nearly contiguous.
 
ITEM 6. EXHIBITS AND REPORTS ON FORM 8-K.
 
     (a) Exhibits
 
<TABLE>
<CAPTION>
        EXHIBIT NUMBER                            DESCRIPTION OF DOCUMENT
        --------------     ---------------------------------------------------------------------
        <C>                <S>
               2(a)        Agreement and Plan of Merger dated September 2, 1996, by and among
                           the registrant, Arcadian Corporation and PCS Nitrogen, Inc.
               3(i)        Restated Articles of Incorporation of the registrant dated October
                           31, 1989, as amended May 11, 1995, incorporated by reference to the
                           registrant's report on Form 10-K for the year ended December 31, 1995
                           (the "Form 10-K").
               3(ii)       Bylaws of the registrant dated March 2, 1995, incorporated by
                           reference to the Form 10-K.
               4(a)        Non-revolving Term Credit Facilities Agreement between The Bank of
                           Nova Scotia and other financial institutions and the registrant dated
                           April 10, 1995, incorporated by reference to Exhibit 4(b) to the Form
                           10-K.
               4(b)        First Amending Agreement between The Bank of Nova Scotia and other
                           financial institutions and the registrant dated May 23, 1995,
                           incorporated by reference to Exhibit 4(c) to the registrant's report
                           on Form 10-Q for the quarterly period ended March 31, 1996 (the "Form
                           10-Q").
               4(c)        Second Amending Agreement between The Bank of Nova Scotia and other
                           financial institutions and the registrant dated October 18, 1995,
                           incorporated by reference to Exhibit 4(d) to the Form 10-Q.
             The registrant hereby undertakes to file with the Securities and Exchange
        Commission, upon request, copies of any constituent instruments defining the rights of
        holders of long-term debt of the registrant or its subsidiaries that have not been filed
        herewith because the amounts represented thereby are less than 10% of the total assets
        of the registrant and its subsidiaries on a consolidated basis.
</TABLE>
 
                                       14
<PAGE>   16
 
<TABLE>
<CAPTION>
        EXHIBIT NUMBER                            DESCRIPTION OF DOCUMENT
        --------------     ---------------------------------------------------------------------
        <C>                <S>
              10(a)        Suspension Agreement concerning Potassium Chloride from Canada dated
                           January 7, 1988, among U.S. Department of Commerce, Potash
                           Corporation of Saskatchewan, International Minerals and Chemical
                           (Canada) Limited, Noranda, Inc. (Central Canada Potash Co.), Potash
                           Company of America, a Division of Rio Algom Limited, S & P Canada, II
                           (Kalium Chemicals), Cominco Ltd., Potash Company of Canada Limited,
                           Agent for Denison-Potacan Potash Co. and Saskterra Fertilizers Ltd.,
                           incorporated by reference to the registrant's Form F-1 (File No.
                           33-31303) (the "F-1 Registration Statement").
              10(b)        Sixth Voting Agreement dated April 22, 1978, between Central Canada
                           Potash, Division of Noranda, Inc., Cominco Ltd., International
                           Minerals and Chemical Corporation (Canada) Limited, PCS Sales and
                           Texasgulf Inc., incorporated by reference to the F-1 Registration
                           Statement.
              10(c)        Canpotex Limited Shareholders Seventh Memorandum of Agreement
                           effective April 21, 1978, between Central Canada Potash, Division of
                           Noranda Inc., Cominco Ltd., International Minerals and Chemical
                           Corporation (Canada) Limited, PCS Sales, Texasgulf Inc. and Canpotex
                           Limited as amended by Canpotex S & P amending agreement dated
                           November 4, 1987, incorporated by reference to the F-1 Registration
                           Statement.
              10(d)        Producer Agreement dated April 21, 1978, between Canpotex Limited and
                           PCS Sales, incorporated by reference to the F-1 Registration
                           Statement.
              10(e)        PCS Sales -- Saskterra Special Canpotex Entitlement effective June
                           13, 1990, incorporated by reference to the registrant's Form S-1
                           (File No. 33-36283).
              10(f)        Canpotex/PCS Amending Agreement, dated with effect October 1, 1992,
                           incorporated by reference to the Form 10-K.
              10(g)        Canpotex PCA Collateral Withdrawing/PCS Amending Agreement, dated
                           with effect October 7, 1993, incorporated by reference to the Form
                           10-K.
              10(h)        Esterhazy Restated Mining and Processing Agreement dated January 31,
                           1978, between International Minerals and Chemical Corporation
                           (Canada) Limited and the registrant's predecessor, incorporated by
                           reference to the F-1 Registration Statement.
              10(i)        Agreement dated December 21, 1990, between International Minerals &
                           Chemical Corporation (Canada) Limited and the registrant, amending
                           the Esterhazy Restated Mining and Processing Agreement dated January
                           31, 1978, incorporated by reference to the registrant's report on
                           Form 10-K for the year ended December 31, 1990.
              10(j)        Agreement dated October 13, 1995 between the registrant and Charles
                           E. Childers, incorporated by reference to the Form 10-K.
              10(k)        Potash Corporation of Saskatchewan Inc. Stock Option
                           Plan -- Unaffiliated Directors, incorporated by reference to
                           post-effective amendment No. 5 ("Amendment No. 5") to the
                           registrant's Form S-8 (File No. 33-37855).
              10(l)        Potash Corporation of Saskatchewan Inc. Stock Option Plan -- Officers
                           and Key Employees, incorporated by reference to Amendment No. 5.
              10(m)        Short Term Incentive Plan of the registrant, effective January 1,
                           1995.
              10(n)        Long-Term Incentive Plan of the registrant, as amended December 15,
                           1995, incorporated by reference to the Form 10-K.
</TABLE>
 
                                       15
<PAGE>   17
 
<TABLE>
<CAPTION>
        EXHIBIT NUMBER                            DESCRIPTION OF DOCUMENT
        --------------     ---------------------------------------------------------------------
        <C>                <S>
              10(o)        Resolution and Forms of Agreement for Supplemental Retirement Income
                           Plan, for officers and key employees of the registrant, incorporated
                           by reference to the Form 10-K.
              10(p)        Forms of Agreement dated December 30, 1994, between the registrant
                           and certain officers of the registrant, concerning a change in
                           control of the registrant, incorporated by reference to the Form
                           10-K.
              10(q)        Form of Agreement of Indemnification dated August 8, 1995, between
                           the registrant and certain officers and directors of the registrant,
                           incorporated by reference to the Form 10-K.
              10(r)        Deferred Compensation Plan, for certain officers of PCS Phosphate
                           Company, Inc, incorporated by reference to the Form 10-K.
              10(s)        Supplemental Retirement Benefits Plan, for eligible employees of PCS
                           Phosphate Company, Inc., incorporated by reference to the Form 10-K.
              10(t)        Second Amended and Restated Membership Agreement dated January 1,
                           1995, among Phosphate Chemicals Export Association, Inc. and members
                           of such association, including Texasgulf Inc. (now PCS Phosphate
                           Company, Inc.), incorporated by reference to the Form 10-K.
              10(u)        International Agency Agreement dated January 1, 1995, between
                           Phosphate Chemicals Export Association, Inc. and Texasgulf Inc. (now
                           PCS Phosphate Company, Inc.) establishing Texasgulf Inc. as exclusive
                           marketing agent for such association's wet phosphatic materials,
                           incorporated by reference to the Form 10-K.
              10(v)        General Partnership Agreement forming Albright & Wilson Company,
                           dated July 29, 1988 and amended January 31, 1995, between Texasgulf
                           Inc. (now PCS Phosphate Company, Inc.) and Albright & Wilson
                           Americas, Inc., incorporated by reference to the Form 10-K.
              10(w)        Royalty Agreement dated October 7, 1993, by and between the
                           registrant and Rio Algom Limited, incorporated by reference to the
                           Form 10-K.
              10(x)        Amending Resolution and revised forms of agreement regarding
                           Supplemental Retirement Income Plan of the registrant, incorporated
                           by reference to the registrant's report on Form 10-Q for the
                           quarterly period ended June 30, 1996 (the "Second Quarter Form
                           10-Q").
              10(y)        Employment Agreement dated May 16, 1996, by and between PCS Phosphate
                           Company, Inc. and Thomas J. Wright, incorporated by reference to the
                           Second Quarter Form 10-Q.
              10(z)        Shareholders Rights Agreement dated November 10, 1994, as amended on
                           March 28, 1995, and May 4, 1995, and approved by shareholders on May
                           11, 1995, incorporated by reference to the Form 10-K.
              11           Statement re Computation of Per Share Earnings.
              27           Financial Data Schedule.
</TABLE>
 
     (b) Reports on Form 8-K
 
     As of September 11, 1996, the registrant filed a report on Form 8-K
regarding its having entered into a definitive merger agreement under which it
agreed to acquire all of the outstanding common stock of Arcadian Corporation.
 
                                       16
<PAGE>   18
 
                                   SIGNATURES
 
     Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.
 
                                          POTASH CORPORATION OF
                                            SASKATCHEWAN INC.
 

October 31, 1996                          By:  /s/  CHARLES E. CHILDERS
                                             ------------------------------
                                               Charles E. Childers
                                               Chief Executive Officer


October 31, 1996                          By:  /s/  BARRY E. HUMPHREYS
                                             ------------------------------
                                               Barry E. Humphreys
                                               Sr. Vice President, 
                                               Finance and Treasurer
                                               (Principal Financial and 
                                               Accounting Officer)
 


                                       17
<PAGE>   19
 
                                 EXHIBIT INDEX
 
<TABLE>
<CAPTION>
EXHIBIT
NUMBER                             DESCRIPTION OF DOCUMENT
- ------     -----------------------------------------------------------------------
<S>        <C>                                                                      <C>
 2(a)      Agreement and Plan of Merger dated September 2, 1996, by and among the
           registrant, Arcadian Corporation and PCS Nitrogen, Inc.
 3(i)      Restated Articles of Incorporation of the registrant dated October 31,
           1989, as amended May 11, 1995, incorporated by reference to the
           registrant's report on Form 10-K for the year ended December 31, 1995
           (the "Form 10-K").
 3(ii)     Bylaws of the registrant dated March 2, 1995, incorporated by reference
           to the Form 10-K.
4(a)       Non-revolving Term Credit Facilities Agreement between The Bank of Nova
           Scotia and other financial institutions and the registrant dated April
           10, 1995, incorporated by reference to Exhibit 4(b) to the Form 10-K.
4(b)       First Amending Agreement between The Bank of Nova Scotia and other
           financial institutions and the registrant dated May 23, 1995,
           incorporated by reference to Exhibit 4(c) to the registrant's report on
           Form 10-Q for the quarterly period ended March 31, 1996 (the "Form
           10-Q").
4(c)       Second Amending Agreement between The Bank of Nova Scotia and other
           financial institutions and the registrant dated October 18, 1995,
           incorporated by reference to Exhibit 4(d) to the Form 10-Q.
 10(a)     Suspension Agreement concerning Potassium Chloride from Canada dated
           January 7, 1988, among U.S. Department of Commerce, Potash Corporation
           of Saskatchewan, International Minerals and Chemical (Canada) Limited,
           Noranda, Inc. (Central Canada Potash Co.), Potash Company of America, a
           Division of Rio Algom Limited, S & P Canada, II (Kalium Chemicals),
           Cominco Ltd., Potash Company of Canada Limited, Agent for
           Denison-Potacan Potash Co. and Saskterra Fertilizers Ltd., incorporated
           by reference to the registrant's Form F-1 (File No. 33-31303) (the "F-1
           Registration Statement").
 10(b)     Sixth Voting Agreement dated April 22, 1978, between Central Canada
           Potash, Division of Noranda, Inc., Cominco Ltd., International Minerals
           and Chemical Corporation (Canada) Limited, PCS Sales and Texasgulf
           Inc., incorporated by reference to the F-1 Registration Statement.
 10(c)     Canpotex Limited Shareholders Seventh Memorandum of Agreement effective
           April 21, 1978, between Central Canada Potash, Division of Noranda
           Inc., Cominco Ltd., International Minerals and Chemical Corporation
           (Canada) Limited, PCS Sales, Texasgulf Inc. and Canpotex Limited as
           amended by Canpotex S & P amending agreement dated November 4, 1987,
           incorporated by reference to the F-1 Registration Statement.
 10(d)     Producer Agreement dated April 21, 1978, between Canpotex Limited and
           PCS Sales, incorporated by reference to the F-1 Registration Statement.
 10(e)     PCS Sales -- Saskterra Special Canpotex Entitlement effective June 13,
           1990, incorporated by reference to the registrant's Form S-1 (File No.
           33-36283).
 10(f)     Canpotex/PCS Amending Agreement, dated with effect October 1, 1992,
           incorporated by reference to the Form 10-K.
 10(g)     Canpotex PCA Collateral Withdrawing/PCS Amending Agreement, dated with
           effect October 7, 1993, incorporated by reference to the Form 10-K.
</TABLE>
 
                                       18
<PAGE>   20
 
<TABLE>
<CAPTION>
EXHIBIT
NUMBER                             DESCRIPTION OF DOCUMENT
- ------     -----------------------------------------------------------------------
<S>        <C>                                                                      <C>
 10(h)     Esterhazy Restated Mining and Processing Agreement dated January 31,
           1978, between International Minerals and Chemical Corporation (Canada)
           Limited and the registrant's predecessor, incorporated by reference to
           the F-1 Registration Statement.
10(i)      Agreement dated December 21, 1990, between International Minerals &
           Chemical Corporation (Canada) Limited and the registrant, amending the
           Esterhazy Restated Mining and Processing Agreement dated January 31,
           1978, incorporated by reference to the registrant's report on Form 10-K
           for the year ended December 31, 1990.
10(j)      Agreement dated October 13, 1995 between the registrant and Charles E.
           Childers, incorporated by reference to the Form 10-K.
10(k)      Potash Corporation of Saskatchewan Inc. Stock Option Plan --
           Unaffiliated Directors, incorporated by reference to post-effective
           amendment No. 5 ("Amendment No. 5") to the registrant's Form S-8 (File
           No. 33-37855).
10(l)      Potash Corporation of Saskatchewan Inc. Stock Option Plan -- Officers
           and Key Employees, incorporated by reference to Amendment No. 5.
10(m)      Short Term Incentive Plan of the registrant, effective January 1, 1995.
10(n)      Long-Term Incentive Plan of the registrant, as amended December 15,
           1995, incorporated by reference to the Form 10-K.
10(o)      Resolution and Forms of Agreement for Supplemental Retirement Income
           Plan, for officers and key employees of the registrant, incorporated by
           reference to the Form 10-K.
10(p)      Forms of Agreement dated December 30, 1994, between the registrant and
           certain officers of the registrant, concerning a change in control of
           the registrant, incorporated by reference to the Form 10-K.
10(q)      Form of Agreement of Indemnification dated August 8, 1995, between the
           registrant and certain officers and directors of the registrant,
           incorporated by reference to the Form 10-K.
10(r)      Deferred Compensation Plan, for certain officers of PCS Phosphate
           Company, Inc, incorporated by reference to the Form 10-K.
10(s)      Supplemental Retirement Benefits Plan, for eligible employees of PCS
           Phosphate Company, Inc., incorporated by reference to the Form 10-K.
10(t)      Second Amended and Restated Membership Agreement dated January 1, 1995,
           among Phosphate Chemicals Export Association, Inc. and members of such
           association, including Texasgulf Inc. (now PCS Phosphate Company,
           Inc.), incorporated by reference to the Form 10-K.
10(u)      International Agency Agreement dated January 1, 1995, between Phosphate
           Chemicals Export Association, Inc. and Texasgulf Inc. (now PCS
           Phosphate Company, Inc.) establishing Texasgulf Inc. as exclusive
           marketing agent for such association's wet phosphatic materials,
           incorporated by reference to the Form 10-K.
10(v)      General Partnership Agreement forming Albright & Wilson Company, dated
           July 29, 1988 and amended January 31, 1995, between Texasgulf Inc. (now
           PCS Phosphate Company, Inc.) and Albright & Wilson Americas, Inc.,
           incorporated by reference to the Form 10-K.
</TABLE>
 
                                       19
<PAGE>   21
 
<TABLE>
<CAPTION>
EXHIBIT
NUMBER                             DESCRIPTION OF DOCUMENT
- ------     -----------------------------------------------------------------------
<S>        <C>                                                                      <C>
10(w)      Royalty Agreement dated October 7, 1993, by and between the registrant
           and Rio Algom Limited, incorporated by reference to the Form 10-K.
10(x)      Amending Resolution and revised forms of agreement regarding
           Supplemental Retirement Income Plan of the registrant, incorporated by
           reference to the registrant's report on Form 10-Q for the quarterly
           period ended June 30, 1996 (the "Second Quarter Form 10-Q").
10(y)      Employment Agreement dated May 16, 1996, by and between PCS Phosphate
           Company, Inc. and Thomas J. Wright, incorporated by reference to the
           Second Quarter Form 10-Q.
10(z)      Shareholders Rights Agreement dated November 10, 1994, as amended on
           March 28, 1995, and May 4, 1995, and approved by shareholders on May
           11, 1995, incorporated by reference to the Form 10-K.
11         Statement re Computation of Per Share Earnings.
27         Financial Data Schedule.
</TABLE>
 
                                       20

<PAGE>   1
 



                                 Exhibit 2(a)


 
                          AGREEMENT AND PLAN OF MERGER

 
                                  BY AND AMONG

 
                    POTASH CORPORATION OF SASKATCHEWAN INC.,

 
                              ARCADIAN CORPORATION

 
                                      AND

 
                               PCS NITROGEN, INC.

 

                               SEPTEMBER 2, 1996
<PAGE>   2
 
                          AGREEMENT AND PLAN OF MERGER
 
     This Agreement and Plan of Merger (the "Agreement"), dated as of September
2, 1996, is by and among Potash Corporation of Saskatchewan Inc., a Saskatchewan
corporation ("PCS"), Arcadian Corporation, a Delaware corporation ("Arcadian"),
and PCS Nitrogen, Inc., a Delaware corporation and a wholly-owned subsidiary of
PCS ("Merger Sub").
 
                              W I T N E S S E T H
 
     WHEREAS, the Boards of Directors of PCS and Arcadian have deemed that it is
advisable and in the best interests of the security holders of PCS and Arcadian,
respectively, that PCS acquire Arcadian pursuant to the merger of Arcadian with
and into Merger Sub as set forth herein; and
 
     WHEREAS, in connection with the Merger described herein, Arcadian will
exercise the "Common Conversion Option" set forth in the Certificate of
Designation (the "Certificate of Designation") creating Arcadian's Mandatorily
Convertible Preferred Stock, Series A ("Arcadian Preferred Stock"), so that (a)
all shares of Arcadian Preferred Stock outstanding immediately prior to the
Merger will be converted into shares of Arcadian Common Stock immediately prior
to the Merger as provided in the Certificate of Designation, and (b) all such
shares of Arcadian Common Stock resulting from such conversion of the Arcadian
Preferred Stock will be treated in the Merger identically to all other shares of
Arcadian Common Stock outstanding immediately prior to the Merger; and
 
     WHEREAS, the parties hereto intend that the merger of Arcadian with and
into Merger Sub shall be accomplished in a manner that will qualify as a
reorganization under Section 368(a)(2)(D) of the Internal Revenue Code of 1986,
as amended (the "Code").
 
     NOW, THEREFORE, in consideration of the foregoing and the agreements and
conditions specified in this Agreement, the parties hereto agree as follows:
 
                                   ARTICLE 1
 
                                   THE MERGER
 
     SECTION 1.01. The Merger. (a) At the Effective Time, Arcadian shall be
merged (the "Merger") with and into Merger Sub in accordance with the provisions
of the General Corporation Law of the State of Delaware, as amended ("Delaware
Law"), whereupon the separate existence of Arcadian shall cease, and Merger Sub
shall be the surviving corporation (the "Surviving Corporation"). From and after
the Effective Time, the Surviving Corporation shall possess all the rights,
privileges, powers and franchises and be subject to all of the restrictions,
disabilities and duties of Arcadian and Merger Sub, all as provided under
Delaware Law.
 
     (b) Pursuant to the Merger, at the Effective Time:
 
          (i) each share of Arcadian Common Stock outstanding immediately prior
     to the Effective Time shall, except as otherwise provided in Section
     1.01(b)(ii), Section 1.05, Section 1.08, or Section 1.09, be converted into
     cash equal to the Per Share Cash Amount and that fraction of a share of PCS
     Common Stock equal to the Per Share Stock Amount;
 
          (ii) each share of Arcadian Common Stock held by Arcadian or any
     Subsidiary of Arcadian or owned by PCS or any Subsidiary of PCS immediately
     prior to the Effective Time shall be canceled, and no payment shall be made
     with respect thereto;
 
          (iii) each share of common stock of Merger Sub outstanding immediately
     prior to the Effective Time shall be converted into and become one share of
     common stock of the Surviving Corporation with the same rights, powers and
     privileges as the shares so converted and shall constitute the only
     outstanding share of capital stock of the Surviving Corporation; except for
     such additional common stock as will be issued to PCS by Surviving
     Corporation in consideration of PCS agreeing to deliver the Merger Shares
     to the Exchange Agent. The share certificates evidencing the common stock
     of Merger Sub shall be canceled and a new share certificate of the
     Surviving Corporation shall be issued to PCS.
 
                                       I-1
<PAGE>   3
 
          (iv) for purposes hereof, the term "Per Share Cash Amount" shall mean
     $12.25; the term "Per Share Stock Amount" shall mean the number of shares
     (or a fraction thereof) of PCS Common Stock (expressed as a decimal and
     with the result rounded up or down to the nearest one one-thousandth,
     0.0005 being rounded up to 0.001) equal to:
 
             (A) if the Final PCS Common Stock Price is at least $72.00 but not
        greater than $83.25, then 0.17713;
 
             (B) if the Final PCS Common Stock Price is less than $72.00, then
        the lesser of (1) 0.19615 and (2) the quotient of (x) $12.75 divided by
        (y) the Final PCS Common Stock Price; and
 
             (C) if the Final PCS Common Stock Price is greater than $83.25,
        then the greater of (1) 0.16389 and (2) the quotient of (x) $14.75
        divided by (y) the Final PCS Common Stock Price;
 
          (v) for purposes hereof, the term "Final PCS Common Stock Price" shall
     mean the quotient obtained by dividing (A) the sum of the averages of the
     daily high and low trading prices of the PCS Common Stock on the New York
     Stock Exchange (the "NYSE") for each trading day during the Valuation
     Period by (B) the number of trading days in the Valuation Period; the term
     "Valuation Period" shall mean the 20 consecutive days on which shares of
     PCS Common Stock are traded on the NYSE ending on the second business day
     immediately prior to the anticipated Effective Time; and the term
     "Determination Date" shall mean the last day of the Valuation Period; and
 
          (vi) for purposes hereof, the term "dollars" and the symbol "$" shall
     both mean United States dollars.
 
     SECTION 1.02. Exchange Agent; Payment of Merger Consideration.
 
     (a) As soon as reasonably practicable after the Effective Time, and subject
to the provisions of Section 1.09, (i) PCS shall deposit or cause to be
deposited with ChaseMellon Shareholder Services, L.L.C. or such other
institution as may be designated by PCS, as exchange agent (including any
co-exchange agent, the "Exchange Agent"), for the benefit of the holders of
Arcadian Common Stock (collectively, the "Holders"), certificates representing
the number of whole shares of PCS Common Stock (collectively, the "Merger
Shares") to which each Holder has become entitled pursuant to Section 1.01, and
(ii) Merger Sub shall deposit (A) cash equal to the aggregate Per Share Cash
Amount to which the Holders have become entitled pursuant to Section 1.01 (the
"Merger Cash"), and (B) the cash to which the Holders are entitled as provided
in Section 1.05 (the Merger Shares, the Merger Cash and any cash to which a
Holder is entitled as provided in Section 1.05 together being the "Merger
Consideration"). In consideration of PCS agreeing to deliver the Merger Shares
to the Exchange Agent, Surviving Corporation shall issue to PCS common stock of
Surviving Corporation having a value equal to the Merger Shares.
 
     (b) As soon as reasonably practicable after the Effective Time, and in any
event within 30 days after the Effective Time, the Exchange Agent shall mail to
each Holder of record as of the Effective Time, a form of letter of transmittal
and instructions for use in effecting the surrender of the certificates
representing Arcadian Common Stock or Arcadian Preferred Stock, as the case may
be (each such certificate, an "Old Certificate"), in exchange for the Merger
Consideration. Upon the proper delivery and surrender to the Exchange Agent of
an Old Certificate, together with a duly completed and executed letter of
transmittal, the record holder of such Old Certificate shall be entitled to
receive, and the Exchange Agent (pursuant to irrevocable instructions from PCS)
shall deliver to such record holder, in exchange therefor, subject to Section
1.09, (i) a certificate representing the Merger Shares to which such Holder
shall have become entitled pursuant to Section 1.01, (ii) the Merger Cash to
which such Holder shall have become entitled pursuant to Section 1.01, and (iii)
if applicable, cash in lieu of fractional shares as provided in Section 1.05.
Any Old Certificate delivered to the Exchange Agent with a duly completed and
executed letter of transmittal shall forthwith be canceled. Until so delivered,
each Old Certificate shall, after the Effective Time, represent for all purposes
only the right to receive the Merger Consideration as set forth in this
Agreement. No interest will be paid or will accrue on any portion of the Merger
Consideration payable on the surrender of an Old Certificate. Any Holder whose
Old Certificate has been lost or destroyed may nevertheless obtain the Merger
Consideration into which the
 
                                       I-2
<PAGE>   4
 
Arcadian Common Stock, represented by such lost Old Certificate would have been
converted pursuant to Section 1.01, provided such Holder delivers to PCS and the
Exchange Agent a statement certifying such loss or destruction and providing for
indemnity reasonably satisfactory to PCS and the Exchange Agent against any loss
or expense either of them may incur as a result of such lost or destroyed Old
Certificate being thereafter surrendered to the Exchange Agent or PCS. In the
event of a transfer of ownership of any Arcadian Common Stock which is not
registered in the transfer records of Arcadian, the Merger Consideration may be
delivered to a transferee if the Old Certificate representing such Arcadian
Common Stock so transferred is presented to the Exchange Agent, accompanied by
all documents required to evidence and effect such transfer and by evidence that
any applicable transfer taxes have been paid or are not payable.
 
     (c) No dividends payable with respect to any Merger Shares shall be paid to
persons entitled to receive such Merger Shares until such persons have
surrendered their Old Certificates (or certification with respect to lost or
destroyed Old Certificates) to the Exchange Agent in accordance with Section
1.02(b). After such surrender, there shall be paid to the person in whose name
the Merger Shares shall be issued any dividends on such Merger Shares that have
a record date prior to such surrender. If the payment date for such dividend is
after the date of such surrender, payment shall be made on such payment date. In
no event will any person entitled to receive Merger Shares be entitled to
interest on any dividend declared with respect to Merger Shares.
 
     (d) Any of the Old Certificates, and any certification with respect to lost
or destroyed Old Certificates, that have not been surrendered or delivered to
the Exchange Agent within six months after the Effective Time may be delivered
to PCS, and any Holder who has not theretofore complied with Section 1.02(b)
shall thereafter look only to PCS for payment of the Merger Consideration.
Notwithstanding the foregoing, neither the Exchange Agent nor any party hereto
shall be liable for any cash or securities delivered to a public official
pursuant to applicable abandoned property, escheat or similar laws.
 
     (e) All deliveries and payments in respect of Arcadian Common Stock that
are made in accordance with the terms hereof shall be deemed to have been made
in full satisfaction of all rights pertaining to such securities, except as may
be otherwise required by law.
 
     SECTION 1.03. Transfers after the Effective Time. No transfers of Arcadian
Common Stock or Arcadian Preferred Stock shall be made on the transfer books of
the Surviving Corporation at or after the Effective Time.
 
     SECTION 1.04. Withholding. PCS shall be entitled to deduct and withhold
from the consideration otherwise payable pursuant to this Agreement to any
Holder such amounts as PCS may be required to deduct and withhold with respect
to the making of such payment under the Code or any provision of state, local or
foreign tax law. To the extent that such amounts are so withheld by PCS, such
withheld amounts shall be treated for all purposes of this Agreement as having
been paid to the Holder in respect of whom such deduction and withholding were
made.
 
     SECTION 1.05. Fractional Shares. No fractional shares of PCS Common Stock
shall be issued in connection with the Merger, but in lieu thereof each holder
of Arcadian Common Stock otherwise entitled to a fractional share of PCS Common
Stock (considering all Old Certificates held of record by such holder together)
will be entitled to receive a cash payment (rounded up or down to the nearest
$.01, $.005 being rounded up to $.01) in an amount equal to such fractional part
of a share of PCS Common Stock multiplied by the Final PCS Common Stock Price.
 
     SECTION 1.06. Options, SARs, CESARs and Restricted Stock. (a) As soon as
reasonably practicable after receiving written instructions from PCS and before
the Effective Time, Arcadian shall take all necessary and appropriate actions to
implement the provisions of clause (1) or (3) of Section 6(j) of Arcadian's
Stock Option Plan, as amended (the "Option Plan"), with respect to the
outstanding options to purchase shares of Arcadian Common Stock (the "Options")
granted under the Option Plan. Arcadian and PCS understand and agree that
subject to certain conditions set forth in the Option Plan, (i) said clause (1)
of Section 6(j) permits Arcadian to accelerate the time at which the then
outstanding Options may be exercised in full for a limited period of time on or
before a specified date (which, in the case of the Merger, will permit the
holders of the
 
                                       I-3
<PAGE>   5
 
Options (the "Optionees") to participate in the Merger with the shares of
Arcadian Common Stock received upon the exercise of such Options) to be fixed by
the Committee (as defined in the Option Plan), after which specified date all
unexercised Options and all rights of the Optionees thereunder shall terminate,
and (ii) said clause (3) permits Arcadian to require the mandatory surrender to
Arcadian of the then outstanding Options, as of a date before or not later than
sixty (60) days after the Effective Time as specified by the Committee, in which
event such Options shall be canceled and Arcadian shall pay to each Optionee an
amount of cash equal to the excess of the fair market value (as determined in
accordance with the Option Plan) of the aggregate shares of Arcadian Common
Stock subject to such Option over the aggregate option price of such shares.
 
     (b) As soon as reasonably practicable before the Effective Time, Arcadian
shall take all necessary and appropriate actions to further amend Arcadian's
Stock Appreciation Rights Plan, as amended (the "SAR Plan"), to provide that at
the Effective Time, each stock appreciation right unit granted under the SAR
Plan ("SAR") that is outstanding immediately prior to the Effective Time shall
be converted into (i) cash equal to the Per Share Cash Amount less the
applicable Award Price (as set forth in the applicable SAR agreement) of such
SAR and (ii) a fraction of a share of PCS Common Stock equal to the Per Share
Stock Amount or cash of equal value.
 
     (c) As soon as reasonably practicable before the Effective Time, Arcadian
shall take all necessary and appropriate actions to amend Arcadian's Cash
Equivalent Stock Appreciation Rights Plan (the "CESAR Plan") to provide that at
the Effective Time, each cash equivalent stock appreciation right unit granted
under the CESAR Plan ("CESAR") that is outstanding immediately prior to the
Effective Time shall be converted into (i) cash equal to the Per Share Cash
Amount less $6.67 and (ii) a fraction of a share of PCS Common Stock equal to
the Per Share Stock Amount or cash of equal value.
 
     (d) Immediately prior to the Effective Time, all restrictions relating to
all shares of Arcadian Common Stock theretofore granted pursuant to Arcadian's
Restricted Stock Plan (the "Restricted Stock Plan") shall lapse, and all
conditions to the holders' receipt of such shares free of any such restrictions
shall be deemed satisfied. At the Effective Time, each share of Arcadian Common
Stock theretofore granted pursuant to the Restricted Stock Plan shall be
converted into the Merger Consideration pursuant to Section 1.01(b).
 
     SECTION 1.07. Certain Adjustments. If at any time during the period between
the date of this Agreement and the Effective Time, any change in the outstanding
shares of capital stock of Arcadian shall occur, including by reason of any
reclassification, recapitalization, stock split or combination, exchange or
readjustment of shares, or any stock dividend thereon with a record date during
such period, the Merger Consideration shall be appropriately adjusted; provided,
however, that none of (a) the exercise between the date of this Agreement and
the Effective Time of Stock Options outstanding on the date of this Agreement,
(b) the issuance of shares of Arcadian Common Stock pursuant to the Restricted
Stock Plan, (c) the conversion of shares of Arcadian Preferred Stock in or at
any time prior the Merger, shall require any such adjustment.
 
     SECTION 1.08. Dissenting Shares. Notwithstanding any of the foregoing
provisions of this Article 1, shares of Arcadian Common Stock and Arcadian
Preferred Stock outstanding immediately prior to the Effective Time and held by
a Holder who has not voted in favor of the Merger or consented thereto in
writing and who has demanded appraisal for such shares in accordance with
Delaware Law shall not be converted into a right to receive the Merger
Consideration, unless such Holder fails to perfect or withdraws or otherwise
loses his right to appraisal. If after the Effective Time such holder fails to
perfect or withdraws or loses his or her right to appraisal, such shares of
Arcadian Common Stock shall be treated as if they had been converted as of the
Effective Time into a right to receive the Merger Consideration. Arcadian shall
give PCS prompt notice of any demands received by Arcadian for appraisal of
shares of Arcadian Common Stock or Arcadian Preferred Stock, and PCS shall have
the right to participate in all negotiations and proceedings with respect to
such demands.
 
     SECTION 1.09. Cash/Stock Adjustment. In the event that holders of Arcadian
Common Stock, in the aggregate, would not receive PCS Common Stock in the Merger
without the adjustment described herein, in an amount representing at least
47.94% of the Total Consideration, then the Per Share Stock Amount shall be
increased and the Per Share Cash Amount shall be decreased by the same dollar
value, so that at least 47.94% of the Total Consideration is represented by PCS
Common Stock. As used herein, the term "Total
 
                                       I-4
<PAGE>   6
 
Consideration" means the sum of (a) the aggregate Merger Consideration (but
excluding the value of shares of Arcadian Common Stock as to which appraisal
rights have been demanded and not waived or otherwise lost), (b) the value of
the shares of Arcadian Common Stock as to which appraisal rights have been
demanded and not waived or otherwise lost, and (c) any amount paid in redemption
of Arcadian Common Stock and Arcadian Preferred Stock, other than redemptions
undertaken in the ordinary course of business and not in contemplation of the
Merger, within one year prior to the effective date of the Merger. Solely for
purposes of the foregoing computation, shares of PCS Common Stock to be received
by any Five Percent Holder (other than any Five Percent Holder who has delivered
to Arcadian a statement satisfactory to Arcadian to the effect that such Five
Percent Holder then has no intention to dispose of the shares of PCS Common
Stock to be received by such Five Percent Holder in the Merger for a period of
two years after the effective date of the Merger) shall be considered to be
cash, and shall not be considered to be shares of PCS Common Stock. As used
herein, the term "Five Percent Holder" means any stockholder of Arcadian who,
immediately prior to the Effective Time, is the owner of five percent or more of
(a) the aggregate number of shares of Arcadian Common Stock then outstanding
plus (b) the aggregate number of shares of Arcadian Common Stock into which the
Arcadian Preferred Stock then outstanding will be converted immediately prior to
the Merger pursuant to Arcadian's exercise of the Common Conversion Option.
 
                                   ARTICLE 2
 
                           THE SURVIVING CORPORATION
 
     SECTION 2.01. The Surviving Corporation. (a) The certificate of
incorporation of Merger Sub in effect at the Effective Time shall be the
certificate of incorporation of the Surviving Corporation until amended in
accordance with applicable law.
 
     (b) The bylaws of Merger Sub in effect at the Effective Time shall be the
bylaws of the Surviving Corporation until amended in accordance with applicable
law.
 
     (c) From and after the Effective Time, until successors are duly elected or
appointed and qualified in accordance with applicable law, (i) the directors of
Merger Sub at the Effective Time shall be the directors of the Surviving
Corporation, and (ii) the officers of Merger Sub at the Effective Time shall be
the officers of the Surviving Corporation.
 
                                   ARTICLE 3
 
                      STOCKHOLDER APPROVAL; EFFECTIVE TIME
 
     SECTION 3.01. Stockholder Approval. Subject to the terms and conditions
contained herein, this Agreement and the transactions contemplated hereby, shall
be submitted for approval to the holders of shares of Arcadian Common Stock and
Arcadian Preferred Stock at a meeting to be duly held for such purpose by
Arcadian (the "Special Meeting"). PCS and Arcadian shall coordinate and
cooperate with respect to the timing of such meeting and shall endeavor to hold
such meeting as soon as practicable after the date hereof. Arcadian's Board of
Directors shall recommend unanimously that its stockholders approve and adopt
this Agreement and the transactions contemplated hereby and such recommendation
shall be contained in the Proxy Statement; provided that nothing herein shall
prevent the Board of Directors of Arcadian from withdrawing or modifying this
recommendation if, in the good faith judgment of such Board of Directors after
consultation with legal counsel and financial advisors, such Board's fiduciary
duties require such withdrawal or modification.
 
     SECTION 3.02. Effective Time. On the first business day on or after both
(a) this Agreement has been duly approved by the requisite vote of the holders
of shares of Arcadian Common Stock and Arcadian Preferred Stock and (b) the
closing of the Merger shall have occurred, a Certificate of Merger relating to
the Merger (the "Certificate of Merger"), specifying that the Merger shall
become effective at such date and time as are specified therein, shall be filed
in accordance with Delaware Law, and the Merger shall become
 
                                       I-5
<PAGE>   7
 
effective in accordance with the terms of the Certificate of Merger (such time
and date are referred to as the "Effective Time").
 
                                   ARTICLE 4
 
                         REPRESENTATIONS AND WARRANTIES
                             OF PCS AND MERGER SUB
 
     PCS and Merger Sub jointly and severally represent and warrant to Arcadian
as follows:
 
     SECTION 4.01. Organization, Standing and Power. (a) Each of PCS and its
Subsidiaries is a corporation or partnership duly organized, validly existing
and in good standing under the laws of its jurisdiction of organization and has
all requisite power and authority to carry on its business as now conducted.
Each of PCS and its Subsidiaries is duly qualified to do business and is in good
standing in each jurisdiction in which the business it is conducting, or the
operation, ownership or leasing of its properties, makes such qualification
necessary, other than in such jurisdictions where the failure to so qualify
would not, individually or in the aggregate, have a Material Adverse Effect on
PCS. PCS has furnished to Arcadian complete and correct copies of its charter
documents and By-laws.
 
     (b) As used in this Agreement:
 
          (i) "Subsidiary" means, as to any Person, any corporation or other
     entity of which securities or other ownership interests having ordinary
     voting power to elect a majority of the board of directors or other persons
     performing similar functions are at the time directly or indirectly owned
     by such Person;
 
          (ii) "Person" means an individual, corporation, limited liability
     company, partnership, association, trust or other entity or organization,
     including a government or political subdivision or an agency or
     instrumentality thereof; and
 
          (iii) "Material Adverse Effect" means, as to any Person, a material
     adverse effect on the business, assets, condition (financial or otherwise)
     or results of operations of such Person and its Subsidiaries, taken as a
     whole, which effect shall be measured net of, and only after giving the
     Person the benefit of, any payments under any insurance, indemnity,
     reimbursement, contribution, compensation or other similar rights which
     reduce, offset, compensate or otherwise limit the impact thereof on the
     Person and its Subsidiaries.
 
          (iv) "SBCA" means The Business Corporations Act (Saskatchewan).
 
          (v) "Canadian Securities Laws" means the SBCA, the Securities Act,
     1988 (Saskatchewan) and the equivalent legislation in the other provinces
     of Canada, all as now enacted or as the same may from time to time be
     amended, re-enacted or replaced, and the applicable rules, regulations,
     rulings, orders and forms made or promulgated under such statutes and the
     published policies of the regulatory authorities administering such
     statutes, as well as the rules, regulations, bylaws and policies of the
     Montreal Exchange and The Toronto Stock Exchange.
 
     SECTION 4.02. Corporate Authorization. The execution, delivery and
performance by PCS and Merger Sub of this Agreement and the consummation by PCS
and Merger Sub of the transactions contemplated hereby are within their
corporate powers and have been duly authorized by all necessary corporate
action. Without limiting the generality of the foregoing, the Board of Directors
(or the Executive Committee) of PCS and the Board of Directors of Merger Sub
have unanimously adopted resolutions adopting and approving this Agreement, the
transaction contemplated hereby and the Merger. No vote of any class or series
of PCS's capital stock is necessary to approve and adopt this Agreement and the
transactions contemplated hereby. PCS, as sole stockholder of Merger Sub, has
approved and adopted this Agreement and the transactions contemplated hereby,
including the Merger. This Agreement has been duly executed and delivered by PCS
and Merger Sub and constitutes the valid and binding agreements of PCS and
Merger Sub, enforceable against PCS and Merger Sub in accordance with its terms,
subject to (a) bankruptcy, insolvency, moratorium
 
                                       I-6
<PAGE>   8
 
and other similar laws now or hereafter in effect relating to or affecting
creditors' rights generally and (b) general principles of equity (regardless of
whether considered in a proceeding at law or in equity).
 
     SECTION 4.03. Governmental Authorization. The execution, delivery and
performance by PCS and Merger Sub of this Agreement and the consummation of the
Merger by PCS and Merger Sub require no action by or in respect of, or filing
with, any governmental body, agency, official or authority other than (a) the
filing of a Certificate of Merger in accordance with Delaware Law, (b)
compliance with any applicable requirements of the Hart-Scott-Rodino Antitrust
Improvements Act of 1976, as amended (the "HSR Act"), (c) compliance with any
applicable requirements of the Canadian Securities Laws, the Securities Act and
of the Securities Exchange Act of 1934, as amended, and the rules and
regulations promulgated thereunder (the "Exchange Act"), (d) approval of the
NYSE, (e) blue sky filings, and (f) applicable environmental protection
clearances.
 
     SECTION 4.04. Non-Contravention. Except as previously disclosed in writing
to Arcadian or as disclosed in any of the PCS Disclosure Documents, the
execution, delivery and performance by PCS and Merger Sub of this Agreement and
the consummation by PCS and Merger Sub of the transactions contemplated hereby
do not and will not (a) contravene or conflict with the charter documents or
By-laws of PCS or Merger Sub, (b) assuming compliance with the matters referred
to in Section 4.03, contravene or conflict with or constitute a violation of any
provision of any law, regulation, judgment, injunction, order or decree binding
upon or applicable to PCS or any of its Subsidiaries, (c) constitute a default
(or an event which with notice, the lapse of time or both would become a
default) under or give rise to a right of termination, cancellation or
acceleration of any right or obligation to which PCS or any of its Subsidiaries
is entitled under any provision of any agreement, contract or other instrument
binding upon PCS or any of its Subsidiaries, or (d) result in the creation or
imposition of any Lien on any asset of PCS or any of its Subsidiaries, except
for such contraventions, conflicts or violations referred to in clause (b) or
defaults or rights of termination, cancellation or acceleration referred to in
clause (c) or creations or impositions of any Lien referred to in clause (d)
that would not, individually or in the aggregate, have a Material Adverse Effect
on PCS. For purposes of this Agreement, "Lien" means, with respect to any asset,
any mortgage, lien, pledge, charge, security interest or encumbrance of any kind
in respect of such asset.
 
     SECTION 4.05. Capitalization. (a) As of the date hereof, the authorized
capital stock of PCS consists of an unlimited number of common shares without
par value (the "PCS Common Stock"), and an unlimited number of preferred shares,
issuable in series without par value. At the close of business on July 31, 1996,
(i) 45,544, 896 shares of PCS Common Stock were issued and outstanding, (ii)
1,288,325 shares of PCS Common Stock were reserved for issuance pursuant to
options issued by PCS, and (iii) no preferred shares were issued or outstanding.
All outstanding shares of capital stock of PCS have been validly issued and are
fully paid and nonassessable. Except for the options referred to above, and
shares to be issued under PCS's Dividend Reinvestment Plan (the "PCS DRIP"), as
of the date hereof, there are no options, warrants, calls, rights, commitments
or agreements to which PCS or any of its Subsidiaries is a party or by which it
is bound, obligating PCS or any of its Subsidiaries to issue, deliver, sell,
purchase, redeem or acquire, or cause to be issued, delivered, sold, purchased,
redeemed or acquired, additional shares of capital stock or other voting
securities of PCS or any of its Subsidiaries or obligating PCS or any of its
Subsidiaries to grant, extend or enter into any such option, warrant, call,
right, commitment or agreement.
 
     (b) Except as disclosed in any of the PCS Disclosure Documents, all of the
outstanding capital stock of, or other ownership interests in, each Subsidiary
of PCS is owned by PCS, directly or indirectly, free and clear of any Lien and
free of any other limitation or restriction (including any restriction on the
right to vote, sell or otherwise dispose of such capital stock or other
ownership interests).
 
     SECTION 4.06. Disclosure Documents. PCS has previously furnished to
Arcadian true and complete copies of:
 
          (a) PCS Annual Reports to Shareholders for each of the years ended
     December 31, 1993 through 1995;
 
                                       I-7
<PAGE>   9
 
          (b) PCS Annual Reports on Form 10-K or Annual Information Forms for
     each of the years ended December 31, 1993 through 1995;
 
          (c) PCS Quarterly Financial Statements for the quarters ended March 31
     and June 30, 1996 and Reports on Form 10-Q furnished in respect of such
     periods;
 
          (d) each definitive proxy statement of PCS since December 31, 1993;
 
          (e) each final prospectus filed by PCS since December 31, 1993; and
 
          (f) all Material Change Reports filed by PCS since December 31, 1995.
 
     As of their respective dates, such reports, proxy statements and
prospectuses (collectively, the "PCS Disclosure Documents") (i) complied as to
form in all material respects with the applicable requirements of the Canadian
Securities Laws and, to the extent applicable, the Securities Act and the
Exchange Act, and (ii) did not contain any untrue statement of a material fact
or omit to state a material fact required to be stated therein or necessary to
make the statements therein, in light of the circumstances under which they were
made, not misleading. The audited consolidated financial statements and
unaudited consolidated interim financial statements included in the PCS
Disclosure Documents (including any related notes and schedules) fairly present
the financial position of PCS and its consolidated Subsidiaries as of the dates
thereof and the results of operations and cash flows for the periods or as of
the dates then ended (subject, where appropriate, to normal year-end
adjustments), in each case in accordance with past practice and generally
accepted accounting principles in Canada ("Canadian GAAP") consistently applied
during the periods involved (except as otherwise disclosed in the notes
thereto). Since December 31, 1993, PCS has timely filed all reports,
registration statements and other filings required to be filed by it under the
applicable requirements of the Canadian Securities Laws.
 
     SECTION 4.07. Compliance with Laws. The businesses of PCS and its
Subsidiaries are not being conducted in violation of any law, ordinance or
regulation of any governmental entity (provided that no representation or
warranty is made in this Section 4.07 with respect to Environmental Laws),
except as disclosed in any of the PCS Disclosure Documents and except for such
violations as would not, individually or in the aggregate, have a Material
Adverse Effect on PCS.
 
     SECTION 4.08. No Undisclosed Liabilities. As of June 30, 1996, neither PCS
nor any of its Subsidiaries had any liabilities or obligations of any nature,
whether or not accrued, contingent or otherwise, that would be required by
Canadian GAAP to be reflected on a consolidated balance sheet of PCS and its
Subsidiaries (including the notes thereto), except (a) liabilities or
obligations reflected in any of the PCS Disclosure Documents and (b) liabilities
or obligations which would not, individually or in the aggregate, have a
Material Adverse Effect on PCS.
 
     SECTION 4.09. Litigation. Except as previously disclosed in writing to
Arcadian or as disclosed in any of the PCS Disclosure Documents, there is no (i)
class action litigation pending or, to the best knowledge of PCS, threatened
against or affecting PCS or any of its Subsidiaries, (ii) other suit, action or
proceeding pending or, to the best knowledge of PCS, threatened against or
affecting PCS or any of its Subsidiaries that is reasonably likely to have a
Material Adverse Effect on PCS, or (iii) judgment, decree, injunction, or, to
the best knowledge of PCS, any rule or order of any governmental entity or
arbitrator outstanding against PCS or any of its Subsidiaries, that is
reasonably likely to have a Material Adverse Effect on PCS.
 
     SECTION 4.10. Environmental Matters. Except as previously disclosed in
writing to Arcadian, as described in the PCS Disclosure Documents, (a) PCS and
each of its Subsidiaries are in material compliance with all applicable federal,
state, provincial, local and foreign laws, regulations, rules, common law,
orders, decrees, ordinances, treaties, judicial and administrative decisions,
judgments, injunctions, consent agreements, permits and governmental
restrictions relating to pollution or protection of human health and safety or
the environment (including, without limitation, ambient air, surface water,
ground water, land surface and subsurface strata) (collectively, "Environmental
Laws"), except for non-compliance which would not, individually or in the
aggregate, have a Material Adverse Effect on PCS and, to the best knowledge of
PCS, there are no existing or reasonably foreseeable circumstances, conditions,
events or occurrences that are
 
                                       I-8
<PAGE>   10
 
reasonably likely to materially prevent or interfere with such compliance in the
next three years, (b) PCS and each of its Subsidiaries have obtained and
maintained in effect (or are in the process of obtaining) all permits, licenses,
certificates and other governmental authorizations required under applicable
Environmental Laws ("Environmental Permits") with respect to their properties,
assets, businesses, and operations except where the failure to do so would not
have a Material Adverse Effect on PCS; (c) neither PCS nor any of its
Subsidiaries has received written notice of, or, to the best knowledge of PCS,
is the subject of, any action, cause of action, claim, investigation, demand,
notice, request for information, complaint, suit or proceeding by any Person
alleging liability under or in connection with or non-compliance with any
Environmental Law, including, without limitation, toxic tort, nuisance, trespass
and similar claims (collectively, "Environmental Claim"), which is reasonably
likely to, individually or in the aggregate, have a Material Adverse Effect on
PCS; (d) as of June 30, 1996, neither PCS nor any of its Subsidiaries had any
liabilities or obligations of any nature, whether accrued, contingent or
otherwise, and whether relating to PCS, any of its Subsidiaries or any
predecessor entities of PCS or any of its Subsidiaries, arising under or
relating to any Environmental Law or Environmental Claim, except for liabilities
or obligations which would not, individually or in the aggregate, be reasonably
expected to have a Material Adverse Effect on PCS; and (e) neither PCS nor any
of its Subsidiaries owns, leases or operates or, since January 1, 1986, has
owned, leased or operated, any real property in New Jersey or Connecticut, or
conducts or, since January 1, 1986, has conducted, any operations in New Jersey
or Connecticut.
 
     SECTION 4.11. Proxy Statement; Registration Statement. Neither the Proxy
Statement nor the Registration Statement will, in the case of the Proxy
Statement or any amendments or supplements thereto, at the time of the mailing
of the Proxy Statement or any amendments or supplements thereto, at the time of
the Special Meeting, and at the Effective Time, or, in the case of the
Registration Statement, at the time it becomes effective, contain any untrue
statement of a material fact relating to PCS, its Subsidiaries or the Merger, or
omit to state any material fact required to be stated therein relating to PCS,
its Subsidiaries or the Merger, or necessary in order to make the statements
therein relating to PCS, its Subsidiaries or the Merger, in light of the
circumstances under which they were made, not misleading. The Proxy Statement
will comply as to form in all material respects with the provisions of the
Exchange Act, and the Registration Statement will comply as to form in all
material respects with the provisions of the Securities Act. The letter to
stockholders, notice of meeting, proxy statement/prospectus and forms of proxies
to be distributed to stockholders of Arcadian in connection with the Special
Meeting, and any schedules required to be filed with the SEC in connection
therewith, are collectively referred to herein as the "Proxy Statement".
 
     SECTION 4.12. Absence of Certain Changes. Except as permitted by this
Agreement, as disclosed in any of the PCS Disclosure Documents, or as
specifically permitted by Section 6.18, since June 30, 1996, PCS and its
Subsidiaries have conducted their business in the ordinary course consistent
with past practice and there has not been:
 
          (a) any event, occurrence or facts which has or have had, or is or are
     reasonably expected to have, a Material Adverse Effect on PCS;
 
          (b) any amendment of any term of any outstanding security of PCS or
     any Subsidiary of PCS; or
 
          (c) any change in the capitalization of PCS as described in Section
     4.05, except for the exercise of employee stock options and shares issued
     pursuant to the PCS DRIP.
 
     SECTION 4.13. Liabilities of Merger Sub. Merger Sub has no liabilities or
obligations of any nature, whether accrued, contingent or otherwise, except its
obligations under this Agreement and has conducted no business activities. As of
the date hereof, the authorized capital stock of Merger Sub consists solely of
1,000 shares of Common Stock, no par value, one share of which is outstanding.
All of Merger Sub's issued and outstanding shares of capital stock are duly
authorized, validly issued, fully paid and nonassessable.
 
     SECTION 4.14. Merger-Related Tax Matters. (a) Neither PCS nor, to the
knowledge of PCS, any of its affiliates has taken or agreed to take any action
that would prevent the Merger from constituting a reorganization qualifying
under the provisions of Section 368(a) of the Code.
 
                                       I-9
<PAGE>   11
 
     (b) PCS and Merger Sub will each pay their respective expenses, if any,
incurred in connection with the Merger. Neither PCS nor Merger Sub will pay any
of the expenses of any Arcadian stockholder incurred in connection with the
Merger.
 
     (c) There is no intercorporate indebtedness existing between Arcadian and
PCS or between Arcadian and Merger Sub that was issued, acquired, or will be
settled at a discount.
 
     (d) Neither PCS nor Merger Sub is under the jurisdiction of a court in a
title 11 or similar case within the meaning of Section 368(a)(3)(A) of the Code.
 
     (e) The fair market value of the PCS stock and other consideration received
by each Arcadian stockholder in the Merger will be approximately equal to the
fair market value of the Arcadian stock surrendered in the exchange.
 
     (f) Prior to the Merger, PCS will be in control of Merger Sub within the
meaning of section 368(c)(2) of the Code.
 
     (g) Following the Merger, Surviving Corporation will not issue additional
shares of its stock that would result in PCS losing control of Surviving
Corporation within the meaning of section 368(c) of the Code.
 
     (h) PCS has no present plan or intention to reacquire any of its stock
issued in the Merger.
 
     (i) PCS has no plan or intention to liquidate Surviving Corporation; to
merge Surviving Corporation with and into another corporation in a manner that
would cause the Merger to fail to qualify under Section 368 of the Code; to sell
or otherwise dispose of the stock of Surviving Corporation in a manner that
would cause the Merger to fail to qualify under Section 368 of the Code; or to
cause Surviving Corporation to sell or otherwise dispose of any of the assets of
Arcadian acquired in the Merger, except for dispositions made in the ordinary
course of business or transfers described in section 368(a)(2)(C) of the Code.
 
     (j) Following the Merger, Surviving Corporation will continue the historic
business of Arcadian or use a significant portion of Arcadian's business assets
in a business.
 
     (k) Neither PCS nor Merger Sub is an investment company as defined in
section 368(a)(2)(F)(iii) or (iv) of the Code.
 
     (l) No stock of Merger Sub will be issued in the Merger except as described
herein.
 
     (m) PCS is not aware of any plan or intention by any stockholder of
Arcadian to sell, exchange, transfer by gift or otherwise dispose of any PCS
Common Stock to be received by them in the Merger. In addition, PCS is not aware
of any transfer of Arcadian stock by any Arcadian stockholder prior to the
Merger having been made in contemplation of the Merger.
 
                                   ARTICLE 5
 
                         REPRESENTATIONS AND WARRANTIES
                                  OF ARCADIAN
 
     Arcadian represents and warrants to PCS and Merger Sub as follows:
 
     SECTION 5.01. Organization, Standing and Power. Each of Arcadian and its
Subsidiaries is a corporation or partnership duly organized, validly existing
and in good standing under the laws of its jurisdiction of organization and has
all requisite power and authority to carry on its business as now conducted.
Each of Arcadian and its Subsidiaries is duly qualified to do business and is in
good standing in each jurisdiction in which the business it is conducting, or
the operation, ownership or leasing of its properties, makes such qualification
necessary, other than in such jurisdictions where the failure to so qualify
would not, individually or in the aggregate, have a Material Adverse Effect on
Arcadian. Arcadian has furnished to PCS complete and correct copies of its
Restated Certificate of Incorporation, as amended, and its Amended and Restated
Bylaws.
 
     SECTION 5.02. Corporate Authorization. The execution, delivery and
performance by Arcadian of this Agreement and the consummation by Arcadian of
the transactions contemplated hereby are within Arcadian's
 
                                      I-10
<PAGE>   12
 
corporate powers and, except for approval by Arcadian's stockholders in
connection with the consummation of the Merger, have been duly authorized by all
necessary corporate action. Without limiting the generality of the foregoing,
the Board of Directors of Arcadian has unanimously adopted a resolution adopting
and approving this Agreement. The affirmative vote of a majority of the
outstanding shares of Arcadian Common Stock and Arcadian Preferred Stock
entitled to vote thereon, voting as a single class, is the only vote of any
class or series of Arcadian's capital stock necessary to approve and adopt this
Agreement and the transactions contemplated hereby. This Agreement has been duly
executed and delivered by Arcadian and constitutes a valid and binding agreement
of Arcadian, enforceable against Arcadian in accordance with its terms, subject
to (a) bankruptcy, insolvency, moratorium and other similar laws now or
hereafter in effect relating to or affecting creditors' rights generally and (b)
general principles of equity (regardless of whether considered in a proceeding
at law or in equity).
 
     SECTION 5.03. Governmental Authorization. The execution, delivery and
performance by Arcadian of this Agreement and the consummation of the Merger by
Arcadian require no action by or in respect of, or filing with, any governmental
body, agency, official or authority other than (a) the filing of a Certificate
of Merger in accordance with Delaware Law; (b) compliance with any applicable
requirements of the HSR Act; (c) compliance with any applicable requirements of
the Securities Act and the Exchange Act; and (d) compliance with any applicable
requirements of Environmental Law relating to Environmental Permits and any
other applicable environmental protection clearances.
 
     SECTION 5.04. Non-Contravention. Except as previously disclosed in writing
to PCS or as disclosed in any of the Arcadian SEC Documents, the execution,
delivery and performance by Arcadian of this Agreement and the consummation by
Arcadian of the transactions contemplated hereby do not and will not (a)
contravene or conflict with the Restated Certificate of Incorporation, as
amended, or the Amended and Restated Bylaws of Arcadian, (b) assuming compliance
with the matters referred to in Section 5.03, contravene or conflict with or
constitute a violation of any provision of any law, ordinance, regulation,
judgment, injunction, order or decree binding upon or applicable to Arcadian or
any of its Subsidiaries, (c) constitute a default (or an event which with
notice, the lapse of time or both would become a default) under or give rise to
a right of termination, cancellation or acceleration of any right or obligation
to which Arcadian or any of its Subsidiaries is entitled under any provision of
any agreement, contract or other instrument binding upon Arcadian or any of its
Subsidiaries, or (d) result in the creation or imposition of any Lien on any
asset of Arcadian or any of its Subsidiaries, except for such contraventions,
conflicts or violations referred to in clause (b) or defaults or rights of
termination, cancellation or acceleration referred to in clause (c) or creations
or impositions of any Lien referred to in clause (d) that would not,
individually or in the aggregate, have a Material Adverse Effect on Arcadian.
 
     SECTION 5.05. Capitalization. (a) As of the date hereof, the authorized
capital stock of Arcadian consists of 150,000,000 shares of common stock, par
value $0.01 per share (the "Arcadian Common Stock"), and 50,000,000 shares of
preferred stock, par value $0.01 per share. At the close of business on August
29, 1996, (i) 38,540,261 shares of Arcadian Common Stock were issued and
outstanding, (ii) 7,680,640 shares of Arcadian Common Stock were reserved for
issuance pursuant to options granted or available for grant by Arcadian,
warrants issued by Arcadian, pursuant to the Restricted Stock Plan, and upon
conversion of the Arcadian Preferred Stock, and (iii) 5,534,157 shares of
Arcadian Preferred Stock were issued and outstanding and 12,593 shares of
Arcadian Preferred Stock were reserved for issuance. All outstanding shares of
capital stock of Arcadian have been validly issued and are fully paid and
nonassessable. Except as set forth above, as of the date hereof, there are no
options, warrants, calls, rights, commitments or agreements to which Arcadian or
any of its Subsidiaries is a party or by which it is bound, obligating Arcadian
or any of its Subsidiaries to issue, deliver, sell, purchase, redeem or acquire,
or cause to be issued, delivered, sold, purchased, redeemed or acquired,
additional shares of capital stock or other voting securities of Arcadian or any
of its Subsidiaries or obligating Arcadian or any of its Subsidiaries to grant,
extend or enter into any such option, warrant, call, right, commitment or
agreement.
 
     (b) Except as disclosed in Schedule 5.05 or any of the Arcadian SEC
Documents, all of the outstanding capital stock of, or other ownership interests
in, each Subsidiary of Arcadian is owned by Arcadian, directly or
 
                                      I-11
<PAGE>   13
 
indirectly, free and clear of any Lien and free of any other limitation or
restriction (including any restriction on the right to vote, sell or otherwise
dispose of such capital stock or other ownership interests).
 
     SECTION 5.06. SEC Documents. Arcadian has previously furnished to PCS true
and complete copies of:
 
          (a) Arcadian Annual Reports on Form 10-K filed with the SEC for each
     of the years ended December 31, 1993 through 1995;
 
          (b) Arcadian Quarterly Reports on Form 10-Q filed with the SEC for the
     quarters ended March 31 and June 30, 1996;
 
          (c) each definitive proxy statement filed by Arcadian with the SEC
     since December 31, 1993;
 
          (d) each final prospectus filed by Arcadian with the SEC since
     December 31, 1993, except any final prospectus on Form S-8; and
 
          (e) all Current Reports on Form 8-K filed by Arcadian with the SEC
     since December 31, 1995.
 
     As of their respective dates, such reports, proxy statements and
prospectuses (collectively, the "Arcadian SEC Documents") (i) complied as to
form in all material respects with the applicable requirements of the Securities
Act and the Exchange Act and (ii) did not contain any untrue statement of a
material fact or omit to state a material fact required to be stated therein or
necessary to make the statements therein, in light of the circumstances under
which they were made, not misleading. The audited consolidated financial
statements and unaudited consolidated interim financial statements included in
the Arcadian SEC Documents (including any related notes and schedules) fairly
present the financial position of Arcadian and its consolidated Subsidiaries as
of the dates thereof and the results of operations and cash flows for the
periods or as of the dates then ended (subject, where appropriate, to normal
year-end adjustments), in each case in accordance with past practice and
generally accepted accounting principles in the United States ("GAAP")
consistently applied during the periods involved (except as otherwise disclosed
in the notes thereto). Since December 31, 1993, Arcadian has timely filed all
reports, registration statements and other filings required to be filed by it
with the SEC under rules and regulations of the SEC.
 
     SECTION 5.07. Compliance with Laws. The businesses of Arcadian and its
Subsidiaries are not being conducted in violation of any law, ordinance or
regulation of any governmental entity (provided that no representation or
warranty is made in this Section 5.07 with respect to Environmental Laws),
except as disclosed in any of the Arcadian SEC Documents and except for such
violations as would not, individually or in the aggregate, have a Material
Adverse Effect on Arcadian.
 
     SECTION 5.08. No Undisclosed Liabilities. As of June 30, 1996, neither
Arcadian nor any of its Subsidiaries had any liabilities or obligations of any
nature, whether or not accrued, contingent or otherwise, that would be required
by GAAP to be reflected on a consolidated balance sheet of Arcadian and its
Subsidiaries (including the notes thereto), except for (a) the liabilities or
obligations reflected in any of the Arcadian SEC Documents, (b) the liabilities
and obligations described on Schedule 5.08, and (c) the liabilities or
obligations which would not, individually or in the aggregate, have a Material
Adverse Effect on Arcadian.
 
     SECTION 5.09. Litigation. Except as previously disclosed in writing to PCS
or as disclosed in any of the Arcadian SEC Documents, there is no (i) class
action litigation pending or, to the best knowledge of Arcadian, threatened
against or affecting Arcadian or any of its Subsidiaries, (ii) other suit,
action or proceeding pending or, to the best knowledge of Arcadian, threatened
against or affecting Arcadian or any of its Subsidiaries that is reasonably
likely to have a Material Adverse Effect on Arcadian or (iii) judgment, decree,
injunction, rule or order of any governmental entity or arbitrator outstanding
against Arcadian or any of its Subsidiaries that is reasonably likely to have a
Material Adverse Effect on Arcadian.
 
     SECTION 5.10. Environmental Matters. Except as previously disclosed in
writing to PCS, as described in the Arcadian SEC Documents, or as disclosed in
Schedule 5.10, (a) Arcadian and each of its Subsidiaries are in compliance with
all applicable Environmental Laws except for non-compliance which would not,
individually or in the aggregate, have a Material Adverse Effect on Arcadian
and, to the best knowledge of
 
                                      I-12
<PAGE>   14
 
Arcadian, there are no existing or reasonably foreseeable circumstances,
conditions, events or occurrences that are reasonably likely to materially
prevent or interfere with such compliance in the next three years; (b) Arcadian
and each of its Subsidiaries have obtained and maintained in effect, or are in
the process of obtaining, all Environmental Permits required with respect to
their properties, assets, businesses, and operations, except where the failure
to do so would not, individually or in the aggregate, have a Material Adverse
Effect on Arcadian; (c) neither Arcadian nor any of its Subsidiaries has
received written notice of, or, to the best knowledge of Arcadian, is the
subject of, any Environmental Claim which is reasonably likely to, individually
or in the aggregate, have a Material Adverse Effect on Arcadian; (d) as of June
30, 1996, neither Arcadian nor any of its Subsidiaries had any liabilities or
obligations of any nature, whether accrued, contingent or otherwise, and whether
relating to Arcadian, any of its Subsidiaries or any predecessor entities of
Arcadian or any of its Subsidiaries, arising under or relating to any
Environmental Law or Environmental Claim, except for liabilities or obligations
which would not, individually or in the aggregate, be reasonably expected to
result in losses (excluding capital expenditures) in excess of $5,000,000 during
the five-year period from the date hereof or (ii) individually or in the
aggregate, have a Material Adverse Effect on Arcadian; and (e) neither Arcadian
nor any of its Subsidiaries owns, leases or operates or, since January 1, 1986,
has owned, leased or operated, any real property in New Jersey or Connecticut,
or conducts or, since January 1, 1986, has conducted, any operations in New
Jersey or Connecticut.
 
     SECTION 5.11. ERISA. (a) Schedule 5.11 contains a list identifying each
"employee benefit plan", as defined in Section 3(3) of the Employee Retirement
Income Security Act of 1974 ("ERISA"), which (i) is subject to any provision of
ERISA and (ii) is maintained, administered or contributed to by Arcadian or any
Subsidiary of Arcadian and covers any employee or former employee of Arcadian or
any Subsidiary of Arcadian or under which Arcadian or any Subsidiary of Arcadian
has any liability. Copies of such plans (and, if applicable, related trust
agreements and/or insurance contracts) and all amendments thereto and written
interpretations thereof have been furnished to PCS together with (A) the three
most recent annual reports (Form 5500 including, if applicable, Schedule A or
Schedule B thereto or both) prepared in connection with any such plan, (B) the
most recent annual actuarial valuation report prepared in connection with any
such plan, and (c) the summary plan description (as defined in ERISA), if any,
and, all modifications thereto, prepared in connection with any such plan. Such
plans are referred to collectively herein as the "Arcadian Employee Plans". The
only Arcadian Employee Plans which individually or collectively would constitute
an "employee pension benefit plan (the "Pension Plans"), as defined in Section
3(2) of ERISA, are identified as such in the list referred to above.
 
     (b) Except as set forth in Schedule 5.11, no Arcadian Employee Plan (i)
constitutes a "Multiemployer Plan", as defined in Section 3(37) of ERISA (a
"Multiemployer Plan"), (ii) is maintained in connection with any trust described
in Section 501(c)(9) of the Code, or (iii) is subject to Title IV of ERISA.
Neither Arcadian nor any ERISA Affiliate, as defined below, of Arcadian has (A)
engaged in, or is a successor to an entity that has engaged in, a transaction
described in Sections 4069 or 4212(c) of ERISA or (B) incurred, or reasonably
expects to incur prior to the Effective Time, (1) any liability under Title IV
of ERISA arising in connection with the termination of, or a complete or partial
withdrawal from, any plan covered or previously covered by Title IV of ERISA or
(2) any liability under Section 4971 of the Code that in either case could
become a liability of PCS or any of its Affiliates after the Effective Time.
Nothing done or omitted to be done and no transaction or holding of any asset
under or in connection with any Arcadian Employee Plan has or will make Arcadian
or any Subsidiary of Arcadian, or any officer or director of Arcadian or any
Subsidiary of Arcadian, subject to any liability under Title I of ERISA or
liable for any tax pursuant to Section 4975 of the Code that could have a
Material Adverse Effect on Arcadian. As of December 31, 1995, the present value
of all benefits accrued under each Arcadian Employee Plan subject to Title IV of
ERISA, other than a Multiemployer Plan (an "Arcadian Title IV Plan"), determined
on an ongoing basis using the assumptions used in the most recently prepared
annual actuarial valuation report, did not exceed the fair market value of the
assets of such Arcadian Title IV Plan as of such date (excluding for these
purposes any accrued but unpaid contributions) by more than $1,000,000. As of
December 31, 1995, there was no aggregate unfunded liability of Arcadian and any
Subsidiary of Arcadian in respect of all Arcadian Employee Plans or Arcadian
Benefit Arrangements described under Sections 4(b)(5) or 401 (a)(1) of ERISA,
computed using reasonable actuarial assumptions and determined as if all
benefits under such plans were vested and payable as
 
                                      I-13
<PAGE>   15
 
of such date. All contributions or payments required to be made or accrued on
behalf of any Arcadian Employee Plan maintained by Arcadian, any of its
Subsidiaries, or any ERISA Affiliate, before the Effective Time, under the terms
of any Arcadian Employee Plan, will have been made or accrued by Arcadian, or by
its Subsidiaries, or any ERISA Affiliate, as applicable, by the Effective Time.
No Arcadian Employee Plan subject to Section 412 of the Code has incurred any
"accumulated funding deficiency" (as defined in ERISA), whether or not waived.
For purposes of this Section 5.11. "ERISA Affiliate" shall mean any entity which
is considered one employer with Arcadian under Section 4001 of ERISA or Section
414 of the Code.
 
     (c) With respect to each Arcadian Employee Plan which is intended to be
qualified under Section 401(a) of the Code, Arcadian has received a favorable
determination letter that the plan is so qualified and that each trust forming a
part thereof is exempt from tax pursuant to Section 501(a) of the Code and, to
the best knowledge of Arcadian, no event has occurred since the date of such
determination that would adversely affect such qualification and exception.
Arcadian has furnished to PCS copies of the most recent Internal Revenue Service
determination letters with respect to each such Plan. Each Arcadian Employee
Plan has been maintained in all material respects in compliance with its terms
and with the requirements prescribed by any and all statutes, orders, rules and
regulations, including but not limited to ERISA and the Code, which are
applicable to such Plan.
 
     (d) Except as set forth in Schedule 5.11, there is no contract, agreement,
plan or arrangement covering any employee or former employee of Arcadian or any
Subsidiary of Arcadian that, individually or collectively, could give rise to
the payment of any amount that would not be deductible pursuant to the terms of
Sections 162(a)(1), 162(m) or 280G of the Code.
 
     (e) Schedule 5.11 contains a list of each employment, severance or other
similar contract, arrangement or policy and each plan or arrangement (written or
oral) providing for insurance coverage (including any self-insured
arrangements), workers' compensation, disability benefits, supplemental
unemployment benefits, vacation benefits, retirement benefits or for deferred
compensation, profit-sharing, bonuses, stock options, stock appreciation or
other forms of incentive compensation or post-retirement insurance, compensation
or benefits which (i) is not an Arcadian Employee Plan, (ii) is entered into,
maintained or contributed to, as the case may be, by Arcadian or any of its
Subsidiaries and (iii) covers any United States employee or former employee of
Arcadian or any of its Subsidiaries. Such contracts, plans and arrangements as
are described above, copies (or descriptions, in the case of oral arrangements)
of all of which have been furnished or made available previously to PCS are
referred to collectively herein as the "Arcadian Benefit Arrangements". Each
Arcadian Benefit Arrangement has been maintained in substantial compliance with
its terms and with the requirements prescribed by any and all statutes, orders,
rules and regulations that are applicable to such Arcadian Benefit Arrangement.
 
     (f) Neither Arcadian nor any Subsidiary of Arcadian has any current or
projected liability in respect of post-employment or post-retirement health or
medical or life insurance benefits for retired, former or current employees of
Arcadian or any Subsidiary of Arcadian, except as required to avoid excise tax
under Section 4980B of the Code. No condition exists that would prevent Arcadian
or any Subsidiary of Arcadian from amending or terminating any Arcadian Employee
Plan or Arcadian Benefit Arrangement providing health or medical benefits in
respect of any active or former employee of Arcadian or any Subsidiary other
than limitations imposed under the terms of a collective bargaining agreement.
 
     (g) Except as set forth in Schedule 5.11 or as described in Section
5.13(j), there has been no amendment to, written interpretation or announcement
(whether or not written) by Arcadian or any of its Subsidiaries relating to, or
change in employee participation or coverage under, any Arcadian Employee Plan
or Arcadian Benefit Arrangement which would increase materially the expense of
maintaining such Arcadian Employee Plan or Arcadian Benefit Arrangement above
the level of the expense incurred in respect thereof for the fiscal year ended
on December 31, 1995.
 
     (h) Except as set forth in Schedule 5.11, neither Arcadian nor any
Subsidiary of Arcadian is a party to or subject to (i) any employment contract
or arrangement providing for annual future cash compensation of $250,000 or more
with any officer, director or employee, or (ii) any collective bargaining
agreement or union contract.
 
                                      I-14
<PAGE>   16
 
     (i) Arcadian has provided to PCS a list of (a) the names, titles, annual
salaries and other compensation of all officers of Arcadian or its Subsidiaries
and all other employees of Arcadian or its Subsidiaries whose annual base salary
exceeds $250,000 and (b) the wage rates for non-salaried employees of Arcadian
and its Subsidiaries (by classification). None of the employees referred to in
clause (a) and no other key employee of Arcadian or its Subsidiaries has
disclosed to Arcadian and its Subsidiaries that he or she intends to resign or
retire as a result of the transactions contemplated by this Agreement, or
otherwise for any other reason within one year after the date of this Agreement.
 
     (j) Arcadian and its Subsidiaries are in compliance with all currently
applicable laws respecting employment and employment practices, terms and
conditions of employment and wages and hours, and are not engaged in any unfair
labor practice, failure to comply with which or engagement in which, as the case
may be, would reasonably be expected to have a Material Adverse Effect on
Arcadian. There is no unfair labor practice complaint pending or, to the best
knowledge of Arcadian, threatened against Arcadian or any Subsidiary of Arcadian
before the National Labor Relations Board which would reasonably be expected to
have a Material Adverse Effect on Arcadian.
 
     (k) Schedule 5.11 identifies each employment, severance or other similar
contract, arrangement or policy and each plan or arrangement (written or oral)
providing for insurance coverage (including any self-insured arrangements),
workers' compensation, disability benefits, supplemental unemployment benefits,
vacation benefits, retirement benefits or for deferred compensation,
profit-sharing, bonuses, stock options, stock appreciation or other forms of
incentive compensation or post-retirement insurance, compensation or benefits
which (i) is not an Arcadian Employee Plan or Arcadian Benefit Arrangement, (ii)
is entered into, maintained or contributed to, as the case may be, by Arcadian
or any of its Subsidiaries and (iii) covers any employee or former employee of
Arcadian or any of its Subsidiaries (each an "Arcadian International Plan").
Arcadian has furnished to PCS copies of each Arcadian International Plan. Each
Arcadian International Plan has been maintained in substantial compliance with
its terms and with the requirements prescribed by any and all applicable
statutes, orders, rules and regulations (including any special provisions
relating to qualified plans where such Plan was intended to so qualify) and has
been maintained in good standing with applicable regulatory authorities. There
has been no amendment to, written interpretation of or announcement (whether or
not written) by Arcadian or any Subsidiary relating to, or change in employee
participation or coverage under, any Arcadian International Plan that would
increase materially the expense of maintaining such International Plan above the
level of expense incurred in respect thereof for the most recent fiscal year
ended prior to the date hereof. According to the actuarial assumptions and
valuations most recently used for the purpose of funding each Arcadian
International Plan (or, if the same has no such assumptions and valuations or is
unfunded, according to reasonable actuarial assumptions and valuations), as of
December 31, 1994, the total amount or value of the funds available under such
Plan to pay benefits accrued thereunder or segregated in respect of such accrued
benefits, together with any reserve or accrual with respect thereto, was not
less than the present value of all benefits (actual or contingent) accrued as of
such date of all participants and past participants therein in respect of which
Arcadian or any Subsidiary has or would have after the Closing any obligation.
From and after the Closing Date, PCS and its Affiliates will get the full
benefit of any such funds, accruals or reserves, to the extent permitted by
applicable law.
 
     (l) Except as previously disclosed in writing to PCS, there is no issue
with respect to any Arcadian Employee Plan or Benefit Arrangement that is now,
or within the last twelve months has been, under examination by the Internal
Revenue Service or the Department of Labor and no audit with respect to any
Arcadian Employee Plan or Benefit Arrangement by either the Internal Revenue
Service or the Department of Labor has occurred. There are no pending
investigations by any governmental or regulatory agency or authority involving
or relating to any Arcadian Employee Plan or Benefit Arrangement, no threatened
or pending claims (except for claims for benefit payable in the normal
operations of the Arcadian Employee Plans or Benefit Arrangement), suits or
proceedings against any Arcadian Employee Plan or Benefit Arrangement or
asserting any rights or claims to benefits under any Arcadian Employee Plan or
Benefit Arrangement which could reasonably be expected to have a Material
Adverse Effect on Arcadian.
 
     (m) Neither Arcadian nor any of its Subsidiaries nor any ERISA Affiliate
has provided, or is required to provide, security to any Arcadian Employee Plan
pursuant to Section 401(a)(29) of the Code.
 
                                      I-15
<PAGE>   17
 
     SECTION 5.12. Proxy Statement; Registration Statement. Neither the Proxy
Statement nor the Registration Statement will, in the case of the Proxy
Statement or any amendments thereof or supplements thereto, at the time of the
mailing of the Proxy Statement or any amendments or supplements thereto, at the
time of the Special Meeting, and at the Effective Time, or, in the case of the
Registration Statement, at the time it becomes effective, contain any untrue
statement of a material fact relating to Arcadian, its Subsidiaries or the
Merger or omit to state any material fact required to be stated therein relating
to Arcadian, its Subsidiaries or the Merger or necessary in order to make the
statements therein relating to Arcadian, its Subsidiaries or the Merger, in
light of the circumstances under which they were made, not misleading. The Proxy
Statement will comply as to form in all material respects with the provisions of
the Exchange Act.
 
     SECTION 5.13. Absence of Certain Changes. Except as disclosed elsewhere
herein or in any of the Arcadian SEC Documents, as set forth on Schedule 5.13,
or as specifically permitted by Section 6.01, since June 30, 1996, Arcadian and
its Subsidiaries have conducted their business in the ordinary course consistent
with past practice and there has not been:
 
          (a) any event, occurrence or facts which has had or is reasonably
     expected to have a Material Adverse Effect on Arcadian;
 
          (b) any declaration, setting aside or payment of any dividend or other
     distribution with respect to any shares of capital stock of Arcadian (other
     than payment of Arcadian's regular quarterly dividend on Arcadian Common
     Stock in an amount not exceeding $0.10 per share and on the Arcadian
     Preferred Stock), or any repurchase, redemption or other acquisition by
     Arcadian or any Subsidiary of Arcadian of any outstanding shares of capital
     stock or other securities of, or other ownership interests in, Arcadian,
     which repurchase, redemption or other acquisition, individually or in the
     aggregate, is material to Arcadian and its Subsidiaries, taken as a whole;
 
          (c) any amendment of any term of any outstanding security of Arcadian
     or any Subsidiary of Arcadian;
 
          (d) any incurrence, assumption or guarantee by Arcadian or any
     Subsidiary of Arcadian of any indebtedness from any third party for
     borrowed money other than in the ordinary course of business and in amounts
     and on terms consistent with past practices;
 
          (e) any creation or assumption by Arcadian or any Subsidiary of
     Arcadian of any Lien on any material asset other than in the ordinary
     course of business consistent with past practices;
 
          (f) any making of any loan, advance or capital contribution to or
     investment in any Person other than (i) loans, advances or capital
     contributions to or investments in Subsidiaries of Arcadian, (ii)
     investments in securities consistent with past practice or (iii) other
     loans, advances, capital contributions or investments in an aggregate
     amount not exceeding $25,000,000;
 
          (g) any damage, destruction or other casualty loss (whether or not
     covered by insurance) affecting the business or assets of Arcadian or any
     Subsidiary of Arcadian which, individually or in the aggregate, is or may
     reasonably be expected to have a Material Adverse Effect on Arcadian;
 
          (h) except in the ordinary course of business consistent with past
     practice, any transaction or commitment made, or any contract or agreement
     entered into, by Arcadian or any Subsidiary of Arcadian relating to its
     assets or business (including, without limitation, the acquisition or
     disposition of any assets) or any relinquishment by Arcadian or any
     Subsidiary of Arcadian of any contract, license or other right, other than
     transactions, commitments, contracts or agreements contemplated by this
     Agreement;
 
          (i) any change in any method of accounting or accounting principle or
     practice by Arcadian or any Subsidiary of Arcadian, except for any such
     change required by reason of a concurrent change in GAAP;
 
          (j) except (i) in the ordinary course of business, (ii) for Arcadian's
     adoption of the Arcadian Corporation Severance Program and the Arcadian
     Corporation Severance Program for Key Employees (collectively, the
     "Severance Program"), a copy of which has been furnished to PCS, (iii) for
     Arcadian's execution and delivery of certain Employment Agreements with the
     persons listed on Schedule 5.13 (the
 
                                      I-16
<PAGE>   18
 
     "Employment Agreements"), a copy of the form of which has been furnished to
     PCS, and (iv) for Arcadian's adoption of the Restricted Stock Plan, (A) any
     grant by Arcadian or any of its Subsidiaries of any severance or
     termination pay to, or entry into any employment, termination or severance
     arrangement with, any employee or director of Arcadian; (B) any amendment
     in any material respect of any employment, termination or severance
     arrangement with any directors, officers or employees (it being understood
     that any increase or acceleration of benefits under any such agreement or
     arrangement shall be deemed material); (C) any establishment, adoption,
     entry into, or amendment or action to accelerate or enhance any rights or
     benefits under, (i) any plan providing for options, stock, performance
     awards or other forms of incentive or deferred compensation or (ii) any
     collective bargaining, bonus, profit sharing, thrift, compensation,
     restricted stock, pension, retirement, deferred compensation, employment,
     termination, severance or other plan, agreement, trust, fund, policy or
     arrangement for the benefit of any of its directors, officers or employees;
     or (D) any increase in the compensation or benefits of any other employees
     or payment of any benefit not required by any plan or arrangement as in
     effect on June 30, 1996;
 
          (k) except such contracts as would not be material to Arcadian and its
     Subsidiaries as a whole, any entry by Arcadian or any of its Subsidiaries
     into any contract limiting the right of Arcadian or any of its Subsidiaries
     at any time on or after the date of this Agreement or PCS or any of its
     Subsidiaries or affiliates at or after the Effective Time, to engage in, or
     to compete with any Person in, any business; or
 
          (l) any entry by Arcadian or any of its Subsidiaries into any
     acquisition or joint venture which is material to Arcadian and its
     Subsidiaries, taken as a whole.
 
     SECTION 5.14. Taxes. (a) All Tax Returns required to be filed (taking into
account all extensions heretofore granted) on or before the Effective Time by or
on behalf of Arcadian or any of its Subsidiaries have been filed with the
appropriate Taxing Authorities within the time and in the manner prescribed by
law, other than those Tax Returns the failure of which to file in the aggregate
would not have a Material Adverse Effect on Arcadian.
 
     (b) All such Tax Returns are true, correct and complete in all material
respects. Except as listed on Schedule 5.14, no such Tax Return for tax years
beginning after September 1, 1988 contains a disclosure statement under Section
6662(d)(2)(B)(ii)(I) of the Code or any similar provision of state, local or
foreign law. For each taxable year of Arcadian and its Subsidiaries beginning
after December 31, 1989, Arcadian will furnish or make available (or cause to be
furnished or made available) to PCS or its representatives, immediately after
the date hereof, true and complete copies of all Tax Returns filed by Arcadian
and its Subsidiaries.
 
     (c) All Taxes shown to be due and payable by Arcadian and any of its
Subsidiaries on all such Tax Returns have been paid, or withheld or collected
and remitted or deposited in full to or with the appropriate Taxing Authorities,
and Arcadian and its Subsidiaries have made appropriate provision in their June
30, 1996 financial statements for any Taxes owed but not yet paid.
 
     (d) Except as set forth on Schedule 5.14, (i) all applicable statutes of
limitations for the assessment, reassessment, or collection of material Taxes
against Arcadian and any of its Subsidiaries have expired, (ii) no deficiency
payment of any Taxes for any period has been asserted or raised by any Taxing
Authority which remains unpaid at the date hereof except for deficiencies which
would not have a Material Adverse Effect on Arcadian, (iii) no adjustment,
assessment, reassessment or collection for Taxes applicable to Arcadian or any
of its Subsidiaries has been proposed or, to the knowledge of Arcadian and its
Subsidiaries, threatened by any Taxing Authorities, except for adjustments,
assessments, reassessments or collections that would not, individually, or in
the aggregate, have a Material Adverse Effect on Arcadian; (iv) no closing
agreement is in effect for any period with respect to any Tax applicable to
Arcadian or any of its Subsidiaries; (v) no power of attorney has been granted
by Arcadian or any of its Subsidiaries with respect to any matter relating to
Taxes, which is currently in force; (vi) any material adjustment or material
assessment of federal Taxes prior to the Effective Time which is required to be
reported by Arcadian or any of its Subsidiaries to the appropriate Taxing
Authorities has been reported and any additional amount due and payable with
respect thereto has
 
                                      I-17
<PAGE>   19
 
been paid in full; and (vii) there is, and there will be, no valid basis for the
Internal Revenue Service to request an extension of the statute of limitation
with respect to any federal income Tax Return of Arcadian or any of its
Subsidiaries beyond the limitations period which generally expires three years
after the filing of any such Tax Return as a result of a more than 25% omission
from gross income in connection with such Tax Return. Schedule 5.14 lists all
Tax Returns filed with respect to Arcadian and any of its Subsidiaries for the
taxable periods beginning on or after January 1, 1989 that have been audited,
and indicates those Tax Returns that currently are the subject of audit.
 
     (e) Except for Tax Returns required to be filed with respect to the 1995
taxable year, neither Arcadian nor any of its Subsidiaries has requested any
extension of time within which to file any Tax Return which has not yet been
filed.
 
     (f) There are no material Liens applicable to either Arcadian or any of its
Subsidiaries or any property or assets of Arcadian or any of its Subsidiaries
for Taxes except for Liens in respect of Taxes (i) not yet due, or (ii) which
are being contested in good faith and by appropriate proceedings (and for the
payment of which adequate reserves have been provided) and which are reflected
in the Arcadian SEC Documents, and neither Arcadian nor any of its Subsidiaries
has received any notice of such Liens for Taxes.
 
     (g) Except as set forth on Schedule 5.14, there is no claim, audit, action,
suit, proceeding or investigation now pending or threatened against or with
respect to Arcadian or any of its Subsidiaries in respect of any Taxes, except
for any such matters as would not, individually or in the aggregate, have a
Material Adverse Effect on Arcadian.
 
     (h) Neither Arcadian nor any of its Subsidiaries has any contractual
obligations under any tax sharing or similar agreement or arrangement or tax
indemnity agreement with any individual or entity which is not a member, as of
the date hereof, of the affiliated group of corporations (within the meaning of
Section 1504 of the Code) filing a consolidated federal income Tax Return of
which Arcadian is the common parent. Neither Arcadian nor any of its
Subsidiaries is or has been a member of an affiliated group (within the meaning
of Section 1504 of the Code) filing a consolidated federal income Tax Return
during any part of any consolidated Tax Return year within any part of such year
any corporation other than Arcadian and its Subsidiaries also was a member of
such affiliated group. Neither Arcadian nor any of its Subsidiaries has any
liability for the taxes of any person (other than Arcadian or any of its
Subsidiaries) under Treasury Regulation Section 1.1502-6 (or any similar
provision of state, local, or foreign law), as a transferee or successor, by
contract or otherwise.
 
     (i) There are no requests for rulings, determinations or information or
subpoenas in respect of any material Tax pending between Arcadian or any of its
Subsidiaries and any Taxing Authorities, and to the knowledge of Arcadian and
its Subsidiaries, no such requests or subpoenas are threatened or contemplated
by any Taxing Authority.
 
     (j) Neither Arcadian or any of its Subsidiaries owns any interest in real
property in the State of New York or in any other jurisdiction in which a Tax is
imposed on the transfer of a controlling interest in an entity that owns any
interest in real property.
 
     (k) Except as set forth on Schedule 5.14, (i) neither Arcadian nor any of
its Subsidiaries has income reportable for a period ending after the Effective
Time but attributable to a transaction (e.g., an installment sale) occurring in
or a change in accounting method made for a period ending on or prior to the
Effective Time which resulted in a deferred reporting of income from such
transaction or from such change in accounting method (other than a deferred
intercompany transaction), or deferred gain or loss arising out of any deferred
company transaction; (ii) neither Arcadian nor any of its Subsidiaries has filed
a consent under Section 341 of the Code; (iii) neither Arcadian nor any of its
Subsidiaries has entered into any compensatory contract, agreement or other
arrangement (whether formally or informally) with respect to the performance of
services which contain terms that would cause any payments thereunder made after
the Effective Time to result in a nondeductible expense to Arcadian or any of
its Subsidiaries (or their successors) pursuant to Section 162(m) or 280G of the
Code or an excise tax to the recipient of such payment pursuant to Section 4999
of the Code; (iv) neither Arcadian nor any of its Subsidiaries is the borrower
or guarantor of any outstanding industrial revenue bonds, and neither Arcadian
nor any of its Subsidiaries is a tenant, principal
 
                                      I-18
<PAGE>   20
 
user or related person to any principal user (within the meaning of Section
144(a) of Code) of any property which is currently financed or improved with the
proceeds of any industrial revenue bonds; (v) neither Arcadian nor any of its
Subsidiaries is a party to any safe harbor lease within the meaning of Section
168(f) of the Code, as in effect prior to its amendment by the Tax Equity and
Fiscal Responsibility Act of 1982; and (vi) neither Arcadian nor any of its
Subsidiaries has participated in or cooperated with any international boycott
within the meaning of Section 999 of the Code.
 
     (l) Neither Arcadian nor any of its Subsidiaries is a United States real
property holding corporation within the meaning of Section 897(c)(2) of the Code
during the applicable period specified in Section 897(c)(1)(A)(ii) of the Code.
 
     (m) In this Section 5.14, (i) "Tax" or "Taxes" shall mean any and all
taxes, fees, levies, duties, assessments and any other charges of any kind
whatsoever (whether payable directly or by withholding), together with any and
all interest, penalties, fines, additions to tax and additional amounts imposed
with respect thereto, imposed by any Taxing Authorities which relate to or
affect Arcadian or its Subsidiaries; (ii) "Tax Return" shall mean all returns,
reports, information statements, declarations, estimates, filings and other
information (including any schedules, attachments and additional or supporting
material), and any amendments thereto, filed or maintained, or required to be
filed or maintained, in respect of Taxes; (iii) "Taxing Authorities" shall mean
any federal, state, local, foreign or other governmental, administrative,
regulatory or self-regulating authority, agency, body or official; and (iv)
"Treasury Regulation" shall mean a final or temporary Treasury Regulation
promulgated under the Code.
 
     SECTION 5.15. Fairness Opinion. Arcadian has received the opinion of CS
First Boston to the effect that, as of the date hereof, the consideration to be
received by the holders of Arcadian Common Stock in the Merger is fair to such
holders from a financial point of view.
 
     SECTION 5.16. Takeover Statutes. Assuming that none of PCS and its
Affiliates is an "Interested Stockholder" as such term is defined in Section 203
of the Delaware Law, no Takeover Statute, including, without limitation, Section
203 of the Delaware Law, applicable to Arcadian or any of its Subsidiaries is
applicable to the Merger or the other transactions contemplated hereby.
 
     SECTION 5.17. Merger-Related Tax Matters.
 
     (a) Neither Arcadian nor any of its affiliates has taken or agreed to take
any action that would prevent the Merger from constituting a reorganization
qualifying under the provisions of Section 368(a) of the Code.
 
     (b) Arcadian will deliver to PCS a letter from Mr. Gordon Cain prior to the
Effective Date to the effect that (i) Mr. Cain has no current intention to sell,
exchange, or otherwise dispose of, or reduce his risk of loss with respect to,
any PCS Common Stock received by him pursuant to the Merger, and (ii) Mr. Cain
agrees not to sell, exchange, or otherwise dispose of, or reduce his risk of
loss with respect to, 50% of the PCS Common Stock received by him in the Merger
for a period of two years after the Effective Date, and to Arcadian's knowledge,
there is no plan or intention by any stockholder of Arcadian who owns five (5)
percent or more of the Arcadian Common Stock, or the Arcadian Preferred Stock,
and to Arcadian's knowledge there is no plan or intention on the part of the
remaining holders of the Arcadian Common Stock, or of the Arcadian Preferred
Stock, to sell, exchange or otherwise dispose of a number of shares of PCS
Common Stock to be received in the Merger that would reduce the Arcadian
stockholders' ownership of the PCS Common Stock to a number of shares having a
value, as of the Effective Date, of less than fifty (50) percent of the value of
all of the Arcadian Common Stock and Arcadian Preferred Stock outstanding
immediately prior to the Effective Time. In making this determination, Arcadian
Common Stock and Arcadian Preferred Stock redeemed within one year prior to the
Merger and Arcadian Common Stock and Arcadian Preferred Stock exchanged for cash
or other property, surrendered by dissenters for cash or exchanged for cash in
lieu of fractional shares of PCS Common Stock will be included.
 
     (c) The Surviving Corporation will acquire at least ninety (90) percent of
the fair market value of the net assets and at least seventy (70) percent of the
fair market of the gross assets held by Arcadian immediately prior to the
Merger. For purposes of this representation, amounts used by Arcadian to pay
Merger expenses
 
                                      I-19
<PAGE>   21
 
and all redemptions and distributions (except for regular normal dividends) made
by Arcadian within one year preceding the Merger, will be included as assets of
Arcadian held immediately prior to the Merger.
 
     (d) The liabilities of Arcadian to be assumed by the Surviving Corporation
and the liabilities to which the assets of Arcadian are subject were incurred by
Arcadian in the ordinary course of its business.
 
     (e) Arcadian and the holders of Arcadian Common Stock and Arcadian
Preferred Stock will pay their own respective expenses, if any, incurred in
connection with the Merger.
 
     (f) There is no indebtedness existing between PCS and Arcadian or between
Merger Sub and Arcadian that was issued, acquired, or will be settled at a
discount.
 
     (g) Neither Arcadian nor any of its Subsidiaries is an investment company
as defined in Section 368(a)(2)(F)(iii) or (iv) of the Code.
 
     (h) Arcadian is not under the jurisdiction of a court in a U.S.C. Title 11
or similar case within the meaning of Section 368(a)(3)(A) of the Code.
 
     (i) The fair market value of the assets of Arcadian to be acquired by the
Surviving Corporation will equal or exceed the sum of the liabilities to be
assumed by the Surviving Corporation in the Merger, plus the amount of the
liabilities to which Arcadian's assets are subject.
 
     SECTION 5.18. Brokers or Finders. Arcadian has not engaged any agent,
broker, investment banker, financial advisor or other firm or person who is or
will be entitled to any brokers' or finders' fee in connection with the
transactions contemplated by this Agreement other than CS First Boston.
 
     SECTION 5.19. Additional Matters. Arcadian has delivered to PCS complete
and correct copies of certain resolutions adopted by the Board of Directors of
Arcadian prior to the date hereof.
 
     SECTION 5.20. Certain Voting Agreements. Arcadian has delivered to PCS
commitments of each member of the Board of Directors to vote all shares of
Arcadian Common Stock and Arcadian Preferred Stock over which such member
exercises voting control in favor of the adoption of this Agreement and approval
of the Merger.
 
                                   ARTICLE 6
 
                                   COVENANTS
 
     PCS, Merger Sub and Arcadian further agree as follows:
 
     SECTION 6.01. Conduct of Arcadian's Business. Prior to the Effective Time
or the date, if any, on which this Agreement is earlier terminated pursuant to
Section 8.01 (the "Termination Date"), and except as may be permitted pursuant
to this Agreement, Arcadian:
 
     (a) shall, and shall cause its Subsidiaries to, conduct its and their
operations in the ordinary and usual course of business in substantially the
same manner as heretofore conducted;
 
     (b) shall use its reasonable efforts, and shall cause each of its
Subsidiaries to use its reasonable efforts, to preserve intact their respective
business organizations and goodwill in all material respects, keep available the
services of its officers and employees as a group, subject to changes in the
ordinary course, and maintain satisfactory relationships with suppliers,
distributors, customers and others having business relationships with it;
 
     (c) shall notify PCS of any material emergency or material change in the
normal course of its or its Subsidiaries' businesses or in the operation of
their properties and of any governmental complaints, investigations or hearings
(or communications indicating that the same may be contemplated) if such
emergency, change, complaint, investigation or hearing would have a Material
Adverse Effect on Arcadian;
 
     (d) except as expressly permitted by this Agreement, shall not, and shall
not permit any of its Subsidiaries which is not wholly-owned to, declare or pay
any dividends on or make any distribution with
 
                                      I-20
<PAGE>   22
 
respect to its outstanding shares of capital stock other than Arcadian's regular
quarterly dividend on Arcadian Common Stock in an amount not exceeding $0.10 per
share and the dividend on the Arcadian Preferred Stock;
 
     (e) except as contemplated by Section 5.13(j), and except in the ordinary
course of business, shall not (i) grant or permit any of its Subsidiaries to
grant any severance or termination pay to, or enter into any employment,
termination or severance arrangement with, its employee or directors, (ii) amend
in any material respect any employment, termination or severance arrangement
with any directors, officers or employees (it being understood that any increase
or acceleration of benefits under any such agreement or arrangement (other than
bonuses paid in the ordinary course of business consistent with past practice)
shall be deemed material); (iii) establish, adopt, enter into, or amend or take
action to accelerate or enhance any rights or benefits under, (A) any plan
providing for options, stock, performance awards or other forms of incentive or
deferred compensation or (B) any collective bargaining, bonus, profit sharing,
thrift, compensation, restricted stock, pension, retirement, deferred
compensation, employment, termination, severance or other plan, agreement,
trust, fund, policy or arrangement for the benefit of any of its directors,
officers or employees; or (iv) increase the compensation or benefits of any
other employees or payment of any benefit not required by any plan or
arrangement as in effect on June 30, 1996;
 
     (f) subject to Section 6.09, shall not, and shall not permit any of its
Subsidiaries to, authorize, propose or announce an intention to authorize or
propose, or enter into an agreement with respect to, any merger, consolidation
or business combination (other than the Merger and any partnership or joint
venture arrangements entered into in the ordinary course of business consistent
with past practice), any acquisition of a material amount of assets or
securities, any disposition of a material amount of assets or securities or any
release or relinquishment of any material contract rights not in the ordinary
course of business;
 
     (g) except as otherwise contemplated herein, shall not, and shall not
permit any of its Subsidiaries to, issue any shares of capital stock except upon
exercise of rights pursuant to securities outstanding on June 30, 1996, or upon
exercise of rights or options issued pursuant to existing employee incentive and
benefit plans, programs or arrangements (including, without limitation, shares
issued in connection with stock grants or awards or the exercise of rights or
options granted in the ordinary course of business consistent with past practice
pursuant to such plans, programs or arrangements) or effect any stock split not
previously announced or otherwise change its capitalization as it existed on
June 30, 1996;
 
     (h) shall not, and shall not permit any of its Subsidiaries to, grant,
confer or award any options, warrants, conversion rights or other rights, not
existing on the date hereof, to acquire any shares of its capital stock, except
grants of options pursuant to employee incentive and benefit plans, programs or
arrangements in existence on the date hereof in the ordinary course of business
consistent with past granting practices and policies;
 
     (i) except as otherwise described herein shall not, and shall not permit
any of its Subsidiaries to, except in the ordinary course of business in
connection with employee incentive and benefit plans, programs or arrangements
in existence on the date hereof, purchase or redeem any shares of its capital
stock;
 
     (j) shall not, and shall not permit any of its Subsidiaries to, incur,
assume or guaranty any indebtedness from any third party for borrowed money,
other than in the ordinary course of business consistent with past practice;
 
     (k) shall not, and shall not permit any of its Subsidiaries to, amend any
term of any of their outstanding securities;
 
     (l) shall not, and shall not permit any of its Subsidiaries to, create or
assume any Lien on any material asset other than in the ordinary course of
business consistent with past practices;
 
     (m) shall not, and shall not permit any of its Subsidiaries to, make any
loan, advance or capital contribution to or investment in any Person other than
(i) loans, advances or capital contributions to or investments in its
Subsidiaries, (ii) investments in securities consistent with past practice or
(iii) other loans,
 
                                      I-21
<PAGE>   23
 
advances, capital contributions or investments in an aggregate amount not
exceeding $25,000,000 since June 30, 1996;
 
     (n) except in the ordinary course of business consistent with past
practice, shall not, and shall not permit any of its Subsidiaries to, enter into
any transaction, commitment, contract or agreement relating to their assets or
businesses (including, without limitation, the acquisition or disposition of any
assets) or to relinquish any contract, license or other right other than
transactions, commitments, contracts or agreements contemplated by this
Agreement;
 
     (o) shall not, and shall not permit any of its Subsidiaries to, change any
of their respective methods of accounting or accounting principles or practices,
except for any such change required by reason of a concurrent change in GAAP;
 
     (p) shall not, and shall not permit any of its Subsidiaries to enter into
any contract limiting the right of Arcadian, or any of its Subsidiaries at any
time on or after the date of this Agreement to engage in, or to compete with any
Person in, any business, except such contracts as would not be material to
Arcadian, and its Subsidiaries, taken as a whole;
 
     (q) subject to Section 6.09, shall not, and shall not permit any of its
Subsidiaries to, agree, in writing or otherwise, to take any of the foregoing
actions or any action which would make any representation or warranty in Article
5 hereof untrue or incorrect in any material respect; and
 
     (r) shall not propose or adopt any amendments to its Restated Certificate
of Incorporation, as amended, or its Amended and Restated Bylaws.
 
     SECTION 6.02. Investigation. Each of PCS and Arcadian shall afford to one
another and to one another's officers, employees, accountants, counsel and other
authorized representatives full and complete access during normal business
hours, throughout the period prior to the earlier of the Effective Time or the
Termination Date, to its and its Subsidiaries' plants, properties, contracts,
commitments, books, and records (including but not limited to tax returns) and
any report, schedule or other document filed or received by it pursuant to the
requirements of federal or state securities laws, and shall use their reasonable
best efforts to cause their respective representatives to furnish promptly to
one another such additional financial and operating data and other information
as to its and its Subsidiaries' respective businesses and properties as the
other or its duly authorized representatives may from time to time reasonably
request; provided that nothing herein shall require either PCS or Arcadian or
any of their respective Subsidiaries to disclose any information to the other
that would cause significant competitive harm to such disclosing party or its
affiliates if the transactions contemplated by this Agreement are not
consummated. The parties hereby agree that each of them will treat any such
information in accordance with the confidentiality letter agreement effective
August 30, 1994 (the "Confidentiality Agreement"). Notwithstanding any provision
of this Agreement to the contrary, no party shall be obligated to make or
refrain from making any disclosure in violation of applicable laws or
regulations.
 
     SECTION 6.03. Cooperation. PCS and Arcadian shall together, or pursuant to
an allocation of responsibility to be agreed upon by them:
 
          (a) prepare and file with the SEC as soon as is reasonably practicable
     the Proxy Statement and a registration statement on Form S-4 under the
     Securities Act with respect to the PCS Common Stock issuable in the Merger
     (the "Registration Statement"), and shall use their reasonable best efforts
     to have the Registration Statement (including the Proxy Statement contained
     therein) declared effective by the SEC under the Securities Act;
 
          (b) as soon as is reasonably practicable take all such action as may
     be required under state blue sky or securities laws in connection with the
     transactions contemplated by this Agreement;
 
          (c) promptly prepare and file with the NYSE and such other stock
     exchanges as shall be agreed upon listing applications covering the shares
     of PCS Common Stock issuable in the Merger and use its reasonable best
     efforts to obtain, prior to the Effective Time, approval for the listing of
     such PCS Common Stock, subject only to official notice of issuance; and
 
                                      I-22
<PAGE>   24
 
          (d) cooperate with one another in order to lift any injunctions or
     remove any other impediment to the consummation of the transactions
     contemplated herein.
 
     Subject to the limitations contained in Section 6.02, PCS and Arcadian
shall each furnish to one another and to one another's counsel all such
information as may be required or appropriate in order to effect the foregoing
actions.
 
     SECTION 6.04. Affiliates. Arcadian shall, prior to the Effective Time,
deliver to PCS a list setting forth the names and addresses of all Persons who
are, in its opinion, at the time of the meeting of the Arcadian stockholders to
be held in accordance with Section 2.01, "affiliates" of Arcadian for purposes
of Rule 145 under the Securities Act. Arcadian shall furnish such information
and documents as PCS may reasonably request for the purpose of reviewing such
list. Arcadian shall use its reasonable best efforts to cause each person who is
identified as an "affiliate" in the list furnished pursuant to this Section 6.04
to execute a written agreement on or prior to the Effective Time, in a form
satisfactory to PCS (an "Affiliate Agreement"), that such person will not offer
or sell or otherwise dispose of any of the shares of PCS Common Stock issued to
such Person pursuant to the Merger in violation of the Securities Act or the
rules and regulations promulgated by the SEC thereunder.
 
     SECTION 6.05. Insurance Extension. PCS and Arcadian shall cooperate to
extend, renew or otherwise continue any existing insurance coverage (or to
provide new insurance coverage) on and after the Effective Time with respect to
claims arising from acts or omissions which occurred on or before the Effective
Time.
 
     SECTION 6.06. Filings; Other Action. Subject to the terms and conditions
herein provided, PCS and Arcadian shall (a) promptly make their respective
filings and thereafter make any other required submissions under the HSR Act,
(b) use reasonable best efforts to cooperate with one another in (i) determining
whether any filings are required to be made with, or consents, permits,
authorizations or approvals are required to be obtained from, any third party,
the United States or Canadian federal government or any agencies, departments or
instrumentalities thereof or governmental, provincial or regulatory authorities
of the several states, provinces and foreign jurisdictions in connection with
the execution and delivery of this Agreement and the consummation of the
transactions contemplated hereby and thereby and (ii) timely making all such
filings and timely seeking all such consents, permits, authorizations or
approvals, and (c) use reasonable best efforts to take, or cause to be taken,
all other actions and do, or cause to be done, all other things necessary,
proper or advisable to consummate and make effective the transactions
contemplated hereby, including, without limitation, taking all such further
action as reasonably may be necessary to resolve such objections, if any, as the
Federal Trade Commission, the Antitrust Division of the Department of Justice,
state antitrust enforcement authorities or competition authorities of any other
nation or other jurisdiction or any other Person may assert under relevant
antitrust or competition laws with respect to the transactions contemplated
hereby.
 
     SECTION 6.07. Further Assurances. In case at any time after the Effective
Time any further action is necessary or desirable to carry out the purposes of
this Agreement, the proper officers or directors of PCS and the Surviving
Corporation shall take all such necessary action.
 
     SECTION 6.08. Takeover Statute. If any Takeover Statute shall become
applicable to the transactions contemplated hereby, each of PCS and Arcadian
shall grant and use their respective reasonable best efforts to obtain such
approvals and take such actions as are reasonably necessary so that the
transactions contemplated hereby may be consummated as promptly as practicable
on the terms contemplated hereby and otherwise act to eliminate or minimize the
effects of such statute or regulation on the transactions contemplated hereby.
 
     SECTION 6.09. No Solicitation. Unless and until this Agreement shall have
been terminated by either party pursuant to Section 8.01, neither PCS nor
Arcadian nor any of their respective Subsidiaries, officers, directors or agents
shall, directly or indirectly, take any action to solicit, initiate or encourage
any proposal or offer with respect to a merger, acquisition, consolidation or
similar transaction involving, or any purchase of all or any significant portion
of the assets or any equity securities of, it or any of its Subsidiaries (any
such proposal or offer being hereinafter referred to as a "Third Party
Acquisition Proposal"); provided, however, that the foregoing limitation shall
not apply if, in the good faith judgment of Arcadian's Board of Directors after
consultation with legal counsel and financial advisors, such Board's fiduciary
duties require such Board or
 
                                      I-23
<PAGE>   25
 
Arcadian to take any such action. PCS and Arcadian each will promptly notify the
other of its receipt of any Third Party Acquisition Proposal, and will provide
the other with two business days' advance notice of any agreement to be entered
into with any Person making a Third Party Acquisition Proposal.
 
     SECTION 6.10. Public Announcements. PCS and Arcadian will consult with each
other before issuing any press release relating to this Agreement or the
transactions contemplated herein and shall not issue any such press release
prior to such consultation except as may be required by law or by obligations
pursuant to any listing agreement with any national securities exchange.
 
     SECTION 6.11. Indemnification and Insurance. For a period of six years
after the Effective Time, PCS shall cause to be maintained in effect (a) the
current provisions regarding indemnification of officers and directors contained
in the Restated Certificate of Incorporation and Amended and Restated Bylaws of
Arcadian, and (b) if available, the current policies of directors' and officers'
liability insurance and fiduciary liability insurance maintained by Arcadian
(provided that PCS may substitute therefor policies of at least the same
coverage and amounts containing terms and conditions which are, in the
aggregate, no less advantageous to the insured) with respect to claims arising
from acts or omissions which occurred on or before the Effective Time; provided,
that PCS shall not be obligated to pay premiums in excess of 200% of the amount
per annum that Arcadian paid in the aggregate in its last fiscal year, it being
understood that PCS shall nevertheless be obligated to provide such coverage as
may be obtained for such amount. PCS shall assume all obligations of Arcadian
and any of its Subsidiaries under any indemnification or similar agreements with
any employee, officer or director of Arcadian in effect immediately prior to the
Effective Time, in each case without releasing the indemnitor under such
agreements.
 
     SECTION 6.12. Accountants' Letters. PCS and Arcadian will each use
reasonable best efforts to cause to be delivered to each other letters from
their respective independent accountants, dated a date within two business days
before the effective date of the Registration Statement, in form and substance
reasonably satisfactory to the recipient and customary in scope and substance
for "comfort" or similar agreed upon procedures letters delivered by independent
accountants in connection with registration statements on Form S-4 under the
Securities Act.
 
     SECTION 6.13. Arcadian Preferred Stock. In connection with the Merger,
Arcadian (i) will elect the "Common Conversion Option" (as defined in the
Certificate of Designation), and the holders of shares of Arcadian Preferred
Stock immediately prior to the conversion thereof pursuant to the exercise of
such Common Conversion Option shall be entitled to the benefits thereof, all as
set forth in the Certificate of Designation.
 
     SECTION 6.14. Additional Reports. PCS and Arcadian shall each furnish to
the other copies of any reports of the type referred to in Sections 4.06 and
5.06 which it files with the SEC on or after the date hereof, and PCS or
Arcadian, as the case may be, represents and warrants that as of the respective
dates thereof, such reports will not contain any untrue statement of a material
fact or omit to state a material fact required to be stated therein or necessary
to make the statement therein, in light of the circumstances under which they
were made, not misleading. Any unaudited consolidated interim financial
statements included in such reports (including any related notes and schedules)
will fairly present the financial position of PCS or Arcadian, as the case may
be, and its consolidated Subsidiaries, as of the dates thereof and the results
of operations and changes in financial position or other information included
therein for the periods or as of the date then ended (subject, where
appropriate, to normal year-end adjustments), in each case in accordance with
past practice and GAAP or Canadian GAAP, as the case may be, consistently
applied during the periods involved (except as otherwise disclosed in the notes
thereto).
 
     SECTION 6.15. Arcadian Warrants. (a) In connection with the Merger,
Arcadian will (i) take such action as may be reasonably necessary to cause or
require each outstanding AAC Warrant to be exercised for shares of Arcadian
Common Stock prior to the Effective Time pursuant to the third sentence of
Section IV(A)(3) of the AAC Warrant Agreement, and at the Effective Time the
Arcadian Common Stock issued upon such exercise shall be converted into the
Merger Consideration in the Merger pursuant to Section 1.01(b)(i) of this
Agreement; and (ii) take all action necessary under the Series B Warrant
Agreement so that at the Effective Time, each outstanding Series B Warrant
shall, pursuant to Sections 2.05
 
                                      I-24
<PAGE>   26
 
and 3.02 of the Series B Warrant Agreement, be deemed to constitute a warrant
having such terms and conditions as may be required by the Series B Warrant
Agreement.
 
     (b) As used in this Agreement:
 
          (i) "AAC Warrant Agreement" means the Warrant Issuance Agreement dated
     as of May 31, 1989, between Arcadian (formerly named Fertilizer Industries,
     Inc.) and AAC Holdings, Inc., on behalf of the holders of the AAC Warrants;
 
          (ii) "AAC Warrant" means a warrant issued pursuant to the AAC Warrant
     Agreement;
 
          (iii) "Series B Warrant Agreement" means the Warrant Agreement dated
     as of December 22, 1989, between Arcadian and Chemical Bank, as Warrant
     Agent, as amended; and
 
          (iv) "Series B Warrant" means a warrant issued pursuant to the Series
     B Warrant Agreement.
 
     SECTION 6.16. No Purchase. Except for the transactions contemplated by this
Agreement, without the prior written consent of Arcadian, in the case of PCS, or
PCS, in the case of Arcadian, from the date hereof until the Effective Time,
neither PCS nor Arcadian shall (a) acquire, offer to acquire or agree to
acquire, directly or indirectly, by purchase or otherwise, any securities or
direct or indirect rights to acquire any securities of Arcadian, in the case of
PCS, or PCS in the case of Arcadian, or any of their respective Subsidiaries, or
of any successor to, or any assets of, Arcadian, in the case of PCS, or PCS, in
the case of Arcadian, or any of their respective Subsidiaries or divisions; or
(b) make, or in any way participate in, directly or indirectly, any
"solicitation" of "proxies" (as such terms are used in the rules of the SEC) to
vote, or seek to advise or influence any Person with respect to the voting of,
any voting securities of Arcadian, in the case of PCS, or PCS, in the case of
Arcadian, or of any of their respective Subsidiaries, and PCS and Arcadian shall
each use reasonable efforts to cause their respective affiliates not to do any
of the foregoing. Arcadian shall promptly advise PCS, and PCS shall promptly
advise Arcadian, of any inquiry or proposal made to it with respect to any of
the foregoing. Notwithstanding clauses (a) and (b) of this Section 6.16, PCS and
Arcadian may make any proposals or communications to each other.
 
     SECTION 6.17. Employee Benefit Plans. (a) It is understood and agreed that
the Merger shall constitute a "Change of Control" or "Change in Control" within
the meaning assigned to such terms, as applicable, under certain employee
incentive plans, option plans, severance programs and employment contracts of
Arcadian and any agreements relating thereto.
 
     (b) At the Effective Time or as soon thereafter as administratively
practicable, PCS shall cause those employees of Arcadian and its Subsidiaries
who are then employed by the Surviving Corporation or any of its Subsidiaries in
positions that are not covered by a collective bargaining agreement (the
"Current Employees") either (i) to be covered by the benefit plans and programs
of PCS and its Subsidiaries with substantially equivalent benefits in respect of
future service that accrue in respect of future services to the employees of PCS
and its Subsidiaries who are employed in comparable positions, or (ii) to be
covered by the benefit plans and programs of Arcadian and its Subsidiaries as in
effect immediately prior to the Effective Time; provided, however, that nothing
herein shall relieve the Surviving Corporation of its obligations under the
Severance Program or under any Employment Agreement or similar contractual
obligation. Current Employees shall be credited for their service with Arcadian
and its Subsidiaries and their predecessors for purposes of participation,
eligibility and vesting under the benefit plans and programs provided by PCS,
and benefit accrual purposes for vacation, severance, pension and retirement
benefits only, and PCS shall cause its group health plan that will provide
coverage to Current Employees to waive any limitations regarding pre-existing
conditions of Current Employees and their eligible dependents (except to the
extent that such limitations would have applied to any such individual under the
group health plan of Arcadian and its Subsidiaries). Upon request of PCS,
Arcadian and its Subsidiaries shall provide PCS's employees with reasonable
access prior to the Effective Time to the Current Employees for purposes of
enrolling such employees and their eligible dependents in the benefit plans and
programs of PCS and its Subsidiaries that are to be provided to such
individuals.
 
                                      I-25
<PAGE>   27
 
     (c) PCS agrees that each officer and other employee of Arcadian or any of
its Subsidiaries who is a party to a written employment agreement with Arcadian
or any of its Subsidiaries, and who remains in the employment of PCS, Surviving
Corporation or any of its other Subsidiaries after the expiration of the term of
such agreement, shall be entitled to the benefits of an employment agreement
with PCS in form and substance substantially similar to the employment
agreement, then in place between PCS and other employees of PCS holding
comparable positions.
 
     SECTION 6.18. Conduct of PCS's Business. Prior to the Effective Time or the
Termination Date, and except as may be permitted pursuant to this Agreement,
PCS:
 
          (a) shall, and shall cause its Subsidiaries to, conduct its and their
     operations in the ordinary and usual course of business in substantially
     the same manner as heretofore conducted;
 
          (b) except as otherwise contemplated herein, shall not effect any
     stock split or otherwise change its capitalization as it existed on June
     30, 1996 (provided, however, that the exercise of employee stock options
     and issuance of shares of PCS Common Stock pursuant to the PCS DRIP shall
     not be considered to be a change in the capitalization of PCS); and
 
          (c) shall not, and shall not permit any of its Subsidiaries to, amend
     any term of any of its or their outstanding securities.
 
                                   ARTICLE 7
 
                            CONDITIONS TO THE MERGER
 
     SECTION 7.01. Conditions to Merger. The obligations of PCS, Merger Sub and
Arcadian to effect the Merger shall be subject to the following conditions:
 
          (a) The holders of issued and outstanding shares of Arcadian Common
     Stock and Arcadian Preferred Stock, voting as a single class, shall have
     duly adopted this Agreement, all in accordance with applicable law.
 
          (b) No statute, rule, regulation, executive order, decree or
     injunction shall have been enacted, entered, promulgated or enforced by any
     court or governmental authority that prohibits the consummation of the
     Merger substantially on the terms contemplated hereby. If any such order,
     decree or injunction shall have been issued, each party shall use its
     reasonable best efforts to remove such order, decree or injunction.
 
          (c) The Registration Statement shall have become effective in
     accordance with the provisions of the Securities Act and shall be effective
     at the Effective Time, and no stop order suspending such effectiveness
     shall have been issued and remain in effect.
 
          (d) The shares of PCS Common Stock issuable in the Merger shall have
     been approved for listing on the NYSE, The Toronto Stock Exchange and the
     Montreal Stock Exchange, subject only to official notice of issuance.
 
          (e) Any applicable waiting period under the HSR Act shall have expired
     or been terminated and any other approvals sets forth in Sections 4.03 and
     5.03 shall have been obtained, except where the failure to obtain such
     other approvals (other than the expiration or termination of the waiting
     period under the HSR Act) would not have a Material Adverse Effect on PCS
     or Arcadian, as the case may be.
 
          (f) Arcadian shall have received an opinion of its tax counsel,
     Bracewell & Patterson, L.L.P., in form and substance reasonably
     satisfactory to it, and dated within five days prior to the date of the
     Proxy Statement to the effect that neither it nor any of its stockholders
     shall recognize gain or loss for United States federal income tax purposes
     as a result of the Merger (other than the Merger Cash, cash paid in
     connection with appraisal rights and any cash paid in lieu of fractional
     shares) which opinion shall have been reconfirmed as of the date on which
     the Effective Time occurs (the "Effective Date").
 
                                      I-26
<PAGE>   28
 
          (g) PCS shall have received an opinion of its tax counsel, Goodman,
     Phillips & Vineberg, in form and substance reasonably satisfactory to it,
     and dated within five days prior to the date of the Proxy Statement, to the
     effect that the Merger will constitute a tax-free reorganization under Code
     section 368(a)(2)(D), which opinion shall have been reconfirmed as of the
     Effective Date.
 
     SECTION 7.02. Additional Conditions of PCS and Merger Sub. The obligation
of PCS and Merger Sub to effect the Merger is further subject to the conditions
that (a) the representations and warranties of Arcadian contained herein shall
be true and correct in all respects (but without regard to any materiality
qualifications contained in any specific representation or warranty) as of the
Effective Time with the same effect as though made as of such time except for
changes specifically permitted by the terms of this Agreement and except where
any such failure of the representations and warranties in the aggregate to be
true and correct in all respects as of the Effective Time would not have a
Material Adverse Effect on Arcadian, and (b) Arcadian shall have performed in
all material respects all obligations and complied in all material respects with
all covenants required by this Agreement to be performed or complied with by it
prior to the Effective Time.
 
     SECTION 7.03. Additional Conditions of Arcadian. The obligation of Arcadian
to effect the Merger is further subject to the conditions that (a) the
representations and warranties of PCS contained herein shall be true and correct
in all respects (but without regard to any materiality qualifications contained
in any specific representation or warranty) as of the Effective Time with the
same effect as though made as of the Effective Time except for changes
specifically permitted by the terms of this Agreement and except where any such
failure of the representations and warranties in the aggregate to be true and
correct in all respects as of the Effective Time would not have a Material
Adverse Effect on PCS, and (b) PCS and Merger Sub shall have performed in all
material respects all obligations and complied in all material respects with all
covenants required by this Agreement to be performed or complied with by it
prior to the Effective Time.
 
                                   ARTICLE 8
 
                   TERMINATION, WAIVER, AMENDMENT AND CLOSING
 
     SECTION 8.01. Termination or Abandonment. Notwithstanding anything
contained in this Agreement to the contrary, this Agreement may be terminated
and abandoned at any time prior to the Effective Time, whether before or after
approval of this Agreement by the stockholders of Arcadian:
 
          (a) by the mutual written consent of PCS and Arcadian;
 
          (b) by PCS or Arcadian if the Effective Time shall not have occurred
     on or before February 28, 1997; provided, that the party seeking to
     terminate this Agreement pursuant to this Section 8.01(b) shall not have
     breached in any material respect its obligations under this Agreement in
     any manner that shall have proximately contributed to the failure to
     consummate the Merger on or before such date;
 
          (c) by PCS or Arcadian if a United States federal or state court of
     competent jurisdiction or United States governmental, regulatory or
     administrative agency or commission shall have issued an order, decree or
     ruling or taken any other action permanently restraining, enjoining or
     otherwise prohibiting the transactions substantially on the terms
     contemplated by this Agreement and such order, decree, ruling or other
     action shall have become final and non-appealable; provided, that the party
     seeking to terminate this Agreement pursuant to this Section 8.01(c) shall
     have used its reasonable best efforts to remove such restraint, injunction
     or prohibition;
 
          (d) by PCS if (i) the approvals of the stockholders of Arcadian
     contemplated by this Agreement shall not have been obtained by reason of
     the failure to obtain the required vote at a duly held meeting of
     stockholders or any adjournment thereof or (ii) prior to the Special
     Meeting, the Board of Directors of Arcadian shall have withdrawn or
     modified, or resolved to withdraw or modify its approval or recommendation
     of this Agreement;
 
          (e) by Arcadian or PCS, by a written notice delivered to the other
     party on or before 5:00 p.m. (Memphis time) on the 14th day after the date
     of this Agreement, if Arcadian's or PCS's, as the case may be,
     investigation of the business and operations of the other party shall have
     revealed the existence of
 
                                      I-27
<PAGE>   29
 
     a fact or condition relating to such other party or its Subsidiaries that
     (i) is not disclosed in the PCS Disclosure Documents or the Arcadian SEC
     Documents, as the case may be, and (ii) in the terminating party's
     reasonable, good-faith judgment has had or may reasonably be expected to
     have a Material Adverse Effect on the other party in excess of any
     provision made with respect thereto in the other party's December 31, 1995
     or June 30, 1996 financial statements included in the PCS Disclosure
     Documents or Arcadian SEC Documents, as the case may be. Any such notice
     delivered pursuant to the first sentence of this Section 8.01(e) shall
     outline in reasonable detail the basis for such termination;
 
          (f) by Arcadian, if its Board of Directors shall have determined, in
     its good faith judgment after consultation with legal counsel and financial
     advisors, that such Board's fiduciary duties require termination of this
     Agreement;
 
          (g) by Arcadian, if the approval of the stockholders of Arcadian
     contemplated by this Agreement shall not have been obtained by reason of
     the failure to obtain the required vote at a duly held meeting of such
     stockholders or any adjournment thereof;
 
          (h) by Arcadian or by PCS, if the Final PCS Common Stock Price is
     either (i) less than $65.00 or (ii) greater than $90.00; and
 
          (i) by PCS, by a written notice delivered to Arcadian on or before
     5:00 p.m. Memphis time on the 14th day after the date of this Agreement
     based on PCS's reasonable determination that the cost of causing Arcadian's
     interests in Arcadian Trinidad Corporation, Arcadian Fertilizer
     Corporation, AA Sulfuric Corporation, August Service Company Inc., Arcadian
     LCD Corporation and Arcadian FMF, L.L.C. and any other interests in
     corporations or limited liability companies held by Arcadian Partners, L.P.
     or Arcadian Fertilizer L.P. to be held through a chain of corporations with
     no partnership in the chain of ownership exceeds $25,000,000 in addition to
     the costs of retiring debt (including, in the costs of retiring such debt,
     all prepayment premiums payable thereon).
 
     In the event of termination of this Agreement pursuant to this Section
8.01, this Agreement shall terminate, and there shall be no other liability
under this Agreement on the part of either party to the other party except that
(i) the obligations contained in Section 9.02 and in the Confidentiality
Agreement shall survive the termination hereof and (ii) no such termination
shall relieve either party of any liability or damages arising out of a breach
of this Agreement by that party.
 
     SECTION 8.02. Amendment or Supplement. At any time before or after approval
of this Agreement by the stockholders of Arcadian and prior to the Effective
Time, this Agreement may be amended or supplemented in writing by PCS, Merger
Sub, and Arcadian with respect to any of the terms contained in this Agreement,
except that following approval by the stockholders of Arcadian there shall be no
amendment or change to the provisions hereof with respect to the conversion
ratio of shares of Arcadian Common Stock into shares of PCS Common Stock and the
Merger Cash as provided herein nor any amendment or change not permitted under
applicable law, without further approval by the stockholders of Arcadian.
 
     SECTION 8.03. Extension of Time, Waiver, Etc. At any time prior to the
Effective Time, either PCS or Arcadian may:
 
          (a) extend the time for the performance of any of the obligations or
     acts of the other;
 
          (b) waive any inaccuracies in the representations and warranties of
     the other party contained herein or in any document delivered pursuant
     hereto; or
 
          (c) waive compliance with any of the agreements or conditions of the
     other party contained herein.
 
     Notwithstanding the foregoing, no failure or delay by PCS or Arcadian in
exercising any right hereunder shall operate as a waiver thereof nor shall any
single or partial exercise thereof preclude any other or further exercise
thereof or the exercise of any other right hereunder. Any agreement on the part
of a party hereto to any such extension or waiver shall be valid only if set
forth in an instrument in writing signed on behalf of such party.
 
                                      I-28
<PAGE>   30
 
     SECTION 8.04. Closing. The closing of the transactions contemplated by this
Agreement and the Merger Agreement shall take place at the offices of Bracewell
& Patterson, L.L.P., South Tower Pennzoil Place, 711 Louisiana Street, Suite
2900, Houston, Texas 77002, at 10:00 a.m., local time, on the Effective Date or
at such other time and place as PCS and Arcadian shall agree.
 
                                   ARTICLE 9
 
                                 MISCELLANEOUS
 
     SECTION 9.01. No Survival of Representations and Warranties. None of the
representations, warranties and agreements in this Agreement or in any
instrument delivered pursuant to this Agreement shall survive the Merger, except
for the agreements set forth in Article 3, the agreements of "affiliates" of
Arcadian to be delivered pursuant to Section 6.04, the provisions of Sections
6.07, 6.11 and 6.17 and this Article 9. Any of the current officers and
directors of Arcadian may enforce the agreements of PCS or Merger Sub set forth
in Sections 6.11 or 6.17.
 
     SECTION 9.02. Expenses. (a) Except as provided in this Section 9.02,
whether or not the Merger is consummated, all costs and expenses incurred in
connection with this Agreement, and the transactions contemplated hereby and
thereby shall be paid by the party incurring such expenses, except that the
filing fee in connection with any HSR Act filing, the commissions, transfer
taxes and other out-of-pocket transaction costs, including the expenses and
compensation of the Exchange Agent, and the expenses incurred in connection with
the printing and mailing of the Proxy Statement and the Registration Statement
and any expenses incurred by PCS relating to the issuance, registration and
listing of the PCS Common Stock and the qualification thereof under state blue
sky or securities laws, shall be shared equally by PCS and Arcadian.
 
     (b) Arcadian agrees that if this Agreement is terminated pursuant to any of
the Sections described in clauses (i) through (iii) below, Arcadian will pay PCS
an amount equal to $25,000,000, plus all out-of-pocket expenses incurred by PCS
in connection with this Agreement, the Merger and all related transactions by
wire transfer of immediately available funds promptly, but in no event later
than two business days, after such termination (or, in the case of Section
9.2(b)(iii) below, no later than two business days after the consummation of the
Third Party Acquisition Proposal):
 
          (i) Section 8.01(d)(ii);
 
          (ii) Section 8.01(f); or
 
          (iii) Section 8.01(d)(i) or 8.01(g) if, but only if, both (A) after
     the date hereof but before the date of the Special Meeting, a Third Party
     Acquisition Proposal is publicly disclosed, and (B) within one year after
     the date of such public disclosure the transaction contemplated by such
     Third Party Acquisition Proposal, or by any subsequent Third Party
     Acquisition Proposal, is consummated.
 
     SECTION 9.03. Counterparts; Effectiveness. This Agreement may be executed
in two or more counterparts, each of which shall be an original, with the same
effect as if the signatures thereto and hereto were upon the same instrument,
and shall become effective when one or more counterparts have been signed by
each of the parties and delivered (by telecopy or otherwise) to the other
parties.
 
     SECTION 9.04. Governing Law; Consent to Jurisdiction. This Agreement shall
be governed by and construed in accordance with the laws of the State of
Delaware without regard to the principles of conflicts of laws thereof. Each
party hereto irrevocably and unconditionally consents to submit to the exclusive
jurisdiction of courts of the State of Delaware or any United States district
court located in the State of Delaware for any litigation arising out of or
relating to this Agreement and the transactions contemplated hereby (and agrees
not to commence any litigation relating thereto except in such courts), waives
any objection to the laying of venue of any such litigation in such courts and
agrees not to plead or claim in any such court that such litigation brought
therein has been brought in an inconvenient forum.
 
                                      I-29
<PAGE>   31
 
     SECTION 9.05. Notices. All notices and other communications hereunder shall
be in writing (including telecopy or similar writing) and shall be effective (a)
if given by telecopy, when such telecopy is transmitted to the telecopy number
specified in this Section 9.05 and the appropriate telecopy confirmation is
received or (b) if given by any other means, when delivered at the address
specified in this Section 9.05:
 
        To PCS or Merger Sub:
 
           Potash Corporation of Saskatchewan Inc.
           Suite 500
           122-1st Avenue South
           Saskatoon, Saskatchewan S7K 7G3
           Canada
           Attention: General Counsel
           Telecopy: 306-933-8877
 
           with a copy to:
 
               James B. Halpern
               Arent Fox Kintner Plotkin & Kahn
               1050 Connecticut Avenue, NW
               Washington, DC 20036-5339
               Telecopy: 202-857-6395
 
        To Arcadian:
 
           Arcadian Corporation
           6750 Poplar Avenue, Suite 600
           Memphis, Tennessee 38138-7419
           Attention: Peter H. Kesser, Esq.
           Telecopy: 901-758-5201
 
           with a copy to:
 
               Bracewell & Patterson, L.L.P.
               South Tower, Pennzoil Place
               711 Louisiana Street, Suite 2900
               Houston, Texas 77002-2781
               Attention: John Bland, Esq.
               Telecopy: 713-221-1212
 
     SECTION 9.06. Assignment; Binding Effect. Neither this Agreement nor any of
the rights, interests or obligations hereunder shall be assigned by any of the
parties hereto (whether by operation of law or otherwise) without the prior
written consent of the other parties. Subject to the preceding sentence, this
Agreement shall be binding upon and shall inure to the benefit of the parties
hereto and their respective successors and assigns.
 
     SECTION 9.07. Severability. Any term or provision of this Agreement which
is invalid or unenforceable in any jurisdiction shall, as to that jurisdiction,
be ineffective to the extent of such invalidity or unenforceability without
rendering invalid or unenforceable the remaining terms and provisions of this
Agreement or affecting the validity or enforceability of any of the terms or
provisions of this Agreement in any other jurisdiction. If any provision of this
Agreement is so broad as to be unenforceable, such provision shall be
interpreted to be only so broad as is enforceable.
 
     SECTION 9.08. Enforcement of Agreement. The parties hereto agree that money
damages or other remedy at law would not be sufficient or adequate remedy for
any breach or violation of, or a default under, this Agreement by them and that
in addition to all other remedies available to them, each of them shall be
entitled to the fullest extent permitted by law to an injunction restraining
such breach, violation or default or
 
                                      I-30
<PAGE>   32
 
threatened beach, violation or default and to any other equitable relief,
including, without limitation, specific performance, without bond or other
security being required.
 
     SECTION 9.09. Miscellaneous. This Agreement, including the Schedules
hereto:
 
          (a) along with the Confidentiality Agreement constitutes the entire
     agreement, and supersedes all other prior agreements and understandings,
     both written and oral, between the parties, or any of them, with respect to
     the subject matter hereof and thereof; and
 
          (b) except for the provisions of Sections 6.11 and 6.17, is not
     intended to and shall not confer upon any Person other than the parties
     hereto any rights or remedies hereunder.
 
     SECTION 9.10. Headings. Headings of the Articles and Sections of this
Agreement are for the convenience of the parties only, and shall be given no
substantive or interpretive effect whatsoever.
 
     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed by their respective authorized officers as of the day and year
first above written.
 
                                            POTASH CORPORATION OF
                                            SASKATCHEWAN INC.
 
                                            By:     /s/  C. E. CHILDERS
                                              Name: C. E. Childers
                                              Title: Chief Executive Officer
 
                                            ARCADIAN CORPORATION
 
                                            By:     /s/  J. D. CAMPBELL
                                              Name: J. D. Campbell
                                              Title: President and Chief
                                                Executive Officer
 
                                            PCS NITROGEN, INC.
 
                                            By:      /s/  JOHN HAMPTON
                                              Name: John Hampton
                                              Title: Sole Incorporator
 
                                      I-31

<PAGE>   1

                                 Exhibit 10(m)


                    POTASH CORPORATION OF SASKATCHEWAN INC.

                           SHORT TERM INCENTIVE PLAN

        This Short-Term Incentive Plan (the "Plan") is intended to aid in
maintaining and developing strong management in the Potash Corporation of
Saskatchewan Inc. and its direct and indirect subsidiaries (the "Corporation")
by providing financial incentives to key employees, in addition to their basic
salaries, in recognition of their achievement of objectives which contribute
materially to the success of the Corporation's business interests.

1.      DEFINITIONS

        In this Plan, except where the context otherwise indicates, the
        following definitions apply:

        (a)     "Award Percentage" means a percentage based on the table
                contained in Schedule I and calculated in accordance with the
                formulae contained in Schedule I;

        (b)     "Board" means Board of Directors of Potash Corporation of
                Saskatchewan Inc.;

        (c)     "CEO" means the Chief Executive Officer, from time to time, of
                Potash Corporation of Saskatchewan Inc.;

        (d)     "Committee" means the Compensation Committee of the Board;

        (e)     "Entitled Employee" means a key employee of the Corporation who
                is among the managerial, professional, technical or
                administrative employees of the Corporation and is designated by
                the Committee as eligible to receive an Incentive Award under
                this Plan and which employee is in the employ of the Corporation
                as of the end of the year for which awards are to be granted;

        (f)     "Entitled Mine Employee" means an Entitled Employee who is
                attached to one of the potash or phosphate mining divisions of
                the Corporation;

        (g)     "Equity" for any year means the average of the opening and
                closing balances (after adding to the closing balance any amount
                accrued in such year in respect of Incentive Awards) for the
                fiscal year as reported in the audited financial statements of
                the Corporation for such year;

        (h)     "Incentive Awards" means financial incentives awarded to
                Entitled Employees pursuant to the Plan;

        (i)     "Net Income" for any year means the amount reported as net
                income in the audited financial statement of the Corporation
                plus research and development

<PAGE>   2

Short-Term Incentive Plan
Page 2


             expenditures, tax expenditures, plus any amount accrued in such
             year in respect of Incentive Awards, as adjusted by the Committee
             at its discretion to account for the effect of any extraordinary
             nonrecurring charges or credits;

        (j)  "Return on Equity" or "ROE" means the product obtained by first
             dividing Net Income in any year by Equity and multiplying the
             resulting quotient by 100;

        (k)  "Target ROE" means the Return on Equity projected in the approved
             budget;

        (l)  "Target Percentage" means the Award percentage at Target ROE as
             shown in the table contained in Schedule I.

        (m)  "Termination of Employment" means the cessation of employment with
             the Corporation;

        (n)  "Year" means any given fiscal year of the Corporation;

2.      LIMITATION OF AWARD OF INCENTIVES

        Generally, no Incentive Award shall be granted under this Plan with
        respect to any year in which the Return on Equity is less than 50% of
        the Target ROE; provided, however, that the Committee may elect, in its
        discretion, to make Incentive Awards in any year in which circumstances
        have prevented the Corporation from achieving 50% of the Target ROE.

3.      AWARDS GRANTABLE

        An Incentive Award is grantable with respect to any Year to any Entitled
        Employee who has not less than three months' employment with the
        Corporation during such Year.  Entitled Employees who have been employed
        by the Corporation for less than one year shall have their Incentive
        Awards prorated in accordance with their period of employment.

4.      METHOD OF DETERMINING INCENTIVE AWARDS

        (a)  Entitled Employees shall be divided into five groups as follows:

             Senior Executive Group - Senior Vice Presidents and above
             Executive Group - Vice Presidents
             Senior Management Group - Salary grade 1,200 to 1,499 (Hay Points)
             Middle Management Group - Salary grade 900 to 1,199 (Hay Points)
             Junior Management Group - Salary grade 775 to 899 (Hay Points)


<PAGE>   3
Short-Term Incentive Plan
Page 3


                Provided that the CEO may, from time to time, designate an
                employee for inclusion in one of the above-mentioned groups
                when, but for such designation, the employee would otherwise not
                be included in such group.

        (b)     Entitled Employees (except Entitled Mine Employees)

                The Incentive Award for each Entitled Employee who is not an
                Entitled Mine Employee will be the Award Percentage of the
                annual salary of such employee, with a deviation of plus or
                minus 10% of the award so determined, which deviation will be
                dependent upon the Entitled Employee's performance as determined
                by his or her supervisor and approved in accordance with the
                provisions of this Plan.

        (c)     Entitled Mine Employees

                Incentive Awards for each Entitled Mine Employee shall be the
                sum of (i) and (ii) below which amounts shall be arrived at by
                calculating:

                (i)     The award payable if calculated in accordance with the
                        provisions of paragraph 4(b), and thereafter dividing
                        the award so calculated by 2.

                (ii)    An award arrived at by calculating the Target Percentage
                        of the annual salary of such employee and adjusting that
                        award by applying a formula to be developed from time to
                        time by the CEO in consultation with the Senior Vice
                        President, Administration and the appropriate senior
                        group executive, which formula shall reasonably reflect
                        the actual results of the mining division to which the
                        employee is attached as compared to the approved budget
                        for that division, and thereafter dividing the adjusted
                        award by 2.

        (d)     General

                The Incentive Award for any Entitled Employee may exceed or be
                below the amount calculated in accordance with the foregoing
                formulae at the discretion of the CEO. Incentive Awards falling
                outside the established range shall be recommended by the CEO
                and shall be approved by the Committee in the normal course of
                administering the Incentive Compensation Plan.

5.      GRANTING AUTHORITY AND ADMINISTRATION

        The Committee shall, on the recommendation of the CEO, approve the
        number and amount of Incentive Awards for any given year within the
        three months after the end of such year. The Committee shall
        conclusively interpret the provisions of this Plan and


<PAGE>   4

Short-Term Incentive Plan
Page 4


        decide all questions of fact arising in the application. Determinations
        and interpretations in individual cases may be made by the CEO with due
        regard to consistency with any prior action by the Committee and such
        determination shall be binding and conclusive upon the individual
        employees concerned and persons claiming under them.

6.      NON-ASSIGNMENT

        Rights and Incentive Awards granted under this Plan are not assignable,
        except that in the case of the death of an Entitled Employee any
        Incentive Award which would otherwise be paid to such employee shall be
        paid to his or her estate.  Incentive Awards are not subject, in whole
        or in part, to attachment, execution or levy of any kind.

7.      AMENDMENTS

        The Board may from time to time amend this Plan, or any provision
        thereof, except that the terms and conditions of Incentive Awards which
        have been granted cannot be amended so as to adversely affect the rights
        of the grantee without his or her consent.

8.      TERM

        This Plan shall be effective on and from January 1, 1995, shall apply to
        Incentive Awards for fiscal year 1995 and thereafter, and shall
        terminate only by appropriate action of the Board.
<PAGE>   5

                                   SCHEDULE I
<TABLE>
<CAPTION>
                        AWARD PERCENTAGE AT       AWARD         AWARD PERCENTAGE AT
                           THRESHOLD ROE      PERCENTAGE AT          MAXIMUM
GROUP                   (50% OF TARGET ROE)    TARGET ROE      (150% OF TARGET ROE)
<S>                             <C>               <C>                 <C>
Senior Executive                20%               40%                 80%
Executive                       15%               30%                 60%
Senior Management               15%               20%                 40%
Middle Management               10%               15%                 30%
Junior Management                5%               10%                 20%
                                ---               ---                 ---
</TABLE>

FORMULA

        The Award Percentage shall be calculated in accordance with the
following formulae:

        (i)     Where the ROE is less than the Target ROE:

<TABLE>
                <S>                             <C>
                Senior Executive                (40%)(AROE)
                Executive                       (30%)(AROE)
                Senior Management               (10%)(AROE) +10%
                Management                      (10%)(AROE) + 5%
                Junior Management               (10%)(AROE)
</TABLE>

        (ii)    Where the ROE is equal to or greater than the Target ROE:

<TABLE>
                <S>                             <C>
                Senior Executive                (80%)(AROE) -40%
                Executive                       (60%)(AROE) -30%
                Senior Management               (40%)(AROE) -20%
                Management                      (30%)(AROE) -15%
                Junior Management               (20%)(AROE) -10%
</TABLE>

NOTES

        (i)     Adjusted ROE (AROE) =    ROE    x  100
                                      ----------
                                      Target ROE

        (ii)    Where AROE is greater than 150 (i.e. the maximum return on
                equity) the AROE is deemed to be 150.

<PAGE>   1
                                                                Exhibit 11

POTASH CORPORATION OF SASKATCHEWAN INC.
COMPUTATION OF PER SHARE EARNINGS
FOR THE PERIODS ENDED SEPTEMBER 30
(Figures and amounts expressed in thousands, except per share and per option
amounts)

<TABLE>
<CAPTION>
                                                       YTD-1996        YTD-1995        Q3-1996         Q3-1995
                                                       --------        --------        -------         -------
<S>  <C>                                               <C>             <C>             <C>             <C>
A    Net Income as reported, Canadian GAAP              162,848         122,296         46,772          23,077
B    Items adjusting net income                          (5,753)              0         (1,435)              0
C    Net income, US GAAP (A+B)                          157,095         122,296         45,337          23,077

D    Weighted average number of shares outstanding       45,525          43,202         45,549          43,567

E    Options outstanding to purchase equivalent shares    1,271             926          1,271             926

F    Average exercise price per option                    43.55           34.74          43.55           34.74

G    Average market price per share                       68.57           59.68          69.87            48.8

H    Period end market price per share                    66.25           62.25          73.13           62.25

I    Rate of Return available on option proceeds           0.05            0.05           0.05            0.05


CANADIAN GAAP

     Basic earnings per share (A/D)                        3.58            2.83           1.03            0.53

     Fully diluted earnings per share
J    Imputed earnings on option proceeds (E*F*I)          2,767           1,609          2,767           1,609

     Fully diluted earnings per share ((A+J)/(D+E))        3.54            2.81           1.06            0.55


UNITED STATES GAAP

     Primary earnings per share
K    Net additional shares issuable (E-(E*F/G))             464             387            479             267

     Primary earnings per share (C/(D+K))                  3.42            2.81           0.98            0.53

     Fully diluted earnings per share
L    Net additional shares issuable (E-(E*F/H))             435             409            514             409

     Fully diluted earnings per share (C/(D+L))            3.42            2.80           0.98            0.52

     D+K Weighted average shares for US GAAP             45,989          43,589         46,028          43,834
</TABLE>


<TABLE> <S> <C>

<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1996
<PERIOD-START>                             JAN-01-1996
<PERIOD-END>                               SEP-30-1996
<CASH>                                         108,534
<SECURITIES>                                         0
<RECEIVABLES>                                  179,851
<ALLOWANCES>                                   (4,551)
<INVENTORY>                                    189,457
<CURRENT-ASSETS>                               490,506
<PP&E>                                       2,497,880
<DEPRECIATION>                               (514,100)
<TOTAL-ASSETS>                               2,520,498
<CURRENT-LIABILITIES>                          239,638
<BONDS>                                        639,733
                                0
                                          0
<COMMON>                                       629,954
<OTHER-SE>                                     741,207
<TOTAL-LIABILITY-AND-EQUITY>                 2,520,498
<SALES>                                      1,061,388
<TOTAL-REVENUES>                             1,061,388
<CGS>                                          766,931
<TOTAL-COSTS>                                  766,931
<OTHER-EXPENSES>                                66,551
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              36,784
<INCOME-PRETAX>                                191,122
<INCOME-TAX>                                    28,274
<INCOME-CONTINUING>                                  0
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   162,848
<EPS-PRIMARY>                                     3.58
<EPS-DILUTED>                                     3.54
        

</TABLE>


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