DEKALB GENETICS CORP
SC 13D, 1996-02-05
AGRICULTURAL PRODUCTION-CROPS
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<PAGE>
                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C.  20549

                                  SCHEDULE 13D

                   UNDER THE SECURITIES EXCHANGE ACT OF 1934
                               (AMENDMENT NO.   )
                                              --

                          DEKALB Genetics Corporation

                                (Name of Issuer)

                       Class A Common Stock, no par value

                         (Title of Class of Securities)

                                  244878 10 4

                                 (CUSIP Number)

                               Douglas C. Roberts
                          DEKALB Genetics Corporation
                               3100 Sycamore Road
                             DeKalb, Illinois 60115
                                 (815) 758-3461

                     (Name, Address and Telephone Number of
            Person Authorized to Receive Notices and Communications)

                                January 31, 1996
                         (Date of Event which Requires
                           Filing of this Statement)

     If the filing person has previously filed a statement on Schedule 13G to
report the acquisition which is the subject of this Schedule 13D, and is filing
this schedule because of Rule 13d-1(b)(3) or (4), check the following box [ ].

     Check the following box if a fee is being paid with the statement [X].  (A
fee is not required only if the reporting person: (1) has a previous statement
on file reporting beneficial ownership of more than five percent of the class of
securities described in Item 1; and (2) has filed no amendment subsequent
thereto reporting beneficial ownership of five percent or less of such class.)
(See Rule 13d-7.)

          NOTE: Six copies of this statement, including all exhibits, should be
     filed with the Commission.  See Rule 13d-1(a) for other parties to whom
     copies are to be sent.

               (Continued on the following pages)
                      (Page 1 of 21 Pages)




<PAGE>
     1    NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

          Douglas C. Roberts
          ###-##-####

     2    CHECK THE APPROPRIATE BOX IF A MEMBER OF GROUP  (a) [X]
                                                          (b) [ ]

     3    SEC USE ONLY

     4    SOURCE OF FUNDS

          00

     5    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
          REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)             [ ]

     6    CITIZENSHIP OR PLACE OF ORGANIZATION

          United States of America

               7    SOLE VOTING POWER

                         -0-




   NUMBER OF
    SHARES          8    SHARED VOTING POWER
 BENEFICIALLY
   OWNED BY              445,275
     EACH
   REPORTING   9    SOLE DISPOSITIVE POWER
    PERSON
     WITH                137,769

               10   SHARED DISPOSITIVE POWER

                         -0-

     11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
          PERSON

          447,642

     12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
          CERTAIN SHARES                                      [ ]

     13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

          58.5%

     14   TYPE OF REPORTING PERSON




          IN


<PAGE>
     1    NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

          Virginia Roberts Holt
          ###-##-####

     2    CHECK THE APPROPRIATE BOX IF A MEMBER OF GROUP  (a) [X]
                                                          (b) [ ]

     3    SEC USE ONLY

     4    SOURCE OF FUNDS

          00

     5    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
          REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)             [ ]

     6    CITIZENSHIP OR PLACE OF ORGANIZATION

          United States of America




               7    SOLE VOTING POWER

                         -0-
   NUMBER OF
    SHARES          8    SHARED VOTING POWER
 BENEFICIALLY
   OWNED BY              445,275
     EACH
   REPORTING   9    SOLE DISPOSITIVE POWER
    PERSON
     WITH                137,672

               10   SHARED DISPOSITIVE POWER

                         -0-

     11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
          PERSON

          446,934

     12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
          CERTAIN SHARES                                      [ ]

     13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
          58.5%





     14   TYPE OF REPORTING PERSON
          IN
<PAGE>
     1    NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

          John T. Roberts
          ###-##-####

     2    CHECK THE APPROPRIATE BOX IF A MEMBER OF GROUP  (a) [X]
                                                          (b) [ ]

     3    SEC USE ONLY

     4    SOURCE OF FUNDS

          00

     5    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
          REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)             [ ]

     6    CITIZENSHIP OR PLACE OF ORGANIZATION

          United States of America




               7    SOLE VOTING POWER

                         -0-
   NUMBER OF
    SHARES          8    SHARED VOTING POWER
 BENEFICIALLY
   OWNED BY              445,275
     EACH
   REPORTING   9    SOLE DISPOSITIVE POWER
    PERSON
     WITH                136,414

               10   SHARED DISPOSITIVE POWER

                         -0-

     11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
          PERSON

          452,271

     12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
          CERTAIN SHARES                                      [ ]

     13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)




          58.8%

     14   TYPE OF REPORTING PERSON
          IN
<PAGE>
     1    NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

          Charles C. Roberts
          ###-##-####

     2    CHECK THE APPROPRIATE BOX IF A MEMBER OF GROUP  (a) [X]
                                                          (b) [ ]

     3    SEC USE ONLY

     4    SOURCE OF FUNDS

          00

     5    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
          REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)             [ ]

     6    CITIZENSHIP OR PLACE OF ORGANIZATION

          United States of America





               7    SOLE VOTING POWER

                         -0-
   NUMBER OF
    SHARES          8    SHARED VOTING POWER
 BENEFICIALLY
   OWNED BY              445,275
     EACH
   REPORTING   9    SOLE DISPOSITIVE POWER
    PERSON
     WITH                -0-

               10   SHARED DISPOSITIVE POWER

                         23,505

     11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
          PERSON

          445,275

     12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
          CERTAIN SHARES                                      [ ]

     13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)





          58.4%

     14   TYPE OF REPORTING PERSON
          IN
<PAGE>
     1    NAME OF REPORTING PERSON
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

          Mary R. Roberts
          ###-##-####

     2    CHECK THE APPROPRIATE BOX IF A MEMBER OF GROUP  (a) [X]
                                                          (b) [ ]

     3    SEC USE ONLY

     4    SOURCE OF FUNDS

          00

     5    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
          REQUIRED PURSUANT TO ITEMS 2(d) OR 2(e)             [ ]

     6    CITIZENSHIP OR PLACE OF ORGANIZATION




          United States of America

               7    SOLE VOTING POWER

                         -0-
   NUMBER OF
    SHARES          8    SHARED VOTING POWER
 BENEFICIALLY
   OWNED BY              445,275
     EACH
   REPORTING   9    SOLE DISPOSITIVE POWER
    PERSON
     WITH                -0-

               10   SHARED DISPOSITIVE POWER

                         23,505

     11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING

          PERSON

          445,275

     12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
          CERTAIN SHARES                                      [ ]





     13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

          58.4%

     14   TYPE OF REPORTING PERSON
          IN


<PAGE>
ITEM 1.  SECURITY AND ISSUER.
         -------------------


          This Schedule 13D (this "Schedule") relates to shares of Class A
Common Stock, no par value ("Class A Common Stock"), of DEKALB Genetics
Corporation, a Delaware corporation (the "Company").  The principal executive
offices of the Company are located at 3100 Sycamore Road, DeKalb, Illinois
60115.


ITEM 2.  IDENTITY AND BACKGROUND.
         -----------------------


          This Schedule is filed by Douglas C. Roberts, Virginia Roberts Holt,
John T. Roberts, Charles C. Roberts and Mary R. Roberts (collectively, the
"Filing Persons") to report the beneficial ownership of shares of Class A Common
Stock.





          Douglas C. Roberts is a United States citizen whose address is 1449
Janet Street, Sycamore, Illinois 60178.  He is Vice President-Marketing of the
Company.  He is also a director of the Company and a member of its Executive
Committee.

          Virginia Roberts Holt is a United States citizen whose address is 2329
Clover Lane, Northfield, Illinois 60093.  She is President of Charles A. Lowe &
Associates, a firm which sells hearing aids and whose principal offices are
located at 8 South Michigan Avenue, Suite 1108, Chicago, Illinois 60603.  She is
also a director of the Company

          John T. Roberts is a United States citizen whose address is 7602 E.
88th Place, Suite A, Indianapolis, Indiana 46256.  He is Chief Financial Officer
and Treasurer of Quest Environmental Resources Corporation, a distributor of
environmental safety products and whose principal offices are located at 7602 E.
88th Place, Suite A, Indianapolis, Indiana 46256.  He is also a director of the
Company and a member of its Compensation Committee.

          Charles C. Roberts is a United States citizen whose address is 2657
Greenwood Acres Drive, DeKalb, Illinois 60115. He is retired.

          Mary R. Roberts is a United States citizen whose address is 2657
Greenwood Acres Drive, DeKalb, Illinois 60115. She is a housewife.




          During the last five years none of the Filing Persons (i) has been
convicted in a criminal proceeding (excluding traffic violations or similar
misdemeanors) or (ii) has been a party to a civil proceeding of a judicial or
administrative body
<PAGE>
of competent jurisdiction, as a result of which such person was or is subject to
a judgment, decree or final order enjoining future violations of, or prohibiting
or mandating activities subject to, federal or state securities laws or finding
any violations with respect to such laws.


ITEM 3.  SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.
         -------------------------------------------------


          Pursuant to the terms of the Voting Trust Agreement described in Item
4, the Class A Common Stock reported in this Schedule were transferred to each
of the Filing Persons, as voting trustees (the "Voting Trustees"), for deposit
pursuant to the Voting Trust Agreement.  The Voting Trustees are required to
issue trust certificates ("Trust Certificates") for the shares of Class A Common
Stock deposited pursuant to the Voting Trust Agreement.  Except for such Trust
Certificates, no consideration was paid in connection with such transfers.


ITEM 4.  PURPOSE OF TRANSACTION.
         ----------------------




          The Filing Persons acquired beneficial ownership of the Class A Common
Stock reported in this Schedule as part of the transactions described below.
Each of the Filing Persons is holding the Class A Common Stock which it
beneficially owns for investment.

          On January 31, 1996, each of the Filing Persons, individually and as
trustees of trusts created for the benefit of their spouses or children (the
Filing Persons and such trusts being referred to as the "Shareholders") executed
and delivered (i) a Voting Trust Agreement (the "Voting Trust Agreement") among
the Shareholders,(ii) a Roberts Family Shareholder Agreement (the "Family
Shareholder Agreement") among the Shareholders and (iii) a Stockholders'
Agreement (the "Monsanto Stockholders' Agreement") among the Shareholders and
Monsanto Company ("Monsanto").  The following summaries of the Voting Trust
Agreement, the Family Shareholder Agreement and the Monsanto Stockholders'
Agreement do not purport to be complete and are qualified in their entirety by
reference to such agreements,


copies of which have been filed as Exhibits to this Schedule and are
incorporated herein by reference.
<PAGE>

VOTING TRUST AGREEMENT

          Pursuant to the terms of the Voting Trust Agreement, the shares of
Class A Common Stock reported in this Schedule were transferred to each of the




Filing Persons, as Voting Trustees, for deposit pursuant to the Voting Trust
Agreement.  Any Shareholder who subsequently acquires any shares of Class A
Common Stock of the Company will deposit such shares with the Voting Trustees to
be held pursuant to the Voting Trust Agreement (any shares deposited with the
Voting Trustees pursuant to the Voting Trust Agreement are referred to as
"Subject Shares").  The Voting Trustees are not required to recognize any
transfer of any Trust Certificate not made in accordance with the Family
Shareholder Agreement and the Monsanto Stockholders' Agreement.

          The Voting Trust Agreement provides that the Voting Trustees will have
full right and power to vote all Subject Shares upon all matters submitted to a
vote or consent of shareholders of the Company.  The Voting Trustees will vote
all Subject Shares as a unit in accordance with the determination of a majority
of the Voting Trustees (or, if only two Voting Trustees are acting, as they
agree), except that with respect to the Investment Agreement Matters (as defined
herein under "-- Monsanto Stockholders' Agreement") or business combinations (as
defined in the Monsanto Stockholders' Agreement) involving the Company ("Company
Business Combinations"), the Voting Trustees will vote in accordance with the
instructions of holders of Trust Certificates or, if no instructions are given,
in accordance with the recommendation of the Board of Directors of the Company.

          All dividends or distributions upon the Subject Shares will be paid by
the Voting Trustees to the holders of Trust Certificates ratably based on the
number of Subject Shares reflected on the Trust Certificates, except that any
dividend or distribution of voting stock of the Company will be deposited
pursuant to the Voting Trust Agreement.





          The Voting Trustees have no power to sell or otherwise dispose of any
Subject Shares, except that the Voting Trustees are required to tender or
exchange Subject Shares in accordance with the terms of any tender or exchange
offer if (i) the Voting Trustees are so instructed by the holder of the Trust
Certificate for such Subject Shares and (ii) such tender or exchange offer, if
consummated, would result in the beneficial ownership by a
group or person of all of the shares of Class A Common Stock and all of the
shares of Class B Common Stock of the Company ("Class B Common Stock") and the
Company has previously published its
<PAGE>
position or recommendation with respect to such tender or exchange offer
pursuant to applicable rules under the Securities Exchange Act of 1934, as
amended (any such tender or exchange offer described in this clause (ii) being
referred to as a "Qualifying Tender Offer").

          The Voting Trust Agreement will terminate with respect to any Subject
Share on the earliest to occur of (i) the withdrawal of such Subject Share in
accordance with the provisions of the Family Shareholder Agreement, (ii) the
written agreement of all Voting Trustees and (iii) when the voting of such
Subject Share ceases to be vested in the Voting Trustees.


FAMILY SHAREHOLDER AGREEMENT




          The Family Shareholder Agreement provides that no Shareholder will
sell, withdraw from the Voting Trust Agreement or otherwise dispose of any
interest in Subject Shares except as provided in the Family Shareholder
Agreement.  Each Shareholder has agreed not to sell, convey, transfer, assign or
otherwise dispose of ("transfer") any interest in any Class A Common Stock or
other voting common or voting preferred stock of the Company, any option,
warrant or other right to acquire Class A Common Stock or such other voting
stock or any security exchangeable for or convertible into Class A Common Stock
or such other voting stock (collectively, "Company Voting Stock"), unless such
Shareholder has withdrawn the Subject Shares from the Voting Trust Agreement
after compliance with the procedures described in the following paragraph.

          Any Shareholder desiring to withdraw Subject Shares from the Voting
Trust Agreement must give written notice to the other Shareholders, each of whom
will then have an option to purchase his or her pro rata portion of such Subject
Shares at a market price based on a thirty day average of the daily closing
prices for the Class B Common Stock on the Nasdaq National Market System
("Nasdaq")(or, if there is no such market price, an appraised value for such
Subject Shares).  If such other Shareholders have not elected to acquire all of
such Subject Shares, then each Shareholder who elected to acquire Subject Shares
will have a further option to purchase his or her pro rata portion of the
Subject Shares which such other Shareholders have not elected to acquire.  Any
Subject Shares not acquired by such other Shareholders after such further option
may be withdrawn
<PAGE>




from the Voting Trust Agreement and will no longer be subject to the Family
Shareholder Agreement.

          The Family Shareholder Agreement provides that the restrictions on
transfer therein will not apply to certain permitted transfers ("Permitted
Transfers") specified therein, including (i) certain pledges of Company Voting
Stock, (ii) a transfer of Company Voting Stock to other Shareholders or other
spouses, descendants or certain other trusts or other entities, (iii) any
exchange, conversion or transfer of Company Voting Stock in connection with a
Company Business Combination (as defined below) other than any agreement to
transfer prior to the Company's execution of an agreement with respect to such
Company Business Combination or (iv) any tender or exchange in accordance with
the terms of a Qualifying Tender Offer.

          The Family Shareholder Agreement will terminate on January 31, 2006.


MONSANTO STOCKHOLDERS' AGREEMENT

          Background.  The Monsanto Stockholders' Agreement was entered into in
          ----------

connection with a series of agreements between the Company and Monsanto,
including an Investment Agreement (the "Investment Agreement") which provides
for, among other things, (a) the issuance and sale by the Company to Monsanto at
the closing under the Investment Agreement (the "Closing") of (i) a number of
newly issued shares of Class A Common Stock equal to ten percent of the




outstanding shares of Class A Common Stock immediately after such issuance and
(ii) 378,000 newly issued shares of Class B Common Stock and (b) a tender offer
by Monsanto to purchase up to 1,800,000 shares of Class B Common Stock (the
"Monsanto Offer").  The Monsanto Stockholders' Agreement will be effective as of
the Closing and if the Investment Agreement is terminated prior to the Closing,
the Monsanto Stockholders' Agreement will be null and void.

          The Company and Monsanto also entered into a Collaboration Agreement
and License (the "Collaboration Agreement") providing for, among other things, a
research and development collaboration in the field of agricultural
biotechnology, particularly corn and soybean seed, and entered into nonexclusive
cross-licensing agreements covering herbicide-tolerant and insect-resistant corn
products.


<PAGE>
          The Investment Agreement provides, among other things, that (i) after
the Closing Monsanto will be entitled to nominate one additional member to the
Company's Board of Directors and that if Monsanto acquires 20% or more of the
outstanding Common Stock of the Company pursuant to the Monsanto Offer and the
Investment Agreement, Monsanto may nominate for election in January 1997 an
additional member to the Company's Board (any such nominee or nominees being
referred to as "Monsanto Nominees"), (ii) the By-Laws of the Company will be
amended to (a) state that the primary business of the Company is the research-
based production, marketing, licensing and sale of agronomic seed, including
both technology related thereto and products derived therefrom, (b) state that




the use of voting securities by the Company to facilitate strategic
collaborations is in the Company's best interests (but as to any one strategic
collaboration the maximum amount of voting securities of the Company to be
issued to any individual, entity or group will not exceed 10% of the voting
securities of the Company then outstanding) and (c) prohibit the Company from
acquiring any business or assets outside of such primary business that would
constitute a substantial part (as defined in the Investment Agreement) of the
Company; provided that such By-Law amendments would permit the Company to change
         --------

its primary business, issue voting securities to facilitate a strategic
collaboration or acquire any business outside of such primary business unless
three (two prior to the Company's 1997 annual meeting of stockholders) of the
members of the Board vote against the resolution relating to such change or
transaction (such By-Law provisions described in this clause (ii) being referred
to as the "By-Law Provisions") and (iii) after the Closing, while Monsanto
beneficially owns either 5% of the Class A Common Stock or 20% of the Class B
Common Stock, if the Company proposes to issue for cash (subject to specified
limitations) any shares of Common Stock, securities convertible into such shares
or options, warrants or rights to acquire such shares ("Equity"), Monsanto will
have the right to purchase all or any portion of its pro rata share of such
Equity on the terms set forth in the Investment Agreement (the provisions
described in this clause (iii) being referred to as the "Equity Purchase
Provisions" and the provisions described in clauses (i), (ii) and (iii) being
referred to as the "Investment Agreement Matters").




          The foregoing summarizes only certain provisions of the Investment
Agreement and related agreements and is not a complete summary of the Investment
Agreement or such related agreements.
<PAGE>
Copies of the Investment Agreement and related agreements have been or will be
publicly filed by the Company.

          Provisions of Monsanto Stockholders' Agreement.  The Monsanto
          ----------------------------------------------

Stockholders' Agreement provides that each Shareholder will use best efforts to
attend each stockholder meeting for purposes of establishing a quorum and will
vote all of its shares of Company Voting Stock in favor of any Monsanto Nominee
recommended by the Board of Directors of the Company, provided that such
Monsanto Nominee is reasonably satisfactory to the Company.  In addition, the
Monsanto Stockholders' Agreement provides that each Shareholder will not,
without the consent of Monsanto, initiate any action that would result in the
amendment of the By-Law Provisions and that each Shareholder will vote its
Company Voting Stock in favor of any proposed amendment to the Company's
certificate of incorporation to increase the Company's authorized capital stock,
which amendment is required in order for the Company to comply with the Equity
Purchase Provisions.  Monsanto has agreed to indemnify the Shareholders and
related persons from and against all claims, losses and liabilities which arise
from or in connection with actions or inactions in the performance of the
obligations of the Shareholders under the provisions described in this
paragraph.




          The Monsanto Stockholders' Agreement provides that except for
Permitted Transfers (i) no Shareholder may transfer any interest in its Company
Voting Stock except as provided by the Monsanto Stockholders' Agreement, (ii)
with limited exceptions, no Shareholder will convert any Class A Common Stock to
Class B Common Stock until such time as such Shareholder has entered into a
binding agreement to sell or convey such Class B Common Stock to a third party
and (iii) no Shareholder will tender any of its Company Voting Stock in the
Monsanto Offer.

          If any Shareholder desires to transfer any interest in its Company
Voting Stock (other than a Permitted Transfer) such Shareholder will make a
written offer to Monsanto (a "Shareholder Offer") to purchase such Company
Voting Stock and Monsanto will have the option to purchase all but not less than
all of such Company Voting Stock for the price and upon the terms upon which
such Shareholder proposes to transfer such Company Voting Stock.  If Monsanto
rejects the Shareholder Offer, Monsanto has the exclusive right for a period of
time to propose alternative terms for such purchase.  If Monsanto does not
accept the Shareholder Offer and Monsanto and such Shareholder have not
otherwise reached an agreement regarding such purchase within such time
<PAGE>
period, then such Shareholder may offer and sell such Company Voting Stock to
any person or entity on terms that are at least as favorable to such Shareholder
as those set forth in the
Shareholder Offer or those offered by Monsanto in any counter offer.




          In the event of any involuntary transfer of any Company Voting Stock
(other than a Permitted Transfer), Monsanto will have an exclusive option to
purchase all but not less than all of the Company Voting Stock in cash at a
purchase price (i) based on a thirty day average of the daily closing prices for
the Class B Common Stock on Nasdaq or (ii) if the Company Voting Stock is not
Class A Common Stock or if the Class B Common Stock is not publicly traded,
based on the fair market value thereof determined by an investment banking firm.

          The Monsanto Stockholders' Agreement will be effective until the
earlier of (i) the termination of the Collaboration Agreement (except if it is
terminated by reason of a material breach thereof by the Company or by reason of
a governmental decree caused by voluntary action of the Company), (ii) Monsanto
owning less than 5% of the outstanding Class A Common Stock or less than 50% of
the highest percent of the outstanding Common Stock beneficially owned by
Monsanto after completion of the Monsanto Offer, the Closing and any purchases
in the market of Class B Common Stock by Monsanto as permitted under the
Investment Agreement during the one year period after the Closing, (iii) the
termination of the Investment Agreement or (iv) the eleventh anniversary of the
Closing or any subsequent anniversary of the Closing upon notice by Monsanto or
a majority in interest of the Company Voting Stock by persons who are then
Shareholders.

ITEM 5.  INTEREST IN SECURITIES OF THE ISSUER.
         ------------------------------------




          (a)  The beneficial ownership of shares of Class A Common Stock by
each of the Filing Persons is set forth below.

Douglas C. Roberts
- ------------------


          Douglas C. Roberts has beneficial ownership of 447,642 shares of Class
A Common Stock.  Such shares represent approximately 58.5% of the issued and
outstanding shares of Class A Common Stock at the date hereof and include
445,275 shares held pursuant to the Voting Trust Agreement and 2,367 shares
subject to options which may be acquired on or prior to March 31, 1996.



<PAGE>
- ------
Virginia Roberts Holt
- ---------------------


          Virginia Roberts Holt has beneficial ownership of 446,934 shares of
Class A Common Stock.  Such shares represent approximately 58.5% of the issued
and outstanding shares of Class A Common Stock at the date hereof and include
445,275 shares held pursuant to the Voting Trust Agreement and 1,659 shares
subject to options which may be acquired on or prior to March 31, 1996.




John T. Roberts
- ---------------


          John T. Roberts has beneficial ownership of 452,271 shares of Class A
Common Stock.  Such shares represent approximately 58.8% of the issued and
outstanding shares of Class A Common Stock at the date hereof and include
445,275 shares held pursuant to the Voting Trust Agreement and 6,996 shares
subject to options which may be acquired on or prior to March 31, 1996.

Charles C. Roberts
- ------------------


          Charles C. Roberts has beneficial ownership of 445,275 shares of Class
A Common Stock.  Such shares represent approximately 58.4% of the issued and
outstanding shares of Class A Common Stock at the date hereof and are held
pursuant to the Voting Trust Agreement.

Mary R. Roberts
- ---------------


          Mary R. Roberts has beneficial ownership of 445,275 shares of Class A
Common Stock.  Such shares represent approximately 58.4% of the issued and
outstanding shares of Class A Common Stock at the date hereof and are held
pursuant to the Voting Trust Agreement.




          (b)  At the date hereof, each of the Filing Persons has shared voting
power with respect to the 445,275 shares of Class A Common Stock held pursuant
to the Voting Trust Agreement.  The power of each Filing Person to dispose of
shares of Class A Common Stock is set forth below.



Douglas C. Roberts
- ------------------


          At the date hereof, Douglas C. Roberts has sole dispositive power with
respect to 137,769 shares of Class A Common Stock.  He holds title to 116,769 of
such shares as sole
<PAGE>
trustee of a trust of which he is the sole beneficiary (the "Douglas C. Roberts
Trust").  He holds title to 21,000 of such shares as sole trustee of trusts for
the benefit of his children.

Virginia Roberts Holt
- ---------------------


          At the date hereof, Virginia Roberts Holt has sole dispositive power
with respect to 137,672 shares of Class A Common Stock.  She holds title to
123,672 of such shares as sole trustee of a trust of which she is the sole
beneficiary (the "Virginia Roberts Holt Trust").  She holds title to 14,000 of
such shares as sole trustee of trusts for the benefit of her children.




John T. Roberts
- ---------------


          At the date hereof, John T. Roberts has sole dispositive power with
respect to 136,414 shares of Class A Common Stock.  He holds title to 122,414 of
such shares as sole trustee of a trust of which he is the sole beneficiary (the
"John T. Roberts Trust").  He holds title to 14,000 of such shares as sole
trustee of trusts for the benefit of his children.

Charles C. Roberts
- ------------------


          At the date hereof, Charles C. Roberts shares dispositive power with
Mary R. Roberts with respect to 23,505 shares of Class A Common Stock.  He holds
title to 10,113 of such shares as co-trustee of a trust of which he and Mary R.
Roberts are the sole beneficiaries (the "Charles C. Roberts and Mary R. Roberts
Trust").  He holds title to 13,392 of such shares as co-trustee of trusts for
the benefit of his children (Douglas C. Roberts, Virginia Roberts Holt and John
T. Roberts) and their descendants.






Mary R. Roberts
- ---------------




          At the date hereof, Mary R. Roberts shares dispositive power with
Charles C. Roberts with respect to 23,505 shares of Class A Common Stock.  She
holds title to 10,113 of such shares as co-trustee of the Charles C. Roberts and
Mary R. Roberts Trust.  She holds title to 13,392 of such shares as co-trustee
of trusts for the benefit of her children (Douglas C. Roberts, Virginia Roberts
Holt and John T. Roberts) and their descendants.
<PAGE>
          (c)  Other than as described in Item 3 and except as described in this
Item 5(c), none of the Filing Persons has effected any transaction in Class A
Common Stock during the past 60 days.  The information set forth in Item 3 is
incorporated herein.

          On December 18, 1995, Charles C. Roberts and Mary R. Roberts, as co-
trustees of the Charles C. Roberts and Mary R. Roberts Trust, exchanged:  (i)
4,800 shares of Class A Common Stock for 4,800 shares of Class B Common Stock
held by the Douglas C. Roberts Trust; (ii) 4,800 shares of Class A Common Stock
for 4,800 shares of Class B Common Stock held by the Virginia Roberts Holt
Trust; and (iii) 4,833 shares of Class A Common Stock for 4,833 shares of Class
B Common Stock held by the John T. Roberts Trust.

          (d)  No other person has the right to receive or the power to direct
the receipt of dividends from, or the proceeds from the sale of the shares of
Class A Common Stock reported herein, except that:

          (i) the children of Douglas C. Roberts have an economic interest in
     22,618 of the shares described in Item 5(a) above;





          (ii) the children of Virginia Roberts Holt have an economic interest
     in 17,598 of the shares described in Item 5(a) above; and

          (iii) the children of John T. Roberts have an economic interest in
     18,699 of the shares described in Item 5(a) above.

          (e)  Not applicable.



ITEM 6.  CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT
         ---------------------------------------------------------------------

TO SECURITIES OF THE ISSUER.
- ---------------------------


          The information set forth in Items 3 and 4 is incorporated herein.


ITEM 7.  MATERIAL TO BE FILED AS EXHIBITS.
         --------------------------------


<PAGE>
99.1      Roberts Family Voting Trust Agreement, dated as of January 31, 1996.

99.2      Roberts Family Shareholder Agreement, dated as of January 31, 1996.




99.3      Stockholders' Agreement, dated as of January 31, 1996.

99.4      Joint Filing Agreement.


<PAGE>
          After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.


February 2, 1996


Douglas C. Roberts
- ------------------

Douglas C. Roberts


<PAGE>
          After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.


February 2, 1996






Virginia Roberts Holt
- ---------------------

Virginia Roberts Holt


<PAGE>
          After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.


February 2, 1996


John T. Roberts
- ---------------

John T. Roberts


<PAGE>
          After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.




February 2, 1996


Charles C. Roberts
- ------------------

Charles C. Roberts


<PAGE>
          After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.


February 2, 1996


Mary R. Roberts
- ---------------

Mary R. Roberts



<PAGE>

                         ROBERTS FAMILY
                         --------------




                     VOTING TRUST AGREEMENT
                     ----------------------



          THIS VOTING TRUST AGREEMENT (the "Agreement"), made and entered into
as of the 31st day of January, 1996, by and among Douglas C. Roberts, Virginia
R. Holt, John T. Roberts, Charles C. Roberts and Mary R. Roberts, the initial
voting trustees hereunder (the "Voting Trustees"); and Douglas C. Roberts,
individually and as Trustee of (i) the Douglas C. Roberts Trust dated January
28, 1972, (ii) the David Kim Roberts 1989 Trust, (iii) the Steven Suh Roberts
1989 Trust, and (iv) the Jeffrey King Roberts 1989 Trust; Virginia R. Holt,
individually and as Trustee of (i) the Virginia R. Holt Trust dated August 22,
1973, (ii) the Amanda Mary Holt 1989 Trust, and (iii) the Laura Elizabeth Holt
1989 Trust; John T. Roberts, individually and as Trustee of (i) the John T.
Roberts Trust dated April 9, 1976, (ii) the Allison Elizabeth Roberts 1989
Trust, and (iii) the Katherine Elsie Roberts 1990 Trust Number 1; Charles C.
Roberts and Mary R. Roberts, as Trustees of (i) the Charles C. and Mary R.
Roberts Living Trust dated October 15, 1991, (ii) the Trust

<PAGE>
F/B/O Douglas C. Roberts under Eleanor T. Roberts Charitable Trust Agreement
dated December 21, 1967, (iii) the Trust F/B/O Virginia R. Holt under Eleanor T.
Roberts Charitable Trust
Agreement dated December 21, 1967, and (iv) the Trust F/B/O John T. Roberts
under Eleanor T. Roberts Charitable Trust Agreement dated December 21, 1967;
Lynne King Roberts, as Trustee of the David Kim Roberts Trust dated October 14,




1987; Terrance K. Holt, as Trustee of the Amanda Mary Holt Trust dated December
6, 1985; and Robin R. Roberts, as Trustee of (i) the Allison Elizabeth Roberts
Trust dated August 6, 1986, (ii) the Katherine Elsie Roberts Trust dated March
13, 1990, and (iii) the Charles David Roberts Trust dated February 28, 1994
(collectively, the "Depositors", and individually, a "Depositor").

                      W I T N E S S E T H:

          WHEREAS, the Depositors are owners of legal title to Class A Common
Stock (the "Common Stock") of DeKalb Genetics Corporation, a Delaware
corporation (the "Company"), and deem it to be in their mutual best interests to
confer upon the Voting Trustees the right to vote and to act with respect to
such Common Stock, subject to the terms and conditions of this Agreement; and


<PAGE>
          WHEREAS, each Depositor is depositing, in accordance with this
Agreement, all shares of Common Stock that he or she now owns (the "Subject
Shares"), a list of which is attached hereto as Exhibit A.

          NOW, THEREFORE, in consideration of the foregoing and the agreements
hereinafter set forth, the parties hereto agree as follows:

          1.   Deposit of Common Stock with Voting Trustees.   Concurrently with
               --------------------------------------------

the execution and delivery of this Agreement, the Depositors shall deliver the




certificates representing the Subject Shares to the Voting Trustees, duly
endorsed by, or accompanied by instruments of transfer in form satisfying the
requirements established by the Company for transfer of shares of its Common
Stock executed by, such Depositors or their attorneys duly authorized in
writing, with a signature guarantee acceptable to the Company, and the Voting
Trustees shall deliver such certificates and instruments of transfer to the
Company with a letter of direction to cancel such certificates and to issue and
deliver to the Voting Trustees, in exchange for the certificate or certificates
standing in the name of the Depositors and delivered by the Voting Trustees, a
certificate or certificates
registered in the name of the Voting Trustees and representing the Subject
Shares.  In addition, any Depositor who acquires any Common Stock after the date
of this Agreement shall deposit such Common Stock with the Voting Trustees
within thirty (30) days after having acquired such Common Stock by transferring
such Common Stock to the Voting Trustees according to the provisions of this
Section 1.  Any such after-acquired shares of Common Stock that are so deposited
with the Voting Trustees are included in, and covered by, any reference to
Subject Shares in the rest of this Agreement.  The Voting Trustees and the
Depositors acknowledge and agree that (a) each such delivery to the Voting
<PAGE>
Trustees hereunder shall constitute a deposit on behalf of the Depositor of the
Depositor's Subject Shares with the Voting Trustees for purposes of Delaware
Code Annotated Title 8, Section 218 (1995) and (b) upon each such deposit the
right to vote such shares of Common Stock shall be vested in the Voting Trustees
until January 31, 2006, all upon the terms and conditions stated in this
Agreement.  Each certificate so issued to the Voting Trustees shall state that




it is issued pursuant to this Agreement, and that fact shall also be stated in
the stock ledger of the Company.



          2.   Issuance of Trust Certificates.  As and when the Voting Trustees
               ------------------------------

shall receive from the Company on behalf of a Depositor certificates
representing shares of Common Stock registered in the name of the Voting
Trustees, the Voting Trustees shall issue and deliver to such Depositor a trust
certificate or certificates substantially in the form of Exhibit B attached
hereto (hereinafter called "Trust Certificates") for the number of shares of
Common Stock deposited on behalf of such Depositor, and such Depositor shall be
recorded in the book or books of the Voting Trustees kept pursuant to Section 3
hereof as the registered holder of such Trust Certificates.

          3.   Transfer of Trust Certificates.  The persons who are or who shall
               ------------------------------

become from time to time the registered holders of record of Trust Certificates
(hereinafter called "Registered Holders") shall be treated by the Voting
Trustees as being the
<PAGE>
absolute owner of the Common Stock deposited pursuant to this Agreement, no
other person shall be recognized as having any right, title or interest in such
Common Stock, and the Voting Trustees shall not be affected by any notice to the
contrary.  The Voting Trustees shall keep a book or books at the office of the
Voting Trustees located c/o Douglas C. Roberts, DeKalb




Genetics Corporation, 3100 Sycamore Road, DeKalb, Illinois 60115, or such other
place as the Voting Trustees may specify in a notice given to all Registered
Holders when, if ever, such location is changed.  Such book or books shall
record the issuance and any transfer of Trust Certificates and shall contain the
names and addresses of Registered Holders and the number of shares of Common
Stock represented by the Trust Certificates in their names.  Subject to the
following paragraphs of this Section 3, upon surrender of any Trust Certificate
duly endorsed by, or accompanied by instruments of transfer in form reasonably
satisfactory to the Voting Trustees executed by, the Registered Holder or his or
her attorney duly authorized in writing, with signatures guaranteed by a bank or
member firm of the New York Stock Exchange, the Voting Trustees shall cause such
Trust Certificate to be canceled and a new Trust Certificate or Certificates to
be issued and registered in such books and in the name of the transferee or
transferees of such surrendered Trust Certificate, subject to any reasonable
rules established for that purpose by the Voting Trustees; and such transferee
or transferees shall thereby become Registered Holders and parties to, and bound
by the terms and conditions (other than the first sentence of Section 1) of,
this Agreement.
<PAGE>
          The Subject Shares and interests therein are subject to restrictions
on the transfer thereof, which restrictions have been set forth in the Roberts
Family Shareholder Agreement dated as of January 31, 1996, among the Depositors
(the "Shareholder Agreement"), and the Stockholders' Agreement, dated as of
January 31, 1996, among the Depositors, the Voting Trustees and Monsanto Company
(the "Monsanto Agreement"), each of which is on file with the Voting Trustees
for this purpose.





          The Voting Trustees shall not be required to recognize the transfer of
any Trust Certificate not made in accordance with the provisions of this
Agreement, the Shareholder Agreement and the Monsanto Agreement.

          Whenever the stock transfer books of the Company are closed for any
proper purpose, the Voting Trustees shall close the transfer books for Trust
Certificates for such period, and whenever a record date is properly fixed as a
record date in lieu of closing the stock transfer books of the Company, the
Voting Trustees shall use the same record date for any rights consequent
thereon.

          4.   Voting Deposited Stock.  During the period that any shares of
               ----------------------

Common Stock are deposited hereunder, the Voting Trustees shall have, with
respect to all such shares of Common Stock, the full and unqualified right and
power to vote in person or by proxy for, or (to the extent, if any, permitted by
the articles of incorporation of the Company) to consent in writing
<PAGE>
to, the election of directors of the Company and upon all other matters which
shall be submitted to a vote or for the written consent of shareholders of the
Company, to the same extent that in the absence of this Agreement, the holders
of such shares of Common Stock deposited hereunder would be entitled to possess,
enjoy and exercise, including the right and power to waive notice of the holding
of any meeting of holders of the Common Stock of the Company.  Except as
otherwise provided in Section 5 below, the Voting Trustees shall vote all shares




of Common Stock deposited hereunder as a unit in accordance with the
determination of a majority of the Voting Trustees, or if only two Voting
Trustees are acting hereunder, as a unit as the Voting Trustees shall agree.

          5.   Discretion of Voting Trustees.  The Voting Trustees agree to
               -----------------------------

exercise their best judgment from time to time
in voting the Common Stock deposited hereunder and in consenting to or acting
upon corporate acts of the Company; provided, however, that with respect to
voting of such shares in connection with a matter contemplated by Section 2.3,
2.4 or 2.5 of the Monsanto Agreement or in connection with a Business
Combination (as such term is defined in the Monsanto Agreement), the Voting
Trustees shall vote such number of shares as are reflected on the Trust
Certificate(s) of each Registered Holder in accordance with the instructions of
such Registered Holder or, if no such instructions are given, in accordance with
the recommendation of the Board of Directors of the Company.  The Voting
Trustees, as such or in their individual capacities, shall assume no
responsibility in respect of any action taken by them or any action taken in
furtherance of any vote or consent which they may
<PAGE>
give or by reason of any action taken by the management of the Company, and the
Voting Trustees shall not incur any responsibility or liability as Voting
Trustees or otherwise by reason of any error of law, fact or judgment or by
reason of any matter or thing done or omitted to be done under this Agreement,
except in each case for their own individual malfeasance.




          6.   Successor Voting Trustee.  Any of the Voting Trustees may resign
               ------------------------

at any time by an instrument in writing
delivered to the other Voting Trustees.  In the event any Voting Trustee who is
a Depositor serves Withdrawal Notices pursuant to the Shareholder Agreement
which cumulatively involve more than one-half of such Voting Trustee's Subject
Shares, the other Voting Trustees shall have the power to remove such person as
a Voting Trustee by written instrument delivered to such person.  The Voting
Trustees may by written instrument signed by all Voting Trustees who are then
acting designate a successor Voting Trustee or a succession of successor Voting
Trustees, or establish a procedure for selecting a successor Voting Trustee or a
succession of successor Voting Trustees, provided that any such instrument shall
not be effective until it has been filed in the registered office of the Company
in the State of Delaware.  If at any time no Voting Trustee is acting or
qualified to act and no written instrument has been adopted pursuant to the
preceding sentence, the successor Voting Trustee shall be such person, persons,
or succession of persons, as shall be designated in an
<PAGE>
instrument in writing signed by CHARLES C. ROBERTS and delivered to the Voting
Trustees at a time when CHARLES C. ROBERTS is acting as a Voting Trustee.

          7.   Dividends; Rights to Subscribe, Etc.  An amount equal to any and
               ------------------------------------

all dividends or distributions in cash or
property which may be received by the Voting Trustees during the term of this
Agreement upon Common Stock deposited hereunder shall be paid by them (as and
when received or as soon thereafter as may be practical) ratably (based on the




number of shares of Common Stock reflected on the Trust Certificate(s) of each
Registered Holder) to the Registered Holders as shown by the books of the Voting
Trustees on the record date for such dividend or distribution; provided,
however, that the Voting Trustees may, in their discretion from time to time,
instead of receiving and distributing such dividends or distributions, authorize
the Company to make payment or delivery thereof directly to the Registered
Holders.

          If any dividend shall be paid or distribution made in shares of stock
of the Company having voting rights, such shares shall be deposited hereunder
and held by the Voting Trustees in the same manner and upon the same terms and
conditions as the shares of Common Stock deposited with the Voting Trustees
pursuant to Section 1 of this Agreement upon which such dividend was paid or
such distribution was made.  Thereupon, appropriate Trust Certificates shall be
issued to the Registered Holders entitled to such dividend or distribution as
shown by the books of the Voting Trustees.
<PAGE>
          If rights to subscribe to purchase or acquire any shares of stock or
other assets of the Company should inure to the Voting Trustees in respect of
shares of Common Stock deposited with the Voting Trustees, the Voting Trustees,
upon the request of the Registered Holder of the Trust Certificates issued with
respect to such shares accompanied by the funds required for such purpose, shall
exercise such rights to subscribe for, purchase or acquire such shares of stock
or other assets with respect to such deposited shares of Common Stock.  Any
additional shares of stock of the Company having voting rights so acquired by
the Voting Trustees shall thereupon be deemed to have been deposited by such




Registered Holder with the Voting Trustees, subject to all the terms and
conditions of this Agreement, and an appropriate Trust Certificate shall be
issued to such Registered Holder.  Any other shares of stock or assets received
by the Voting Trustees shall be promptly delivered to such Registered Holder.

          The Voting Trustees shall have no power to sell, exchange, pledge or
otherwise dispose of any of the Common Stock or other voting shares of stock of
the Company held by the Voting Trustees for other securities, cash or other
property; provided, however, that the Voting Trustees shall tender or exchange
shares of Common Stock in accordance with the terms of any tender or
exchange offer, if (i) the Voting Trustees are so instructed in writing by a
Registered Holder with respect to a number of shares of Common Stock not in
excess of the number of shares reflected on the Trust Certificate(s) issued to
such Registered Holder and
<PAGE>
(ii) such tender or exchange offer would result, if consummated in accordance
with its terms, in the beneficial ownership by any person or group (within the
meaning of Rule 13d-3 under the Securities Exchange Act of 1934, as amended (the
"Exchange Act")) of all of the Common Stock and Class B Common Stock of the
Company; provided, however, that the Voting Trustees shall not surrender any
Common Stock in connection with such tender or exchange offer unless the Company
has previously published to security holders of the Company a statement pursuant
to Rule 14e-2 (or any successor rule) under the Exchange Act.  In the event that
the tendered shares are accepted by the offeror or the exchange is consummated,
then the consideration therefor shall be distributed to such Registered Holder
upon such Registered Holder's surrender for cancellation of Trust Certificates




representing at least the number of shares of Common Stock so accepted or
exchanged.  If such Registered Holder surrenders Trust Certificates representing
more than the number of shares of Common Stock so accepted or exchanged, the
Voting Trustees shall issue to such Registered Holder a new Trust Certificate
representing such Registered Holder's remaining Subject Shares.

          The Voting Trustees shall send or cause to be sent to all Registered
Holders, copies of all requests, notices, proxy statements and other documents
sent by the Company to its stockholders, promptly upon their becoming available.
<PAGE>
          8.   Term.  This Agreement shall terminate with respect to any share
               ----

of Common Stock at any time deposited hereunder on the earliest to occur of (a)
the date on which such share of Common Stock is withdrawn by a Depositor in
accordance with the provisions of the Shareholder Agreement, (b) the date on
which all Voting Trustees agree in writing to such termination, or (c) the date
when the voting of such share ceases to be vested in the Voting Trustee.

          9.   Termination Procedure.  Upon any termination of this Agreement
               ---------------------

with respect to any share of Common Stock deposited hereunder and the surrender
for cancellation of the Trust Certificate representing such share, the Voting
Trustees shall cause such share to be registered in the name of the Registered
Holder of such Trust Certificate or, if such Trust Certificate (a) is duly
endorsed by, or accompanied by instruments of transfer in form reasonably
satisfactory to the Voting Trustees executed by, the Registered Holder or his or
her




attorney duly authorized in writing, with signatures guaranteed by a bank or
member firm of the New York Stock Exchange, and (b) is accompanied by any
required transfer tax stamps or funds therefor, in the name or names of his or
her nominee or nominees.  The Trust Certificates so surrendered shall thereupon
be canceled by the Voting Trustees.

          10.  Acceptance of Trust; Compensation.  The Voting Trustees hereby
               ---------------------------------

accept the trust hereby created subject to all of
<PAGE>
the terms, conditions and requirements herein contained and each of them agrees
to exercise the powers and perform the duties of Voting Trustee as herein set
forth.  Any Voting Trustee who is an initial Voting Trustee or a spouse or a
descendant of an initial Voting Trustee shall not receive or accept any
compensation for services as Voting Trustee hereunder, but any other Voting
Trustee shall be entitled to reasonable compensation for services as Voting
Trustee hereunder; provided, however, that nothing herein contained shall
prevent any Voting Trustee from receiving compensation as a director, officer,
employee or agent of the Company.



          11.  Miscellany.  (a)  It is the intent and understanding of each
               ----------

party hereto that if any term or provision of this Agreement is held by a court
of competent jurisdiction or other authority to be invalid, void, unenforceable
or against its regulatory policy, then such term or provision shall be deemed




modified to the extent necessary to make it enforceable by such court or other
authority.

          (b)  Each Depositor shall pay his or her own expenses incurred in
connection with this Agreement.

          (c)  This Agreement shall be binding upon and shall inure to the
benefit of and be enforceable by the successors and assigns of the parties
hereto.
<PAGE>
          (d)  Except as provided in Section 6, this Agreement may be amended
only by written agreement signed by all Registered Holders of Trust Certificates
and filed in the registered office of the Company in the State of Delaware.

          (e)  All notices or other communications required or permitted
hereunder shall be in writing and shall be deemed given when delivered
personally or when sent by registered or certified
mail (postage prepaid, return receipt requested) addressed as follows:
          If to the Voting Trustees:

               Douglas C. Roberts
               Virginia R. Holt
               John T. Roberts
               Charles C. Roberts
               Mary R. Roberts
               P.O. Box 826




               DeKalb, Illinois  60115



          If to the Depositors:

               Douglas C. Roberts
               DeKalb Genetics Corporation
               3100 Sycamore Road
               DeKalb, Illinois  60115

               Lynne King Roberts
               1449 Janet Street
               Sycamore, Illinois  60178

               Terrance K. Holt
               2329 Clover Lane
               Northfield, Illinois  60093

               Virginia R. Holt
               2329 Clover Lane
               Northfield, Illinois  60093
<PAGE>
               John T. Roberts
               2090 Mulsanne Drive
               Zionsville, Indiana  46077





               Robin R. Roberts
               2090 Mulsanne Drive
               Zionsville, Indiana  46077

               Charles C. and Mary R. Roberts
               P.O. Box 826
               DeKalb, Illinois 60115


          If to any Registered Holder other than a Depositor, to such
          Registered Holder's address set forth in the book or books
          of the Voting Trustees kept pursuant to Section 3 hereof.


or to such other address as any party may have furnished to the other parties in
writing in accordance herewith.



<PAGE>
          (f)  This Agreement relates to the internal affairs and securities of
a Delaware corporation and shall be governed by and construed in accordance with
the laws of the State of Delaware.




          (g)  Descriptive headings are for convenience only and shall not
control or affect the meaning or construction of any provision of this
Agreement.

          (h)  This Agreement may be executed in one or more counterparts, all
of which shall be considered one and the same agreement, and shall become a
binding agreement when one or more counterparts have been signed by each party
hereto and delivered to each other party or such party's representative.

          (i)  A copy of this Agreement shall be filed in the registered office
of the Company in the State of Delaware no later than February 2, 1996 and shall
be open to the inspection of any shareholder of the Company or any Registered
Holder under this Agreement daily during business hours.



<PAGE>
          IN WITNESS WHEREOF, the parties hereto have caused this Agreement to
be duly executed as of the day and year first above written.
                              VOTING TRUSTEES:

                                     Douglas C. Roberts




                                      Virginia R. Holt



                                       John T. Roberts



                                     Charles C. Roberts



                                       Mary R. Roberts

                              DEPOSITORS:

                              Douglas C. Roberts, individually


                              The Douglas C. Roberts Trust dated January 28,
                              1972






                              By:
                                 --------------------------------
                                   Douglas C. Roberts, Trustee

                              The David Kim Roberts 1989 Trust

<PAGE>
                              By:
                                 --------------------------------
                                   Douglas C. Roberts, Trustee

                              The Steven Suh Roberts 1989 Trust


                              By:
                                 --------------------------------
                                   Douglas C. Roberts, Trustee


                              The Jeffrey King Roberts 1989 Trust


                              By:
                                 --------------------------------
                                   Douglas C. Roberts, Trustee






                              Virginia R. Holt, individually


                              The Virginia R. Holt Trust dated August 22, 1973


                              By:
                                 --------------------------------
                                   Virginia R. Holt, Trustee


                              The Amanda Mary Holt 1989 Trust


                              By:
                                 --------------------------------
                                   Virginia R. Holt, Trustee


                              The Laura Elizabeth Holt 1989 Trust


                              By:
                                 --------------------------------
                                   Virginia R. Holt, Trustee


<PAGE>





                              John T. Roberts, individually


                              The John T. Roberts Trust dated April 9, 1976


                              By:
                                 --------------------------------
                                   John T. Roberts, Trustee



<PAGE>
                              The Allison Elizabeth Roberts 1989 Trust


                              By:
                                 --------------------------------
                                   John T. Roberts, Trustee


                              The Katherine Elsie Roberts 1990 Trust Number 1


                              By:
                                 --------------------------------
                                   John T. Roberts, Trustee





                              The Charles C. and Mary R. Roberts Living Trust
                              dated October 15, 1991


                              By:
                                 --------------------------------
                                   Charles C. Roberts, Trustee


                              By:
                                 --------------------------------
                                   Mary R. Roberts, Trustee


                              The Trust F/B/O Douglas C. Roberts under Eleanor
                              T. Roberts Charitable Trust Agreement dated
                              December 21, 1967


                              By:
                                 --------------------------------
                                   Charles C. Roberts, Trustee


                              By:
                                 --------------------------------
                                   Mary R. Roberts, Trustee




                              The Trust F/B/O Virginia R. Holt under Eleanor T.
                              Roberts Charitable Trust Agreement dated December
                              21, 1967



                              By:
                                 --------------------------------
                                   Charles C. Roberts, Trustee

<PAGE>
                              By:
                                 --------------------------------
                                   Mary R. Roberts, Trustee


                              The Trust F/B/O John T. Roberts under Eleanor T.
                              Roberts Charitable Trust Agreement dated December
                              21, 1967


                              By:
                                 --------------------------------
                                   Charles C. Roberts, Trustee


                              By:
                                 --------------------------------
                                   Mary R. Roberts, Trustee





                              The David Kim Roberts Trust dated October 14, 1987


                              By:
                                 --------------------------------
                                   Lynne King Roberts, Trustee


                              The Amanda Mary Holt Trust dated December 6, 1985


                              By:
                                 --------------------------------
                                   Terrance K. Holt, Trustee


                              The Allison Elizabeth Roberts Trust dated August
                              6, 1986


                              By:
                                 --------------------------------
                                   Robin R. Roberts, Trustee


                              The Katherine Elsie Roberts Trust dated March 13,
                              1990




                              By:
                                 --------------------------------
                                   Robin R. Roberts, Trustee

<PAGE>
                              The Charles David Roberts Trust dated February 28,
                              1994


                              By:
                                 --------------------------------
                                   Robin R. Roberts, Trustee




<PAGE>
                            EXHIBIT A




<TABLE>
<CAPTION>
              ROBERTS FAMILY VOTING TRUST AGREEMENT
            DEPOSITED SHARES OF CLASS A COMMON STOCK
                 OF DeKALB GENETICS CORPORATION



                                                      SHARES
DEPOSITOR                                             DEPOSITED


<S>                                               <C>
Douglas C. Roberts, as Trustee of the Douglas C.
Roberts Trust dated January 28, 1972                    116,769

Douglas C. Roberts, as Trustee of the David Kim
Roberts 1989 Trust                                        7,000

Douglas C. Roberts, as Trustee of the Steven Suh
Roberts 1989 Trust                                        7,000

Douglas C. Roberts, as Trustee of the Jeffrey
King Roberts 1989 Trust                                   7,000

Virginia R. Holt, as Trustee of the Virginia R.
Holt Trust dated August 22, 1973                        123,672

Virginia R. Holt, as Trustee of the Amanda Mary




                                                      SHARES
DEPOSITOR                                             DEPOSITED


Holt 1989 Trust                                           7,000

Virginia R. Holt, as Trustee of the Laura
Elizabeth Holt 1989 Trust                                 7,000

John T. Roberts, as Trustee of the John T.
Roberts Trust dated April 9, 1976                       122,414

John T. Roberts, as Trustee of the Allison
Elizabeth Roberts 1989 Trust                              7,000

John T. Roberts, as Trustee of the Katherine
Elsie Roberts 1990 Trust #1                               7,000

Charles C. Roberts and Mary R. Roberts, as
Trustees of the Charles C. and Mary R. Roberts
Living Trust dated October 15, 1991                      10,113

Charles C. Roberts and Mary R. Roberts, as
Trustees of the Trust F/B/O Douglas C. Roberts
under Eleanor T. Roberts Charitable Trust
Agreement dated December 21, 1967                         5,667

Charles C. Roberts and Mary R. Roberts, as
Trustees of the Trust F/B/O Virginia R. Holt




                                                      SHARES
DEPOSITOR                                             DEPOSITED


under Eleanor T. Roberts Charitable Trust
Agreement dated December 21, 1967                         3,784




<S>                                               <C>
Charles C. Roberts and Mary R. Roberts, as
Trustees of the Trust F/B/O John T. Roberts under
Eleanor T. Roberts Charitable Trust Agreement
dated December 21, 1967                                   3,941

Lynne King Roberts, as Trustee of the David Kim
Roberts Trust dated October 14, 1987                      1,618

Terrance K. Holt, as Trustee of the Amanda Mary
Holt Trust dated December 6, 1985                         3,598

Robin R. Roberts, as Trustee of the Allison
Elizabeth Roberts Trust dated August 6, 1986              3,739

Robin R. Roberts, as Trustee of the Katherine
Elsie Roberts Trust dated March 13, 1990                    480




Robin R. Roberts, as Trustee of the Charles David
Roberts Trust dated February 28, 1994                       480

</TABLE>







<PAGE>
                                                        EXHIBIT B
No.                                            Shares
    -----------                                       -----------
                   DEKALB GENETICS CORPORATION
                    (A DELAWARE CORPORATION)

                    VOTING TRUST CERTIFICATE

          THIS IS TO CERTIFY that                            has deposited
                                  --------------------------
           shares of Class A Common Stock (the "Common Stock") of DeKalb
- ----------
Genetics Corporation, a Delaware corporation (the "Company"), with the Voting
Trustees under the Voting Trust Agreement dated as of January 31, 1996, (the
"Agreement") by and among (1) Douglas C. Roberts, Virginia R. Holt John T.
Roberts, Charles C. Roberts and Mary R. Roberts, as Voting Trustees; and (2)
Douglas C. Roberts, individually and as Trustee of (i) the Douglas C. Roberts
Trust dated January 28, 1972, (ii) the David Kim Roberts 1989 Trust, (iii) the
Steven Suh Roberts 1989 Trust, and (iv) the Jeffrey King Roberts 1989 Trust;
Virginia R. Holt, individually and as Trustee of (i) the Virginia R. Holt Trust
dated August 22, 1973, (ii) the Amanda Mary Holt 1989 Trust, and (iii) the Laura




Elizabeth Holt 1989 Trust; John T. Roberts, individually and as Trustee of (i)
the John T. Roberts Trust dated April 9, 1976, (ii) the Allison Elizabeth
Roberts 1989 Trust, and (iii) the Katherine Elsie Roberts 1990 Trust Number 1;
Charles C. Roberts and Mary R. Roberts, as Trustees of (i) the
<PAGE>
Charles C. and Mary R. Roberts Living Trust dated October 15, 1991, (ii) the
Trust F/B/O Douglas C. Roberts under Eleanor T. Roberts Charitable Trust
Agreement dated December 21, 1967, (iii) the Trust F/B/O Virginia R. Holt under
Eleanor T. Roberts Charitable Trust Agreement dated December 21, 1967, and (iv)
the Trust F/B/O John T. Roberts under Eleanor T. Roberts Charitable Trust
Agreement dated December 21, 1967; Lynne King Roberts, as Trustee of the David
Kim Roberts Trust dated October 14, 1987; Terrance K. Holt, as Trustee of the
Amanda Mary Holt Trust dated December 6, 1985; and Robin R. Roberts, as Trustee
of (i) the Allison Elizabeth Roberts Trust dated August 6, 1986, (ii) the
Katherine Elsie Roberts Trust dated March 13, 1990, and (iii) the Charles David
Roberts Trust dated February 28, 1994, to which Agreement the holder hereof
assents and becomes a party by the acceptance of this certificate as fully as
though (except as limited by such Agreement) he or she had duly executed and
delivered such Agreement, and to which Agreement reference is hereby made for a
statement of the terms, covenants, conditions and provisions thereof with like
force and effect as if set out in full herein.  A copy of such Agreement has
been filed with the Voting Trustees and at the registered office of the Company
in the State of Delaware, and such copies are open to inspection by the holder
hereof.
<PAGE>




          No sale, transfer, pledge or other disposition of the shares
represented by this certificate may be made except in accordance with the
Agreement, the Shareholder Agreement dated as of January 31, 1996 among the
Depositors under the Agreement and the Stockholders' Agreement dated as of
January 31, 1996 among the parties to the Agreement and Monsanto Company, copies
of which are on file in the office of the Secretary of the Company and the
Voting Trustees.  This certificate is not valid unless countersigned by the
Voting Trustees.


DATED:
        --------------------

                                             As Voting Trustee


                                             As Voting Trustee


                                             As Voting Trustee


                                             As Voting Trustee






                                             As Voting Trustee


<PAGE>
                      (Form of Assignment)

          For value received,                      hereby sells, assigns and
                              --------------------
transfers the within certificate and all rights and interest represented
thereby, to                         and does hereby irrevocably constitute and
            -----------------------
appoint                         attorney, to transfer this certificate on the
        -----------------------
books of the Voting Trustees with full power of substitution in the premises.

DATED:
       ----------------

Signature guaranteed:
By:
    ---------------------






<PAGE>
                         ROBERTS FAMILY
                         --------------

                      SHAREHOLDER AGREEMENT
                      ---------------------


          THIS SHAREHOLDER AGREEMENT (the "Agreement"), made and entered into as
of the 31st day of January, 1996, among Douglas C. Roberts, individually and as
Trustee of (i) the Douglas C. Roberts Trust dated January 28, 1972, (ii) the
David Kim Roberts 1989 Trust, (iii) the Steven Suh Roberts 1989 Trust, and (iv)
the Jeffrey King Roberts 1989 Trust; Virginia R. Holt, individually and as
Trustee of (i) the Virginia R. Holt Trust dated August 22, 1973, (ii) the Amanda
Mary Holt 1989 Trust, and (iii) the Laura Elizabeth Holt 1989 Trust; John T.
Roberts, individually and as Trustee of (i) the John T. Roberts Trust dated
April 9, 1976, (ii) the Allison Elizabeth Roberts 1989 Trust, and (iii) the
Katherine Elsie Roberts 1990 Trust Number 1; Charles C. Roberts and Mary R.
Roberts, as Trustees of (i) the Charles C. and Mary R. Roberts Living Trust
dated October 15, 1991, (ii) the Trust F/B/O Douglas C. Roberts under Eleanor T.
Roberts Charitable Trust Agreement dated December 21, 1967, (iii) the Trust
F/B/O Virginia R. Holt under Eleanor T. Roberts Charitable Trust Agreement dated
December 21, 1967, and (iv) the Trust F/B/O John T. Roberts under Eleanor T.
Roberts Charitable Trust Agreement
dated December 21, 1967; Lynne King Roberts, as Trustee of the David Kim Roberts
Trust dated October 14, 1987; Terrance K. Holt, as Trustee of the Amanda Mary
Holt Trust dated December 6, 1985; and Robin R. Roberts, as Trustee of (i) the




Allison Elizabeth Roberts Trust dated August 6, 1986, (ii) the Katherine Elsie
Roberts Trust dated March 13, 1990, and (iii) the Charles David Roberts Trust
dated February 28, 1994 (hereinafter referred to collectively as the
"Shareholders" and individually as a "Shareholder").
<PAGE>
                      W I T N E S S E T H:

          WHEREAS, each of the Shareholders is an owner of Class A Common Stock
(the "Common Stock") of DeKalb Genetics Corporation, a Delaware corporation (the
"Company"), which he or she has deposited with Douglas C. Roberts, Virginia R.
Holt, John T. Roberts, Charles C. Roberts and Mary R. Roberts, as Trustees of
the Roberts Family Voting Trust ("Voting Trustees") pursuant to an agreement
dated as of January 31, 1996 (the "Voting Trust Agreement"); and

          WHEREAS, each of the Shareholders deems it to be in the mutual best
interests of the Shareholders to grant to the other
Shareholders a right of purchase with respect to any proposed withdrawal of such
Shareholder's respective shares of Common Stock now or hereafter deposited with
the Voting Trustees (the "Subject Shares") during the ten year period beginning
January 31, 1996;

          NOW, THEREFORE, in consideration of the foregoing and the agreements
hereinafter set forth, the parties hereto agree as follows:




          1.   Transfer Restrictions.  No Shareholder (nor any successor
               ---------------------

thereto) shall sell, withdraw from the Voting Trust
<PAGE>
Agreement or otherwise dispose of any interest in his or her Subject Shares
except in accordance with the terms and conditions of this Agreement.

          2.   Right of Purchase.  (a) Each Shareholder agrees that from the
               -----------------

date hereof to the Termination Date, the Shareholder will not, directly or
indirectly, voluntarily or involuntarily, sell, convey, transfer, assign or
otherwise dispose of ("transfer") any interest in Stock (the term "Stock" as
used herein is defined in the Stockholders' Agreement, dated
as of January 31, 1996, among the parties hereto, the Voting Trustees, and
Monsanto Company (the "Monsanto Agreement")) unless such Shareholder has
withdrawn such Shareholder's Subject Shares from the Voting Trust Agreement
after compliance with the procedures described below; provided, however, that
the foregoing restriction on transfer shall not apply to any of the following:
(i) a Pledge (as such term is defined in the Monsanto Agreement) of Stock or any
interest therein to a bank or other reputable lending institution in a bona fide
                                                                       ---- ----

loan transaction and not made to avoid the provisions of this Paragraph 2(a)
through Paragraph 2(d); (ii) a transfer of any interest in Stock, directly or
indirectly, voluntarily or involuntarily, to a Permitted Transferee (as such
term is defined in the Monsanto Agreement); (iii) the appointment of or transfer
of any interest in Stock to any trustee, executor, administrator, guardian,
Voting Trustee of the Voting Trust Agreement or other fiduciary acting solely




for the benefit of one or more Permitted Transferees; (iv) the granting of a
proxy solicited by the Board of Directors (as such term is defined in the
Monsanto Agreement); (v) any exchange,
<PAGE>
conversion or transfer of Stock in connection with a Business Combination (as
such term is defined in the Monsanto Agreement); provided, however, that this
clause (v) shall not permit any
agreement to sell or otherwise transfer any interest in Stock (including the
granting of any proxy to the acquiror) by any Shareholder prior to the Company's
execution of an agreement with respect to such Business Combination; or (vi) any
tender or exchange of Stock in accordance with the terms of any tender or
exchange offer, which tender or exchange offer would result, if consummated in
accordance with its terms, in the beneficial ownership by any person or group
(within the meaning of Rule 13d-3 under the Securities Exchange Act of 1934, as
amended (the "Exchange Act")) of all of the Common Stock and Class B Common
Stock of the Company; provided, however, that this clause (vi) shall not permit
any Shareholder to surrender (or enter into any binding agreement to sell or
surrender) any Stock or interest therein in connection with such tender or
exchange offer unless the Company has previously published to security holders
of the Company a statement pursuant to Rule 14e-2 (or any successor rule) under
the Exchange Act. Each Shareholder's right to withdraw Subject Shares shall be
exercisable only once during each calendar year.  To exercise the right of
withdrawal with respect to any or all of the withdrawing Shareholder's Subject
Shares, such Shareholder (the "Withdrawing Shareholder") shall transmit a
written notice (the "Withdrawal Notice") to the other Shareholders setting forth
the number of Subject Shares proposed to be withdrawn.




<PAGE>
          (b)  Upon receipt of a Withdrawal Notice pursuant to Paragraph 2(a),
the other Shareholders (the "Non-Withdrawing Shareholders") shall have an option
to purchase all or any part of the Subject Shares covered by such Withdrawal
Notice ("Offered Shares") on the following terms and conditions:

          (i)  Any Offered Shares acquired pursuant to this Paragraph 2(b)
     shall be purchased at the following price:

               (A) If there is a Market Price (as hereinafter defined) for
     the Class B Common Stock of the Company, the exercise price per
     Subject Share shall be equal to the Market Price of the Class B Common
     Stock as of the date when the Withdrawal Notice is transmitted to the
     Non-Withdrawing Shareholders, provided that if each share of Class A
     Common Stock of the Company is no longer exchangeable for one share of
     Class B Common Stock of the Company, the Market Price shall be
     adjusted accordingly.

               (B) If there is no Market Price for the Class B Common Stock
     of the Company, the exercise price per
     Subject Share shall be equal to the Appraisal Value of each Subject
     Share on the date when the Withdrawal Notice is transmitted to the
     Non-Withdrawing Shareholders.
<PAGE>
          (ii) Each Non-Withdrawing Shareholder shall have the option (the
     "First Option") to elect to acquire all or any portion of his or her




     proportionate part (as hereinafter defined) of the Offered Shares.  A
     written notice of intent to exercise the First Option shall be
     delivered to the Withdrawing Shareholder on or before the later of (i)
     the day that is sixty (60) days after the date on which the
     Withdrawing Shareholder shall have given the Withdrawal Notice or (ii)
     the day that is thirty (30) days after the date that the Appraisal
     Value (as hereinafter defined) is determined.  A Non-Withdrawing
     Shareholder's proportionate part pursuant to the First Option shall be
     that number of shares which bears the same proportion to the total
     number of Offered Shares as the number of Subject Shares represented
     by Trust Certificates issued under the Voting Trust Agreement ("Trust
     Certificates") and outstanding in the name of such Non-Withdrawing
     Shareholder at the time the Withdrawal Notice is given bears to the
     total number of Subject Shares represented by Trust Certificates then
     issued and outstanding in the names of all Non-Withdrawing
     Shareholders.

          (iii)  In the event that Non-Withdrawing Shareholders have not
     elected to acquire all of the Offered Shares pursuant to the First
     Option, the Withdrawing Shareholder shall transmit a written notice to
     each Non-Withdrawing Shareholder who elected to acquire Offered Shares
     pursuant to the First Option (a
<PAGE>
     "Purchasing Shareholder") on or before the day that is fifteen (15)
     days after the date on which notice of intent to exercise the First
     Option was due that the Purchasing Shareholder has an option (the




     "Second Option") to acquire part of any Offered Shares not acquired
     pursuant to the First Option (the "Available Shares").  A written
     notice of intent to exercise the Second Option shall be delivered to
     the Withdrawing Shareholder on or before the day that is forty-five
     (45) days after the date on which notice of intent to exercise the
     First Option was due.  Each Purchasing Shareholder who exercises the
     Second Option shall be
     required to purchase that number of Available Shares which bears the
     same proportion to the total number of Available Shares as the number
     of Subject Shares represented by Trust Certificates issued and
     outstanding in the name of such Purchasing Shareholder at the time the
     Withdrawal Notice is given bears to the total number of Subject Shares
     represented by Trust Certificates then issued and outstanding in the
     names of all Purchasing Shareholders who exercise the Second Option.

          (iv)  Any shares purchased by a Non-Withdrawing Shareholder
     pursuant to the terms and conditions of Paragraph 2(b) shall remain
     subject to this Agreement.
<PAGE>
          (c)  If, following receipt of a Withdrawal Notice pursuant to
Paragraph 2(a), the Non-Withdrawing Shareholders elect, pursuant to the options
granted to them in the preceding Paragraph 2(b), to purchase less than all
Offered Shares, the Voting Trustees shall deliver the Offered Shares for which
no election was made to the Company with written instructions in accordance with
Section 9 of the Voting Trust Agreement directing the Company to transfer such
shares to the Withdrawing




Shareholder.  The unacquired Offered Shares so transferred to the Withdrawing
Shareholder shall no longer be subject to this Agreement.

          (d)  As a condition to giving effect to any transfer contemplated by
clauses (i) through (iii) of Paragraph 2(a) hereof, the transferee shall be
required to deliver to the Voting Trustees a written agreement to be bound by
the restrictions contained herein and in the Voting Trust Agreement in form
reasonably satisfactory to the Voting Trustees and thereafter such transferee
shall be deemed to be a Shareholder hereunder.

          3.   Option Exercise; Closing.  At the time a Non- Withdrawing
               ------------------------

Shareholder delivers written notice of his or her election to purchase Offered
Shares (a "Purchase Notice") pursuant to Paragraph 2(b) hereof, there shall be
deemed to be a binding agreement between such Withdrawing Shareholder
(hereinafter referred to as "Seller") and such Non-Withdrawing Shareholder (each
such Non-Withdrawing Shareholder is hereinafter referred to as "Purchaser", and
all such non-Withdrawing Shareholders are hereinafter referred to collectively
as "Purchasers").  On the 120th day after the date on which the

<PAGE>
Seller shall have given the Withdrawal Notice (or such other time as the parties
to such agreement shall agree), Seller shall deliver to each Purchaser the Trust
Certificates for the Subject Shares to be purchased by Purchaser pursuant to
such Purchase Notice, duly endorsed by, or accompanied by instruments of
transfer in form reasonably satisfactory to Purchaser duly executed by Seller,




or Seller's attorney duly authorized in writing, with signatures guaranteed by a
bank or member firm of the New York Stock Exchange, and Purchaser will deliver
to Seller the purchase price (to be paid by wire transfer to an account
designated by Seller or by certified or bank cashier's check or other form of
payment satisfactory to Seller).

          4.   Definitions.  (a) As used herein, the term "Appraisal Value" of
               -----------

Subject Shares shall mean the fair market value of such Subject Shares as of a
given date as determined by an appraiser mutually acceptable to the Seller and
the Purchasers.  If a determination of the Appraisal Value of Subject Shares is
required hereunder, it shall be incumbent upon Purchasers to request the
appointment of an appraiser within forty (40) days after Seller shall have given
the Withdrawal Notice.  In the event that the Purchasers and Seller are unable
to agree on an appraiser, each of them shall appoint an appraiser and such
appraisers shall select a third appraiser who alone shall determine such
Appraisal Value.  The costs and expenses of any such appraisal shall be borne
equally by the Purchasers on the one hand and Seller on the other.
<PAGE>
          (b)  As used herein, the term "Market Price" of the Class B Common
Stock of the Company shall mean the average of the daily closing prices on the
NASDAQ National Market System (or such principal exchange on which the Company's
Class B Common Stock is then listed) for the Company's Class B Common Stock for
the thirty (30) consecutive trading days commencing on the 14th trading day
prior to the date with respect to which the Market Value is being determined and
extending through the 15th trading day after such date.  The closing price for




each day shall be the closing price, if reported, or if the closing price is not
reported, the average of the closing bid and asked prices as reported by NASDAQ
or a similar source selected from time to time by the Company for such purpose.

          5.   Legends and Stop Transfer Orders.  (a) Each of the Shareholders
               --------------------------------

agrees as follows:


          (i)  to the placement of the following legend on the face of any
     and all certificates for Subject Shares subject to this Agreement at
     any time prior to the Termination Date:

               "No sale, transfer, pledge or other disposition of the
          shares represented by this certificate may be made except in
          accordance with the Roberts Family Shareholder Agreement
<PAGE>
          dated as of January 31, 1996, among Douglas C. Roberts,
          individually and as Trustee of (i) the Douglas C. Roberts
          Trust dated January 28, 1972, (ii) the David Kim Roberts
          1989 Trust, (iii) the Steven Suh Roberts 1989 Trust, and
          (iv) the Jeffrey King Roberts 1989 Trust; Virginia R. Holt,
          individually and as Trustee of (i) the Virginia R. Holt
          Trust dated August 22, 1973, (ii) the Amanda Mary Holt 1989
          Trust, and (iii) the Laura Elizabeth Holt 1989 Trust; John
          T. Roberts, individually and as Trustee of (i) the John T.




          Roberts Trust dated April 9, 1976, (ii) the Allison
          Elizabeth Roberts 1989 Trust, and
          (iii) the Katherine Elsie Roberts 1990 Trust Number 1;
          Charles C. Roberts and Mary R. Roberts, as Trustees of (i)
          the Charles C. and Mary R. Roberts Living Trust dated
          October 15, 1991, (ii) the Trust F/B/O Douglas C. Roberts
          under Eleanor T. Roberts Charitable Trust Agreement dated
          December 21, 1967, (iii) the Trust F/B/O Virginia R. Holt
          under Eleanor T. Roberts Charitable Trust Agreement dated
          December 21, 1967, and (iv) the Trust F/B/O John T. Roberts
          under Eleanor T. Roberts Charitable Trust Agreement dated
          December 21, 1967; Lynne King Roberts, as Trustee of the
          David Kim Roberts Trust dated October 14, 1987; Terrance K.
          Holt, as
<PAGE>
          Trustee of the Amanda Mary Holt Trust dated December 6,
          1985; and Robin R. Roberts, as Trustee of (i) the Allison
          Elizabeth Roberts Trust dated August 6, 1986, (ii) the
          Katherine Elsie Roberts Trust dated March 13, 1990, and
          (iii) the Charles David Roberts Trust dated February 28,
          1994, a copy of
          which is on file in the office of the Secretary of DeKalb
          Genetics Corporation."

          (ii) to the entry of stop transfer orders with any transfer agent
     of the Company's Common Stock and with the Voting Trustees under the




     Roberts Family Voting Trust Agreement dated as of January 31, 1996,
     among the Voting Trustees and Shareholders, against the transfer of
     certificates for Common Stock legended pursuant hereto otherwise than
     in compliance with the provisions of this Agreement.

          (b)  The Voting Trustees shall deliver certificates for Common Stock
containing such legend and instruments of transfer to the Company, with
directions to remove such legend and withdraw such stop transfer orders with
respect to such certificates for Common Stock under any of the following
circumstances:
<PAGE>
          (i)  when, following compliance with the provisions of this
     Agreement by a Withdrawing Shareholder, such shares are to be
     transferred to such Withdrawing Shareholder;

          (ii)  when directed in writing by all the Voting Trustees;

          (iii)  at any time after the Termination Date; and

          (iv)  when directed in writing by all the Shareholders.

          6.   Termination Date.  This Agreement (other than Paragraphs 5(b) and
               ----------------

7 hereof) shall terminate on January 31, 2006
(herein referred to as the "Termination Date").




          7.   Miscellany.  (a) The Shareholders acknowledge and agree that
               ----------

irreparable injury would occur in the event that any of the provisions of this
Agreement were not performed in accordance with their specific terms or were
otherwise breached.  It is accordingly agreed that the parties hereto shall be
entitled to an injunction or injunctions to prevent breaches of the provisions
of this Agreement and to enforce specifically the terms and provisions hereof in
addition to any other remedy to which they may be entitled at law or equity.

<PAGE>
          (b)  The Shareholders, acting for themselves and for their respective
successors and assigns, without regard to domicile, citizenship or residence,
hereby expressly and irrevocably consent to and subject themselves to the non-
exclusive jurisdiction of the courts of the United States District Court for the
Northern District of Illinois, or, if such District Court shall not have or
declines to accept jurisdiction, the courts of the State of Illinois located in
Cook County, Illinois, in respect of any matter arising under or in connection
with this Agreement; and service of process, notices and demands of the United
States District Court for the Northern District of Illinois and such courts of
the State of Illinois and any other notices or other communications required or
permitted under this Agreement, may be made upon any of them by personal service
at any place where they may be found or by mailing copies of such process,
notices, demands and communications by registered mail, postage-prepaid and
return receipt requested, to their respective addresses set forth in Paragraph
7(g) hereof.  No change in such addresses shall be effective insofar as service
of process, notices, demands and communications are concerned, unless such




addresses are located in the United States and receipt of notice of such change
shall have been acknowledged in writing by each other party hereto, which
acknowledgment shall not be
unreasonably withheld.  The foregoing provisions of this Paragraph 7(b) shall
not be construed to limit the right of any party to make such service of
process, notices, demands and communications in any manner permitted by
applicable law or to obtain jurisdiction over the other parties hereto in such
other jurisdiction, and in such other manner, as may be permitted by
<PAGE>
applicable law.  Each party further agrees that a final judgment or order in
respect of such matter may be enforced against such party in any other
jurisdiction by suit on such judgment or order or in such other manner as may be
permitted by applicable law.  Each party hereby irrevocably waives, to the
extent permitted by applicable law, any objection which it now has or hereafter
may have to the laying of venue in respect of any such matter brought or
maintained in the United States District Court for the Northern District of
Illinois or such courts of the State of Illinois.  Each party further waives, to
the extent permitted by applicable law, any claim which such party otherwise
might have that any such action, suit or proceeding brought or maintained in the
United States District of Illinois or such courts of the State of Illinois has
been brought in an inconvenient forum.

          (c)  It is the intent and understanding of each party hereto that if
any term or provision of this Agreement is held by
a court of competent jurisdiction or other authority to be invalid, void,
unenforceable or against its regulatory policy, then such term or provision




shall be deemed modified to the extent necessary to make it enforceable by such
court or other authority.

          (d)  Except as otherwise provided herein, each party hereto shall pay
its own expenses incurred in connection with this Agreement.
<PAGE>
          (e)  This Agreement shall inure to the benefit of and be enforceable
by, and shall be binding upon, any successor or transferee of a Shareholder.

          (f)  This Agreement may not be modified, amended, altered or
supplemented except by a written agreement signed by the Shareholders.

          (g)  All notices or other communications required or permitted
hereunder shall be in writing and shall be deemed given when delivered
personally or when sent by registered or certified mail (postage prepaid, return
receipt requested) addressed as follows:

          If to the Voting Trustees:

               Douglas C. Roberts
               Virginia R. Holt
               John T. Roberts
               Charles C. Roberts
               Mary R. Roberts
               P.O. Box 826
               DeKalb, Illinois  60115





          If to the Shareholders:

               Douglas C. Roberts
               DeKalb Genetics Corporation
               3100 Sycamore Road
               DeKalb, Illinois  60115

               Lynne King Roberts
               1449 Janet Street
               Sycamore, Illinois  60178

               Terrance K. Holt
               2329 Clover Lane
               Northfield, Illinois  60093
<PAGE>
               Virginia R. Holt
               2329 Clover Lane
               Northfield, Illinois  60093

               John T. Roberts
               2090 Mulsanne Drive
               Zionsville, Indiana 46077

               Robin R. Roberts
               2090 Mulsanne Drive




               Zionsville, Indiana 46077

               Charles C. and Mary R. Roberts
               P.O. Box 826
               DeKalb, Illinois 60115


or to such other address as any party may have furnished to the other parties in
writing in accordance herewith.

          (h)  No failure or delay on the part of any party in the exercise of
any power, right or privilege hereunder shall operate as a waiver thereof, nor
shall any single or partial exercise of any such power, right or privilege
preclude other or further exercise thereof or of any other right, power or
privilege.  All rights and remedies existing under this Agreement are cumulative
to, and not exclusive of, any rights or remedies otherwise available.

          (i)  This Agreement relates to the internal affairs and securities of
a Delaware corporation and shall be governed by and construed in accordance with
the laws of the State of Delaware.

          (j)  Descriptive headings are for convenience only and shall not
control or affect the meaning or construction of any provision of this
Agreement.
<PAGE>




          (k)  This Agreement may be executed in one or more counterparts, all
of which shall be considered one and the same agreement, and shall become a
binding agreement when one or more counterparts have been signed by each party
hereto and delivered to each other party or such party's representative.



<PAGE>
          IN WITNESS WHEREOF, the parties hereto have caused this Agreement to
be duly executed as of the day and year first above written.

                              Douglas C. Roberts, individually


                              The Douglas C. Roberts Trust dated January 28,
                              1972


                              By:
                                 --------------------------------
                                   Douglas C. Roberts, Trustee


                              The David Kim Roberts 1989 Trust




                              By:
                                 --------------------------------
                                   Douglas C. Roberts, Trustee


                              The Steven Suh Roberts 1989 Trust


                              By:
                                 --------------------------------
                                   Douglas C. Roberts, Trustee


                              The Jeffrey King Roberts 1989 Trust


                              By:
                                 --------------------------------
                                   Douglas C. Roberts, Trustee


                              Virginia R. Holt, individually


                              The Virginia R. Holt Trust dated August 22, 1973


                              By:
                                 -------------------------------




                                   Virginia R. Holt, Trustee




<PAGE>
                              The Amanda Mary Holt 1989 Trust


                              By:
                                 -------------------------------
                                   Virginia R. Holt, Trustee


                              The Laura Elizabeth Holt 1989 Trust


                              By:
                                 -------------------------------
                                   Virginia R. Holt, Trustee


                              John T. Roberts, individually


                              The John T. Roberts Trust dated April 9, 1976





                              By:
                                 -------------------------------
                                   John T. Roberts, Trustee


                              The Allison Elizabeth Roberts 1989 Trust


                              By:
                                 -------------------------------
                                   John T. Roberts, Trustee


                              The Katherine Elsie Roberts 1990 Trust Number 1


                              By:
                                 -------------------------------
                                   John T. Roberts, Trustee


                              The Charles C. and Mary R. Roberts Living Trust
                              dated October 15, 1991


                              By:
                                 -------------------------------
                                   Charles C. Roberts, Trustee
<PAGE>





                              By:
                                 -------------------------------
                                   Mary R. Roberts, Trustee

                              The Trust F/B/O Douglas C. Roberts under Eleanor
                              T. Roberts Charitable Trust Agreement dated
                              December 21, 1967


                              By:
                                 -------------------------------
                                   Charles C. Roberts, Trustee


                              By:
                                 -------------------------------
                                   Mary R. Roberts, Trustee


                              The Trust F/B/O Virginia R. Holt under Eleanor T.
                              Roberts Charitable Trust Agreement dated December
                              21, 1967


                              By:
                                 -------------------------------
                                   Charles C. Roberts, Trustee




                              By:
                                 -------------------------------
                                   Mary R. Roberts, Trustee


                              The Trust F/B/O John T. Roberts under Eleanor T.
                              Roberts Charitable Trust Agreement dated December
                              21, 1967


                              By:
                                 -------------------------------
                                   Charles C. Roberts, Trustee


                              By:
                                 -------------------------------
                                   Mary R. Roberts, Trustee


                              The David Kim Roberts Trust dated October 14, 1987


                              By:
                                 -------------------------------
                                   Lynne King Roberts, Trustee



 <PAGE>




                              The Amanda Mary Holt Trust dated December 6, 1985


                              By:
                                 -------------------------------
                                   Terrance K. Holt, Trustee


                              The Allison Elizabeth Roberts Trust dated August
                              6, 1986


                              By:
                                 -------------------------------
                                   Robin R. Roberts, Trustee


                              The Katherine Elsie Roberts Trust dated March 13,
                              1990


                              By:
                                 -------------------------------
                                   Robin R. Roberts, Trustee


                              The Charles David Roberts Trust dated February 28,
                              1994





          By:
             -------------------------------
                                   Robin R. Roberts, Trustee








<PAGE>



                     STOCKHOLDERS' AGREEMENT

                  DATED AS OF JANUARY 31, 1996




<PAGE>
                     STOCKHOLDERS' AGREEMENT
                     -----------------------


          This STOCKHOLDERS AGREEMENT is made as of the 31st day of January,
1996, by and among Douglas C. Roberts, individually and as Trustee of (i) the
Douglas C. Roberts Trust dated January 28, 1972, (ii) the David Kim Roberts 1989
Trust, (iii) the Steven Suh Roberts 1989 Trust, and (iv) the Jeffrey King
Roberts 1989 Trust ("Douglas C. Roberts"); Virginia R. Holt, individually and as
Trustee of (i) the Virginia R. Holt Trust dated August 22, 1973, (ii) the Amanda
Mary Holt 1989 Trust, and (iii) the Laura Elizabeth Holt 1989 Trust ("Virginia
R. Holt"); John T. Roberts, individually and as Trustee of (i) the John T.
Roberts Trust dated April 9, 1976, (ii) the Allison Elizabeth Roberts 1989
Trust, and (iii) the Katherine Elsie Roberts 1990 Trust Number 1 ("John T.
Roberts"); Charles C. Roberts and Mary R. Roberts, as Trustees of (i) the
Charles C.and Mary R. Roberts Living Trust dated October 15, 1991, (ii) the
Trust F/B/O Douglas C. Roberts under Eleanor T. Roberts Charitable Trust
Agreement dated December 21, 1967, (iii) the Trust F/B/O Virginia R. Holt under
Eleanor T. Roberts Charitable Trust Agreement dated December 21, 1967, and (iv)
the Trust F/B/O John T. Roberts under Eleanor T. Roberts Charitable Trust
Agreement dated December 21, 1967 ("Charles C. Roberts and Mary R. Roberts");
Lynne King Roberts, as Trustee of the David Kim Roberts Trust dated October 14,
1987 ("Lynne King Roberts"); Terrance K. Holt, as Trustee of the Amanda Mary
Holt Trust dated December 6, 1985 ("Terrance K. Holt"); and Robin R. Roberts, as
Trustee of (I) the Allison Elizabeth Roberts Trust dated August 6, 1986, (ii)
the Katherine Elsie Roberts Trust dated March 13, 1990, and (iii) the Charles




David Roberts Trust dated February 28, 1994 ("Robin R. Roberts"), and Charles C.
Roberts, Mary R. Roberts, Douglas C. Roberts, Virginia R. Holt and John T.
Roberts, as Voting Trustees under the Roberts Family Voting Trust Agreement
(collectively referred to as the "Major A Stockholders" and individually as a
"Major A Stockholder") and Monsanto Company, a Delaware corporation, having its
principal place of business at 800 N. Lindbergh Blvd., St. Louis, Missouri
63167, ("Monsanto").


<PAGE>                      RECITALS
                            --------


          WHEREAS, DEKALB Genetics Corporation, a Delaware corporation, having
its principal place of business at 3100 Sycamore Road, DeKalb, Illinois 60115
(the "Company") and Monsanto have entered into an Investment Agreement, dated as
of January 31, 1996 (the "Investment Agreement"), and certain other related
agreements whereby Monsanto will acquire shares of the Company's Class A Common
Stock, no par value ("Class A Common Stock") and shares of the Company's Class B
Common Stock, no par value ("Class B Common Stock" and, together with the Class
A Common Stock, the "Common Stock");

          WHEREAS, the Major A Stockholders own shares of Class A Common Stock
as indicated on Exhibit "A" to this Agreement;
                -----------




          WHEREAS, pursuant to the Investment Agreement, the Company has agreed
that under certain circumstances Monsanto shall have the right to designate up
to two (2) directors on the Company's Board of Directors;

          WHEREAS, pursuant to the Investment Agreement, the Company has agreed
to amend its Bylaws (as amended, the "Bylaws") and to provide notification to
Monsanto in the event the Company is considering certain business combination
transactions; and

          WHEREAS, the Major A Stockholders have entered into the Roberts Family
Voting Trust Agreement in the form attached hereto as Exhibit B and the Roberts
Family Shareholder Agreement in the form attached hereto as Exhibit C.

          NOW, THEREFORE, in consideration of the premises and the mutual
covenants and conditions herein contained, the Major A Stockholders and Monsanto
hereby agree as follows:




<PAGE>
                            ARTICLE 1
                           Definitions
                           -----------


          As used in this Agreement, the following terms shall have the
following respective meanings (all terms defined in this Article 1 or in other
provisions of this Agreement in the singular shall have the same meaning when
used in the plural and vice versa):
                       ---- -----


     1.1  "Affiliate" has the same meaning as in Rule 12b-2 promulgated under
           ---------

     the Exchange Act.

     1.2  "Board of Directors" means the Board of Directors of the Company.
           ------------------


     1.3  "Business Combination" shall mean a merger or consolidation in which
           --------------------

     the Company is a constituent corporation and pursuant to which the Common
     Stock is converted into or exchanged for cash, securities or other property
     or a sale of all or substantially all of the assets of the Company and its
     subsidiaries taken as a whole, or a sale of all or substantially all the
     assets of the Company's United States seed corn business; provided that a
                                                               --------

     transaction in which the beneficial ownership of the capital stock of the
     Company or of the sole surviving corporation to the transaction (or of the
     ultimate parent of the Company or of such sole surviving corporation)




     immediately after the consummation of such transaction is substantially the
     same as the beneficial ownership of the Company's capital stock immediately
     prior to the consummation thereof shall not be deemed a Business
     Combination unless such transaction shall result in the sale of all or
     substantially all the assets of the Company and its subsidiaries taken as a
     whole or all or substantially all of the assets of the Company's United
     States seed corn business.

     1.4  "Bylaws" has the meaning set forth in the recitals hereto.
           ------




<PAGE>
     1.5  "Class A Common Stock" has the meaning set forth in the recitals
           --------------------

     hereto.

     1.6  "Class B Common Stock" has the meaning set forth in the recitals
           --------------------

     hereto.

     1.7  "Closing Date" means the closing of the purchase of Common Stock by
           ------------

     Monsanto from the Company pursuant to the terms of the Investment
     Agreement.




     1.8  "Common Stock" has the meaning set forth in the recitals hereto.
           ------------


     1.9  "Company" has the meaning set forth in the first paragraph hereof.
           -------


     1.10 "Director" means a member of the Board of Directors.
           --------


     1.11 "Depositor" means a depositor of shares of Common Stock under the
           ---------

     Voting Trust Agreement.

     1.12 "Exchange Act" means the Securities Exchange Act of 1934, as amended,
           ------------

     and the rules and regulations promulgated thereunder.

     1.13 "Monsanto" has the meaning set forth in the first paragraph hereof.
           --------


     1.14 "Monsanto Director" has the meaning set forth in Section 2.1.
           -----------------


     1.15 "hereto", "hereunder", "herein", "hereof" and the like mean and refer
           ------    ---------    ------    ------

     to this Agreement as a whole and not merely to the specific article,
     section, paragraph or clause in which the respective word appears.




<PAGE>
     1.16 "Involuntary Transfer Notice" has the meaning set forth in Section
           ---------------------------

     3.2(e).

     1.17 "Involuntary Transfer Stock" has the meaning set forth in Section
           --------------------------

     3.2(e).

     1.18 "Indemnified Person" has the meaning set forth in Section 2.7(b).
           ------------------


     1.19 "Investment Agreement" means that certain Investment Agreement, dated
           --------------------

     as of January 31, 1996 between the Company and Monsanto.

     1.20 "Losses" has the meaning set forth in Section 2.7(a).
           ------


     1.21 "Major A Stockholder" has the meaning set forth in the first paragraph
           -------------------

     hereof, together with any pledgees and Permitted Transferees who become
     parties to this Agreement pursuant to  Section 3.5 (a) and (b).

     1.22 "Offer Period" has the meaning set forth in Section 3.2(b).
           ------------


     1.23 "Offered Stock" has the meaning set forth in Section 3.2(b).
           -------------




     1.24 "Permitted Transferee" means (i) Douglas C. Roberts, Virginia Roberts
           --------------------

     Holt, John T. Roberts, or their parents, (ii) any Depositor, (iii) any
     spouse, lineal descendant (including adopted descendants), or spouse of a
     lineal descendant (including adopted descendants) of Douglas C. Roberts,
     Virginia Roberts Holt or John T. Roberts, (iv) any trust or other entity
     the sole beneficiaries or owners of which are Persons referred to in this
     definition, (v) any Person receiving any interest in shares of Stock
     pursuant to a Major A Stockholder's last will and testament or by
     distribution at a Major A Stockholder's death from a trust established by a
     Major A Stockholder or according to the laws of intestate succession, or
     (vi) any ex-spouse of Douglas C. Roberts, Virginia Roberts Holt or John T.
     Roberts
     or any ex-spouse of a lineal descendant (including adopted descendants) of
     Douglas C. Roberts, Virginia Roberts Holt or
<PAGE>
     John T. Roberts, to the extent (and only to the extent) that any such ex-
     spouse receives any interest in Stock pursuant to a court order entered in
     connection with a divorce proceeding.

     1.25 "Person" means a corporation, association, partnership, joint venture,
           ------

     limited liability company, individual, trust, unincorporated organization,
     a government agency or political subdivision thereof and any other entity.




     1.26 "Pledge" when used as a verb means to pledge, hypothecate, mortgage,
           ------

     create any security interests in or otherwise encumber and when used as a
     noun means any resulting pledge, hypothecation, mortgage, security interest
     or other encumbrance.

     1.27 "Roberts Family Shareholder Agreement" means the agreement attached
           ------------------------------------

     hereto as Exhibit C.

     1.28 "Roberts Family Voting Trust Agreement" means the agreement attached
           -------------------------------------

     hereto as Exhibit B.

     1.29 "Selling Stockholder" has the meaning set forth in Section 3.2(b).
           -------------------


     1.30 "Stock" means the following securities: (i) the Class A Common Stock
           -----

     of the Company and any other common or preferred stock of the Company
     entitled to vote generally in the election of directors whether presently
     issued or hereafter authorized, designated and issued, now owned or
     hereafter acquired by each Major A Stockholder, (ii) any option, warrant or
     right to acquire Class A Common Stock (or any security or other instrument
     referred to in this definition) and (iii) any security or other instrument
     exchangeable for, or convertible into, Class A Common Stock (or any
     security or other instrument referred to in this definition).




     1.31 "Transfer Notice" has the meaning set forth in Section 3.2(b).
           ---------------

<PAGE>
     1.32 "Transferring Stockholder" has the meaning set forth in Section
           ------------------------

     3.2(e).

     1.33 "Voting Trust" means the trust established under the Roberts Family
           ------------

     Voting Trust Agreement.


                            ARTICLE 2
 Election of Monsanto Directors; Corporate Governance Provisions
 ---------------------------------------------------------------

           in Certificate of Incorporation and Bylaws
           ------------------------------------------


2.1  Monsanto Directors. As set forth in the Investment Agreement, depending on
     ------------------

     its ownership percentage of the Company's Common Stock, Monsanto shall have
     the right to nominate up to two (2) directors (together, the "Monsanto
     Directors" and, individually, a "Monsanto Director") to the Board of
     Directors.  Initially, one Monsanto Director shall be nominated by Monsanto
     within twenty (20) business days after the Closing Date and shall have a
     term expiring at the Company's 1999 annual meeting of stockholders.  If
     Monsanto is entitled to nominate a second director, then such second
     Monsanto Director shall be nominated for election at the Company's 1997




     annual meeting of stockholder and shall have a term expiring at the
     Company's 2000 annual meeting of stockholders.

2.2  Amendment of Bylaws.  As set forth in the Investment Agreement, prior to
     -------------------

     the Closing, the Company has agreed to cause Article IX of the Bylaws to be
     amended as provided in Exhibit "D" hereto.
                            -----------


2.3  Solicitation and Voting of Shares.  In any election of Directors, each
     ---------------------------------

     Major A Stockholder shall use best efforts to attend such stockholder
     meeting (in person or by proxy) for purposes of establishing a quorum and
     shall vote (in
<PAGE>
     person or by proxy) all its shares of Stock in favor of any Monsanto
     Director nominated by Monsanto and recommended by the Board of Directors;
     provided that such Monsanto Director is reasonably satisfactory to the
     Company.

2.4  Amendment of Bylaws. During the term of this Agreement and after the
     -------------------

     adoption by the Company of the amendments to the Bylaws described in
     Exhibit "D" hereto, without the prior written consent of Monsanto, the
     -----------

     Major A Stockholders shall not directly or indirectly initiate any action
     that would result in the amendment of Section 9.3, 9.4, 9.5, 9.6 or 9.7 of
     the Bylaws.





2.5  Implementation of Investment Agreement.  During the term of this Agreement,
     --------------------------------------

     each Major A Stockholder shall vote its shares of Stock in favor of any
     proposed amendment to the Company's Certificate of Incorporation increasing
     the Company's authorized capital stock, which amendment is required in
     order for the Company to comply with the provisions of Article 10 of the
     Investment Agreement.

2.6  Injunctive Relief.  In the event of a breach of the provisions of this
     -----------------

     Article 2 by any of the Major A Stockholders, Monsanto will suffer
     irreparable harm and the total amount of monetary damages will be
     impossible to calculate and will therefore be an inadequate remedy.
     Accordingly, in such event, Monsanto shall be entitled to temporary and
     permanent injunctive relief against the breaching party and to any other
     rights and remedies to which Monsanto may be entitled to at law or in
     equity.


<PAGE>
2.7  Indemnification of Major A Stockholders.
     ---------------------------------------


     (a)  Monsanto's Indemnification Agreement.  Subject to paragraph (b) below,
          ------------------------------------

          Monsanto shall indemnify and hold the Major A Stockholders and their
          respective affiliates, trustees, trust beneficiaries, directors,




          officers, stockholders, employees, agents, successors and assigns
          (each an "Indemnified Person") harmless from and against any and all
          claims, liabilities, fines, penalties, demands, causes of action,
          suits, judgments, losses, injuries, damages (including costs of
          defense, settlement and reasonable attorneys' fees) (all of the
          foregoing hereinafter collectively called "Losses") suffered or
          incurred by any Indemnified Person which arise from or in connection
          with actions or inactions of any Indemnified Person in the performance
          of the obligations of any Major A Stockholder under this Article 2.

     (b)  Procedure.  In the event that, from and after the Closing, a third
          ---------

          person asserts any claim against any Indemnified Person with respect
          to any matter to which the foregoing indemnities apply, the
          Indemnified Person shall give prompt written notice to Monsanto, and
          Monsanto shall have the right, at its election, to take over the
          defense or settlement of such claim at its own expense by giving
          prompt written notice to the Indemnified Person; provided, however,
          that, (i) if Monsanto does not give such notice and does not proceed
          diligently to defend the claim within thirty (30) days after receipt
          of such notice of the claim, then the Indemnified Person may employ
          separate counsel to represent it and defend it against such claim and
          Monsanto shall be bound by any defense or settlement that the
          Indemnified Person may make as to such claim and shall reimburse the
          Indemnified Person for any and all Losses resulting therefrom as such
          Losses are incurred and (ii) if Monsanto elects to defend the claim,




          then Monsanto shall employ counsel reasonably satisfactory to the
          Indemnified Person and the Indemnified Person shall be entitled to
          participate in
<PAGE>
          (but not control) the defense of such claim and to employ separate
          counsel at its own expense to assist in the handling of such claim,
          unless the common counsel determines, in compliance with the canons of
          ethics of the legal profession, that a conflict of interest exists
          between Monsanto and an Indemnified Person, in which event the
          Indemnified Person may appoint separate counsel to represent or defend
          it against the claim and Monsanto shall reimburse such Indemnified
          Person for all Losses resulting therefrom as such Losses are incurred.
           The Indemnified Person and Monsanto shall cooperate in defending any
          such third person's claim, and Monsanto, to the extent Monsanto elects
          to defend such claim, shall have reasonable access to records,
          information and personnel in the possession or control of any other
          party hereto which are applicable to the subject matter of any claim
          or which are otherwise pertinent to the defense of such claim and the
          Indemnified Person shall otherwise cooperate with Monsanto in all
          respects in connection therewith.  Monsanto shall reimburse the
          Indemnified Person for all of the Indemnified Person's reasonable out-
          of-pocket costs as they are incurred in connection with the activities
          set forth in the immediately preceding sentence and in enforcing this
          indemnification.  Notwithstanding the foregoing, Monsanto shall not
          settle or compromise any such claim without the prior written consent
          of the Indemnified Person, such consent not to be unreasonably




          withheld, unless, after consultation between such parties, the terms
          of such settlement or compromise release such Indemnified Person from
          any and all liability with respect to such claim and do not in any
          manner adversely affect the future operations or activities of such
          Indemnified Person.


<PAGE>

                            ARTICLE 3
                 Limitation on Certain Transfers
                 -------------------------------


3.1  General Limitations on Certain Transfers.
     ----------------------------------------


     (a)  Subject to Section 3.5, during the term of this Agreement, no Major A
          Stockholder shall in any manner, whether directly or indirectly,
          voluntarily or by operation of law, sell, convey, transfer, assign, or
          otherwise dispose of ("transfer") any interest in its Stock to any
          Person or convert any of its Class A Common Stock to Class B Common
          Stock except as provided under the terms of this Agreement after
          complying with the provisions of this Article 3.

     (b)  Notwithstanding any other provision of this Agreement including this
          Article 3, in no event shall any Major A Stockholder tender any of its
          shares of Stock in the tender offer to purchase shares of Class B




          Common Stock to be made by Monsanto pursuant to the terms described in
          the Investment Agreement.

3.2  Limitation on Certain Conversions and Transfers.
     -----------------------------------------------


     (a)  Limitation on Conversions.  Except pursuant to a court order entered
          -------------------------

          in connection with a divorce proceeding to an ex-spouse of Douglas C.
          Roberts, Virginia Roberts Holt or John T. Roberts or to an ex-spouse
          of a lineal descendant of Douglas C. Roberts, Virginia Roberts Holt or
          John T. Roberts, no Major A Stockholder shall convert any of its Class
          A Common Stock to Class B Common Stock until such time as such Major A
          Stockholder has entered into a binding agreement to sell or otherwise
          convey such Class B Common Stock to a third party.
<PAGE>
     (b)  Limitations on Voluntary Transfers.  Subject to Section 3.5, in the
          ----------------------------------

          event that any Major A Stockholder desires to transfer any interest in
          its Stock, including, without limitation, a redemption of such Stock
          by the Company, such Major A Stockholder (the "Selling Stockholder")
          shall make a written offer (the "Transfer Notice") to Monsanto stating
          (i) the number of shares of Stock proposed to be so transferred (the
          "Offered Stock") and (ii) the price, form of consideration and other
          material terms upon which the Offered Stock are being offered;
          provided, however, that in the event the Transfer Notice shall state
          that the Major A Stockholder intends to dispose of such Offered Stock




          by means of an underwritten public offering (a "Public Offering"), in
          lieu of stating a price at which the Offered Stock is being offered,
          the Major A Stockholder may state an estimated price (less estimated
          underwriting discounts and expenses of sale) at which the Major A
          Stockholder is advised in writing by the managing underwriter as its
          good faith estimate of the average between the estimated minimum and
          maximum amounts at which such Offered Stock may be sold in the Public
          Offering (the "Average Price").  For a period of twenty-five (25) days
          (if the form of consideration specified in the Transfer Notice only
          includes cash and/or shares of stock traded in the NASDAQ National
          Market System or on a U.S. securities exchange ("traded stock")), or
          ninety (90) days (if the form of consideration specified in the
          Transfer Notice includes property other than cash or traded stock)
          following the date of the Transfer Notice (the "Offer Period"),
          Monsanto shall have the irrevocable and exclusive option (but not
          obligation) to purchase all (but not less than all) of the Offered
          Stock in cash for the price per share and upon the other terms
          specified in the Transfer Notice; provided, however, in the event the
                                            --------  -------

          Transfer Notice shall have stated that the Major A Stockholder intends
          to dispose of the Offered Stock in a Public Offering, Monsanto may
          purchase the Offered Stock at the Average Price (less the estimated
          amount of underwriting discounts and expenses of offering) stated in
          the Transfer Notice; provided, further, that if the proposed
                               --------  -------

          consideration specified in the Transfer
<PAGE>




          Notice includes property other than cash, then Monsanto shall have the
          option to purchase the Offered Stock for consideration other than cash
          that is equal in value to the non-cash property specified in the
          Transfer Notice; and provided, further, that if the consummation of
          the transfer described in the Transfer Notice would cause the Selling
          Stockholder to recognize less gain for income tax purposes than the
          amount of taxable gain which the Selling Stockholder would recognize
          as a result of a cash sale to Monsanto, then the aggregate purchase
          price for the Offered Stock payable by Monsanto shall be increased by
          an amount equal to (A) the gain which would not have otherwise been
          recognized for income tax purposes multiplied by a fraction, the
          numerator of which is one and the denominator of which is one minus
          the highest marginal income tax rate on capital gains for individuals
          in effect at such time, minus (B) the gain which would not have
          otherwise been recognized for income tax purposes.  The gain which
          would not have otherwise been recognized for income tax purposes shall
          be computed using the Selling Stockholder's actual tax basis in the
          Offered Stock based upon (i) such records as Monsanto shall reasonably
          request and (ii) as are certified by such Selling Stockholder as true,
          complete, and correct.  Monsanto's option to purchase the shares of
          Offered Stock shall be exercised by giving written notice to the
          Selling Stockholder within the Offer Period.  Alternatively, if
          Monsanto rejects the Selling Shareholder's offer to sell the Offered
          Stock for the price per share and upon the terms specified in the
          Transfer Notice, then, for the remainder of the Offer Period, Monsanto
          shall have the exclusive right to propose alternative terms to the




          Selling Stockholder for the purchase of the Offered Stock at such
          price per share and upon such terms as the parties may agree upon.

                    Subject to Section 3.5, in the event a Selling Stockholder
          proposes to dispose of Offered Stock in a transaction subject to
          Article 3 hereof for consideration that includes non-cash
          consideration other than traded stock, such Selling Stockholder shall
          stipulate the value of such property in the Transfer
<PAGE>
          Notice and shall, at the request of Monsanto, provide to Monsanto, at
          the Selling Stockholder's expense, a written valuation of such
          property prepared by a nationally-recognized firm experienced in
          appraising the specified type of property , which sets forth the value
          of such property.  In the event that Monsanto does not agree with such
          valuation, Monsanto shall deliver a written notice of such
          disagreement to the Selling Stockholder within fifteen (15) days of
          the receipt of the written valuation and shall thereafter deliver to
          the Selling Stockholder within thirty (30) days following delivery of
          such disagreement, at Monsanto's expense, a written valuation of such
          property prepared on the same basis by another nationally-recognized
          firm experienced in appraising the specified type of property, which
          sets forth the value of such property.  The Selling Stockholder may
          either accept such subsequent valuation or deliver written notice of
          its disagreement with such valuation to such Selling Stockholder.  In
          the latter event, the Selling Stockholder and Monsanto shall agree to
          the appointment of a third nationally-recognized firm experienced in




          appraising the specified type of property, who shall be selected by
          mutual agreement of their respective nationally-recognized firms,
          whose valuation shall establish conclusively the price for purposes of
          the Transfer Notice.  The expense of such third firm shall be borne
          equally by the parties.

                    If property to be received by a Selling Stockholder includes
          shares of stock that are traded on the NASDAQ National Market System
          or any other system then in use, then the value of a share of such
          stock shall be deemed to be the last reported sale price (or, if not
          available, the average of the closing bid and ask price) per share
          during the 30-day period immediately preceding the date of the
          Transfer Notice.  If the property to be received by a Selling
          Stockholder includes shares of a stock that is listed on a United
          States securities exchange registered under the Exchange Act, then the
          value of a share of such stock shall be deemed to be the average of
          the closing
<PAGE>
          sale price per share of such stock during the 30-day period
          immediately preceding the date of the Transfer Notice on the principal
          United States securities exchange registered under the Exchange Act on
          which such stock is listed.

     (c)  Acceptance of Offer.  If, during the Offer Period, Monsanto exercises
          -------------------

          its right to purchase the Offered Stock at the price per share and




          upon the terms specified in the Transfer Notice or if the parties
          otherwise reach an agreement regarding the price, terms and conditions
          of the sale, then the Selling Stockholder shall sell the shares of
          Offered Stock to Monsanto in accordance with the price per share and
          terms specified in the Transfer Notice or pursuant to such price,
          terms and conditions otherwise agreed upon by the parties, including
          standard terms and conditions for a stock purchase agreement.  The
          closing of any such purchase shall take place no later than twenty-
          five (25) days (if the form of consideration specified in the Transfer
          Notice only includes cash or traded stock) or ninety (90) days (if the
          form of consideration specified in the Transfer Notice includes
          property other than cash or traded stock) following the expiration of
          the Offer Period.

     (d)  Nonacceptance of Offer.  If, at the end of the Offer Period, Monsanto
          ----------------------

          has not exercised its right to purchase the Offered Stock at the price
          per share and upon the terms specified in the Transfer Notice and the
          parties have not otherwise reached an agreement regarding the price,
          terms and conditions of the Sale, then such Selling Stockholder shall
          be entitled to offer and sell such shares of Offered Stock to any
          Person (free and clear of any rights of Monsanto) provided that the
          price, terms and conditions of such sale, considered as a whole,  are
          at least as favorable to the Selling Stockholder as either (i) those
          set forth in the Transfer Notice or (ii) those offered by Monsanto in
          any counter offer, if any; provided, in the event the Transfer Notice




          shall have stated an Average Price, the Offered Stock may be disposed
          of in a Public Offering at a price no less than the minimum amount
<PAGE>
          used as a basis to calculate the Average Price (less actual
          underwriting discounts and expenses).  Notwithstanding the foregoing,
          if the Selling Stockholder shall not have signed a definitive
          agreement to sell the Offered Stock within one hundred eighty (180)
          days immediately following the expiration of the Offer Period, then
          the shares of Offered Stock shall again be subject to the terms and
          conditions of this Agreement in the same manner as if the Transfer
          Notice had not been given.

     (e)  Limitations on Involuntary Transfers.  Subject to Section 3.5, if any
          ------------------------------------

          involuntary transfer of any of the Stock owned by a Major A
          Stockholder (a "Transferring Stockholder") shall occur (such as, but
          not limited to, a sale by a Major A Stockholder's trustee in
          bankruptcy, or a sale to a purchaser at any creditor's or court sale)
          other than an involuntary transfer to a Permitted Transferee:

          (i)  Transferee Takes Subject Hereto.  The transferee (which term, as
               -------------------------------

               used herein, shall include any and all transferees and subsequent
               transferees of the initial transferee) shall take and hold such
               Stock subject to all of the restrictions, liabilities and rights
               under this Agreement, which shall continue in full force and
               effect.





          (ii) Involuntary Transfer Notice.  The Transferring Stockholder (or,
               ---------------------------

               if it fails to do so, the transferee) shall promptly give written
               notice (the "Involuntary Transfer Notice") to Monsanto and the
               Company stating (a) when the involuntary transfer occurred or is
               to occur, (b) the circumstances alleged to require such transfer,
               (c) the number of shares of Stock involved and (d) the name,
               address and capacity of the transferee.  If both the Transferring
               Stockholder and the transferee shall fail to give the Involuntary
               Transfer Notice, then the Involuntary Transfer Notice may be
               given by the Company or by any other stockholder of the Company
               and the Involuntary Transfer Notice so given may contain only
               such portion of the information set forth in the preceding
               sentence as shall be known to the Person so giving the
               Involuntary Transfer Notice.
<PAGE>
          (iii)     Purchase Option.  Monsanto shall have the irrevocable and
                    ---------------

               exclusive option (but not the obligation) for a period of forty-
               five (45) days immediately following receipt of the Involuntary
               Transfer Notice to purchase all but not less than all of the
               shares of Stock included in the Involuntary Transfer Notice (the
               "Involuntary Transfer Stock") in cash for the price per share and
               upon the terms and conditions set forth in this Section 3.2(e).
               An election to exercise Monsanto's option shall be made by




               Monsanto by giving written notice to the Company, the transferee
               and the Transferring Stockholder.

          (iv) Failure to Give Notice.  Failure by Monsanto to give the notice
               ----------------------

               provided for in paragraph (e)(iii) within the time period
               provided for therein shall be deemed an election by Monsanto not
               to purchase any shares of the Involuntary Transfer Stock.

          (v)  Closing.  If the shares of Involuntary Transfer Stock are to be
               -------

               purchased by Monsanto pursuant to this Section 3.2(e), then such
               purchase shall, unless the parties thereto otherwise agree, be
               completed at the principal office of Monsanto on the thirtieth
               (30th) day following the giving of notice by Monsanto pursuant to
               paragraph (e)(iii) of its election to exercise its option to
               purchase the Involuntary Transfer Stock.

          (vi) Purchase Price.  The price per share of the Involuntary Transfer
               --------------

               Stock to be paid by Monsanto upon exercise of its option to
               purchase such Involuntary Transfer Stock pursuant to paragraph
               (e)(iii) shall be as follows:
<PAGE>
               (a)  With respect to shares of Class A Common Stock, if the
                    shares of the Company's Class B Common Stock are then traded
                    in the NASDAQ National Market System or on a United States




                    securities exchange registered under the Exchange Act, the
                    price per share shall be the average of the last reported
                    sales price (or, if not available, the average of the
                    closing bid and ask price) per share of the Company's Class
                    B Common Stock on the NASDAQ National Market System (or such
                    other securities exchange on which the Company's Class B
                    Common Stock is then listed) on each of the thirty (30)
                    trading days immediately preceding the closing of the
                    purchase of such Class A Common Stock; and

               (b)  With respect to shares of any Involuntary Transfer Stock
                    other than Class A Common Stock, or, with respect to shares
                    of Class A Common Stock if the Company's Class B Common
                    Stock is not then listed on the NASDAQ National Market
                    System or on a United States securities exchange registered
                    under the Exchange Act, the price per share shall be the
                    fair market value per share as determined by an investment
                    banking firm of recognized standing selected by mutual
                    agreement of the transferee or Transferring Stockholder, as
                    the case may be (depending on who is the legal owner of the
                    Involuntary Transfer Stock), and Monsanto.  If the
                    transferee or the Transferring Stockholder, as the case may
                    be, and Monsanto are unable to agree upon an investment
                    banking firm to perform the valuation, then both Monsanto
                    and the transferee or the Transferring Stockholder, as the
                    case may be, shall select an investment banking firm and the




                    two investment banking firms so selected shall select a
                    third investment banking firm to perform the valuation.  The
                    determination of the third investment banking firm as to the
                    fair market value per share shall be final and binding on
                    the parties.  If the parties are unable to mutually agree
                    upon an investment banking firm to perform the valuation,
                    then Monsanto and the transferee or the Transferring
                    Stockholder, as the case

<PAGE>
                    may be, shall pay the fees of the investment banking firm
                    selected by each such party.  The fees of any investment
                    banking firm mutually agreed upon by the parties and the
                    fees of any third investment banking firm performing the
                    valuation in connection with the services provided pursuant
                    to this paragraph (e)(vi) shall be paid fifty percent (50%)
                    by Monsanto and fifty percent (50%) by the transferee or the
                    Transferring Stockholder, as the case may be.

               (vii)     Delivery of Certificates.  At the closing of the
                         ------------------------

                    purchase and sale of Involuntary Transfer Stock pursuant to
                    the exercise of options granted under this Section 3.2, the
                    Transferring Stockholder or the transferee, as the case may
                    be, shall deliver to Monsanto duly endorsed for transfer,
                    with all required state or federal documentary tax stamps




                    affixed thereto, certificates representing all of the shares
                    of Involuntary Transfer Stock being purchased and sold at
                    such closing against payment therefor in cash or certified
                    or bank cashier's check.  In addition, the Transferring
                    Stockholder or the transferee, as the case may be, shall
                    deliver to Monsanto such signature guarantees and other
                    documents and certificates as may be reasonably requested by
                    Monsanto in order to confirm the Transferring Stockholder's
                    or the transferee's, as the case may be, title to such
                    Involuntary Transfer Stock and its authority to act in
                    connection with the sale thereof.

<PAGE>
3.3  Legend.  A copy of this Agreement shall be filed with the Secretary of the
     ------

     Company and shall be kept at its principal executive office.  Upon the
     execution of this Agreement, each of the Major A Stockholders shall cause
     each certificate representing shares of Stock owned by such Major A
     Stockholder to carry a legend as follows:

          THE SECURITIES REPRESENTED BY THIS CERTIFICATE MAY NOT BE SOLD,
          CONVEYED, TRANSFERRED, ASSIGNED, PLEDGED, HYPOTHECATED, MORTGAGED OR
          OTHERWISE DISPOSED OF UNLESS SUCH TRANSFER COMPLIES WITH THE
          PROVISIONS OF A STOCKHOLDERS' AGREEMENT DATED AS OF JANUARY 31, 1996,
          A COPY OF WHICH IS ON FILE AT THE OFFICES OF THE COMPANY.




     Upon the acquisition of additional shares of Stock after the date hereof,
     each Major A Stockholder shall cause each certificate representing such
     additional shares of Stock to carry the above legend.

3.4  Nonrecognition of Certain Transfers.  Any transfer, acquisition or
     -----------------------------------

     conversion of shares of Stock in violation of this Agreement shall be null
     and void.  Each Major A Stockholder agrees that any such transfer,
     acquisition or conversion may and should be enjoined.

3.5  Exceptions.  The provisions of this Article 3 shall not apply to:
     ----------


     (a)  a Pledge of Stock or any interest therein to a bank or other reputable
     lending institution in a bona fide loan transaction and not made in bad
     faith to avoid the provisions of this Article 3; provided, however, if the
<PAGE>
     pledgee is not a party to this Agreement it shall execute a counterpart of
     this Agreement acknowledging that it has become a party to this Agreement
     with respect to the shares of Stock so pledged, after which such pledgee
     shall be deemed a Major A Stockholder;

     (b)  a transfer, directly or indirectly, voluntarily or involuntarily, of
     any interest in Stock to a Permitted Transferee (including transfers of
     Voting Trust Certificates or interests in Stock pursuant to the Roberts
     Family Voting Trust Agreement and the Roberts Family Shareholder
     Agreement); provided, however, that the Permitted Transferee, if not then a




     party to this Agreement, shall execute a counterpart to this Agreement
     acknowledging that it has become a party to this Agreement with respect to
     the shares of Stock so transferred, after which such Permitted Transferee
     shall be deemed a Major A Stockholder;

     (c)  the appointment of or transfer of any interest in Stock to any
     trustee, guardian, executor, administrator, Voting Trustee of the Voting
     Trust or other fiduciary acting solely for the benefit of one or more
     Permitted Transferees;

     (d)  the granting of a proxy with respect to Stock solicited by the Board
     of Directors;

     (e)  any exchange, conversion or transfer of Stock in connection with a
     Business Combination; provided, however, that this clause (e) shall not
     permit any agreement to sell or otherwise transfer any interest in Stock
     (including the granting of any proxy to the acquiror) by any Major A
     Stockholder prior to the Company's execution of an agreement with respect
     to such Business Combination; or

     (f)  any tender or exchange of Stock in accordance with the terms of any
     tender or exchange offer, which tender or exchange offer would result, if
     consummated in accordance with its terms, in the beneficial ownership by
     any Person or group (within the meaning of Rule 13d-3 of the Exchange Act)
<PAGE>




     of all of the Class A Common Stock and Class B Common Stock; provided,
     however, that this clause (f) shall not permit any Major A Stockholder to
     surrender (or enter into a binding agreement to sell or surrender) any
     Stock or interest therein in connection with such tender or exchange offer
     unless the Company has previously published to security holders of the
     Company a statement pursuant to Rule 14e-2 (or any successor rule) under
     the Exchange Act.


                            ARTICLE 4
                          Miscellaneous
                          -------------


4.1  Governing Law.  This Agreement shall be governed in all respects by the
     -------------

     laws of the State of Delaware (exclusive of such state's choice of laws
     rules).

4.2  Successors and Assigns.  Neither this Agreement nor any of the rights,
     ----------------------

     interests or obligations under this Agreement shall be assigned or
     transferred, in whole or in part, by any of the parties without the prior
     written consent of the other parties hereto, except that Monsanto may,
     without the prior written consent of the other parties hereto, assign all
     or any of its rights, interests, and obligations under this Agreement to a
     wholly owned, direct or indirect, United States subsidiary of Monsanto,
     provided that Monsanto (i) shall remain liable for the performance by any




     such subsidiary of its obligations under this Agreement, (ii) shall act as
     agent for any and all such subsidiaries in connection with the receipt and
     giving of notices under this Agreement and (iii) shall not cause or permit
     any such subsidiary to be other than a wholly owned direct or indirect
     subsidiary of Monsanto.  Subject to the preceding sentence and  as
     otherwise provided herein, the provisions hereof shall inure to the benefit
     of, and be binding upon, the successors, permitted assigns, heirs,
     executors, and administrators of the parties hereto.

4.3  Entire Agreement.  This Agreement constitutes the complete, exclusive and
     ----------------

     final understanding and agreement between the parties with regard to the
     subjects hereof.
<PAGE>
4.4  Notices.  Any notice required or permitted to be given under this Agreement
     -------

     shall be in writing, and shall be deemed sufficiently given when delivered
     in person or transmitted by telegram or telecopier (confirmed by mail) or
     by a national overnight delivery service, addressed as follows:

     If to Monsanto:          Monsanto Company
                         800 N. Lindbergh Blvd.
                         St. Louis, MO 63167
                         Attention:  Chief Financial Officer

                         Telecopy Number:  (314) 694-3001




          with a copy to:

                         Monsanto Company
                         800 N. Lindbergh Blvd.
                         St. Louis, MO 63167
                         Attention:  General Counsel and Secretary

                         Telecopy Number:  (314) 694-3001


     If to Douglas C. Roberts:     Douglas C. Roberts
                         DEKALB Genetics Corporation
                         3100 Sycamore Road
                         DeKalb, IL 60115

                         Telecopy Number:  (815) 758-3711


<PAGE>
          with a copy to:     Frank H. Roberts, Esq.
                         Pillsbury, Madison & Sutro LLP
                         225 Bush Street
                         San Francisco, CA 94104

                         Telecopy Number:  (415) 983-1200




     If to Lynne King Roberts:     Lynne King Roberts
                         c/o Douglas C. Roberts
                         DEKALB Genetics Corporation
                         3100 Sycamore Road
                         DeKalb, IL 60115

                         Telecopy Number:  (815) 758-3711

          with a copy to:     Frank H. Roberts, Esq.
                         Pillsbury, Madison & Sutro LLP
                         225 Bush Street
                         San Francisco, CA 94104

                         Telecopy Number:  (415) 983-1200


     If to Terrance K. Holt:  Terrance K. Holt
                         2329 Clover Lane
                         Northfield, IL 60093

                         Telecopy Number: (708) 572-1818

          with a copy to:     Frank H. Roberts, Esq.
                         Pillsbury, Madison & Sutro LLP
                         225 Bush Street
                         San Francisco, CA 94104





                         Telecopy Number:  (415) 983-1200


     If to Virginia R. Holt:       Virginia R. Holt
                         2329 Clover Lane
                         Northfield, IL 60093

                         Telecopy Number: (708) 572-1818


     <PAGE>
     with a copy to:     Frank H. Roberts, Esq.
                         Pillsbury, Madison & Sutro LLP
                         225 Bush Street
                         San Francisco, CA 94104

                         Telecopy Number:  (415) 983-1200


     If to John T. Roberts:        John T. Roberts
                         2090 Mulsanne Drive
                         Zionsville, IN 46077

                         Telecopy Number: (317) 594-4501




          with a copy to:     Frank H. Roberts, Esq.
                         Pillsbury, Madison & Sutro LLP
                         225 Bush Street
                         San Francisco, CA 94104

                         Telecopy Number:  (415) 983-1200


     If to Robin R. Roberts:  Robin R. Roberts
                         2090 Mulsanne Drive
                         Zionsville, IN 46077

                         Telecopy Number: (317) 594-4501

          with a copy to:     Frank H. Roberts, Esq.
                         Pillsbury, Madison & Sutro LLP
                         225 Bush Street
                         San Francisco, CA 94104

                         Telecopy Number:  (415) 983-1200


     or to such other address as may be specified from time to time in a notice
     given by such party.  The parties agree to acknowledge in writing the
     receipt of any such notice delivered in person.
<PAGE>




4.5  Delays or Omissions.  Except as otherwise provided in this Agreement, no
     -------------------

     delay or omission to exercise any right, power or remedy accruing to
     Monsanto, upon any breach or default of or any Major A Stockholder under
     this Agreement, shall impair any such right, power or remedy of Monsanto
     nor shall it be construed to be a waiver of any such breach or default, or
     an acquiescence therein, or of or in any similar breach or default
     thereafter occurring.  Any waiver, permit, consent or approval of any kind
     or character on the part of any party or any waiver on the part of any
     party of any provisions or conditions of this Agreement must be made in
     writing and shall be effective only to the extent specifically set forth in
     such writing.  All remedies, either under this Agreement, at law, in equity
     or otherwise afforded to any party, shall be cumulative and not
     alternative.

4.6  Counterparts.  This Agreement may be executed in any number of
     ------------

     counterparts, each of which shall be an original, but all of which together
     shall constitute one instrument.

4.7  Severability.  In the event that any provision of this Agreement becomes or
     ------------

     is declared by a court of competent jurisdiction to be illegal,
     unenforceable or void, this Agreement shall continue in full force and
     effect without said provision; provided, however, that no such severability
     shall be effective if it materially changes the economic benefit of this
     Agreement to any party.





4.8  Sections and Articles.  All sections and articles referred to herein are
     ---------------------

     sections and articles of this Agreement.

4.9  Headings.  Headings as to the contents of particular articles and sections
     --------

     are for convenience only and are in no way to be construed as part of this
     Agreement or as a limitation of the scope of the particular articles or
     sections to which they refer.



<PAGE>
4.10 Term.  The provisions of this Agreement shall be effective from the date
     ----

     hereof until the earlier of (i) the termination of the Collaboration
     Agreement and License between Monsanto and the Company dated of even date
     herewith (except if the same is terminated by reason of a material breach
     thereof by the Company or by reason of a governmental decree caused by the
     voluntary action of the Company), (ii) such time as Monsanto owns less than
     (A) five percent (5%) of the outstanding Class A Common Stock or (B) less
     than fifty percent (50%) of the highest percent of the outstanding Common
     Stock as is beneficially owned by Monsanto after completion of the tender
     offer contemplated by the Investment Agreement, the Closing and any
     purchases in the market of Class B Common Stock by Monsanto as permitted
     under the Investment Agreement during the one year period after the




     Closing, (iii) the date on which the Investment Agreement is terminated and
     (iv) on the eleventh anniversary of the Closing or any subsequent
     anniversary of the Closing if either Monsanto on the one hand or a majority
     in interest of Stock beneficially owned by the Persons who are then Major A
     Stockholders on the other gives written notice to all other parties hereto
     that this Agreement shall terminate on any such anniversary which is more
     than 60 days after the date of such notice.

4.11 Effective Date.  The provisions of this Agreement shall be effective as of
     --------------

     the consummation of the Closing.  If the Investment Agreement is terminated
     prior to the consummation of the Closing, then the provisions of this
     Agreement shall be null and void and of no further force or effect and this
     Agreement shall be deemed to be terminated.

          IN WITNESS WHEREOF, the parties have caused this Agreement to be duly
executed and delivered as of the day and year first above written.

                              Monsanto Company

                              Robert T. Fraley
                              President, Ceregen


<PAGE>




                              Douglas C. Roberts



                              Douglas C. Roberts, individually and as Trustee of
                              (i) the Douglas C. Roberts Trust dated January 28,
                              1972, (ii) the David Kim Roberts 1989 Trust, (iii)
                              the Steven Suh Roberts 1989 Trust, and (iv) the
                              Jeffrey King Roberts 1989 Trust


                              <PAGE>
                              Virginia R. Holt


                              Virginia R. Holt, individually and as Trustee of
                              (i) the Virginia R. Holt Trust dated August 22,
                              1973, (ii) the Amanda Mary Holt 1989 Trust, and
                              (iii) the Laura Elizabeth Holt 1989 Trust


                              <PAGE>
                              John T. Roberts







                              John T. Roberts, individually and as Trustee of
                              (i) the John T. Roberts Trust dated April 9, 1976,
                              (ii) the Allison Elizabeth Roberts 1989 Trust, and
                              (iii) the Katherine Elsie Roberts 1990 Trust
                              Number 1

                              <PAGE>
                              Charles C. Roberts and Mary R. Roberts




                              ------------------------------
                              Charles C. Roberts and Mary R. Roberts, as
                              Trustees of (i) the Charles C.and Mary R. Roberts
                              Living Trust dated October 15, 1991, (ii) the
                              Trust F/B/O Douglas C. Roberts under Eleanor T.
                              Roberts Charitable Trust Agreement dated December
                              21, 1967, (iii) the Trust F/B/O Virginia R. Holt
                              under Eleanor T. Roberts Charitable Trust




                              Agreement dated December 21, 1967, and (iv) the
                              Trust F/B/O John T. Roberts under Eleanor T.
                              Roberts Charitable Trust Agreement dated December
                              21, 1967


                              <PAGE>
                              Lynne King Roberts



                              Lynne King Roberts, as Trustee of the David Kim
                              Roberts Trust dated October 14, 1987


                              <PAGE>
                              Terrance K. Holt



                              Terrance K. Holt, as Trustee of the Amanda Mary
                              Holt Trust dated December 6, 1985





                              <PAGE>
                              Robin R. Roberts


                              Robin R. Roberts, as Trustee of (i) the Allison
                              Elizabeth Roberts Trust dated August 6, 1986, (ii)
                              the Katherine Elsie Roberts Trust dated March 13,
                              1990, and (iii) the Charles David Roberts Trust
                              dated February 28, 1994




<PAGE>
                           EXHIBIT "A"

                                                       SHARES OF CLASS A
MAJOR A STOCKHOLDER                                  COMMON STOCK
- -------------------                                  ------------


Douglas C. Roberts, as Trustee of the Douglas C.
Roberts Trust dated January 28, 1972                      116,769

Douglas C. Roberts, as Trustee of the David Kim
Roberts 1989 Trust                                          7,000

Douglas C. Roberts, as Trustee of the Steven Suh
Roberts 1989 Trust                                          7,000

Douglas C. Roberts, as Trustee of the Jeffrey
King Roberts 1989 Trust                                     7,000

Virginia R. Holt, as Trustee of the Virginia R.
Holt Trust dated August 22, 1973                          123,672

Virginia R. Holt, as Trustee of the Amanda Mary
Holt 1989 Trust                                             7,000

Virginia R. Holt, as Trustee of the Laura




Elizabeth Holt 1989 Trust                                   7,000

John T. Roberts, as Trustee of the John T.
Roberts Trust dated April 9, 1976                         122,414

John T. Roberts, as Trustee of the Allison
Elizabeth Roberts 1989 Trust                                7,000

John T. Roberts, as Trustee of the Katherine
Elsie Roberts 1990 Trust #l                                 7,000




<PAGE>
                                                       SHARES OF CLASS A
MAJOR A STOCKHOLDER                                  COMMON STOCK
- -------------------                                  ------------


Charles C. Roberts and Mary R. Roberts, as
Trustees of the Charles C. and Mary R. Roberts
Living Trust dated October  15, 1991                       10,113

Charles C. Roberts and Mary R. Roberts, as
Trustees of the Trust F/B/O Douglas C. Roberts
under Eleanor T. Roberts Charitable Trust
Agreement dated December 21, 1967                           5,667

Charles C. Roberts and Mary R. Roberts, as
Trustees of the Trust F/B/O Virginia R. Holt
under Eleanor T. Roberts Charitable Trust
Agreement dated December 21, 1967                           3,784

Charles C. Roberts and Mary R. Roberts, as
Trustees of the Trust F/B/O John T. Roberts
under Eleanor T. Roberts Charitable Trust
Agreement dated December 21, 1967                           3,941

Lynne King Roberts, as Trustee of the David Kim
Roberts Trust dated October 14, 1987                        1,618





Terrance K. Holt, as Trustee of the Amanda Mary
Holt Trust dated December 6, 1985                           3,598

Robin R. Roberts, as Trustee of the Allison
Elizabeth Roberts Trust dated August 6, 1986                3,739

Robin R. Roberts, as Trustee of the Katherine
Elsie Roberts Trust dated March 13, 1990                      480

Robin R. Roberts, as Trustee of the Charles
David Roberts Trust dated February 28, 1994                   480







                                        -2-


    <PAGE>
                                                                       EXHIBIT B





    See Exhibit 99.1 entitled Roberts Family Voting Trust Agreement to the
                              -------------------------------------

    Schedule 13D filed by Douglas C. Roberts, Virginia R. Holt, John T. Roberts,
    Charles C. Roberts and Mary R. Roberts filed February 5, 1996.

    <PAGE>
                                                                       EXHIBIT C



    See Exhibit 99.2 entitled Roberts Family Shareholder Agreement to the
                              ------------------------------------

    Schedule 13D filed by Douglas C. Roberts, Virginia R. Holt, John T. Roberts,
    Charles C. Roberts and Mary R. Roberts filed February 5, 1996.




<PAGE>
                                                                       EXHIBIT D



   AMENDED BYLAWS OF THE COMPANY TO CONTAIN THE FOLLOWING BY-LAW PROVISIONS:

     - Section 9.3       Primary Business.  The Primary Business of the
                         ----------------

     Corporation shall be the research-based production, marketing, licensing
     and sale of agronomic seed, including both technology related thereto and
     products derived therefrom.

     - Section 9.4       Use of Voting Securities.
                         ------------------------


          i)   The use of the Corporation's Voting Securities to facilitate
               strategic collaborations is in the Corporation's interest, but as
               to any one strategic collaboration, the maximum amount of Voting
               Securities to be issued to any Person or Group shall not exceed
               10 percent of Voting Securities of the Corporation outstanding at
               the time of issuance.

          (ii)      As used in this Section 9.4, the following terms shall have
               the meanings set forth:  "Voting Securities" means any shares of
               capital stock or other securities of the Corporation entitled to
               vote generally in the election of directors, (including the right




               to elect one or more directors as a class unless such right is
               only exercisable during the continuance of a defined event.)

               "Person" means any individual, limited partnership, general
               partnership, trust, corporation or other firm or entity.

               "Group" shall have the meaning ascribed in Section 13(d)(3) of
               the Securities Exchange Act of 1934, as amended, or any successor
               provision thereto.

     - Section 9.5       Acquisitions.  The Corporation shall not acquire, in a
                         ------------

     single transaction or in series of related transactions, any business or
     assets outside of the Primary Business of the Corporation that would be
     equal to or greater in amount than twenty-five percent (25%) of the total
     consolidated assets of the Corporation as shown on the Corporation's
     consolidated balance sheet as of the end of the most recent fiscal quarter
     ending prior to the time the determination is made whether such acquisition
     be by merger or consolidation or the purchase of stock or assets or
     otherwise;

     - Section 9.6       "Permitted Transactions".  No transaction which would
                          ----------------------

     result in the change of the Primary Business of the Corporation as set
     forth in Section 9.3, no issuance of Voting Securities to facilitate a
     strategic
<PAGE>




     collaboration in contravention of Section 9.4 and no acquisition of any
     business or assets outside the Primary Business of the Corporation in
     contravention of Section 9.5 shall be approved by the Board of Directors if
     the resolution regarding such transaction receives the negative vote of at
     least three directors after the 1997 annual meeting of stockholders and at
     least two directors prior to the 1997 annual meeting of stockholders.

     - Section 9.7       Certain Amendments. The Corporation shall not amend
                         ------------------

     Sections 9.3, 9.4, 9.5, 9.6 or 9.7 hereof if the resolution regarding such
     amendment receives the negative vote of at least one director, or two
     directors after the 1997 annual meeting of stockholders.



<PAGE>
                             JOINT FILING AGREEMENT
                             ----------------------



          Pursuant to Rule 13d-1(f)(1)(iii) of Regulation 13D-G of the General
Rules and Regulations of the Securities and Exchange Commission under the
Securities Exchange Act of 1934, as amended, the undersigned agree that the
statement on Schedule 13D to which this Exhibit is attached is being, and any
and all amendments thereto may be, filed on behalf of each of the undersigned.




Dated:  February 2, 1996


Douglas C. Roberts
- ------------------

Douglas C. Roberts

Virginia Roberts Holt
- ---------------------

Virginia Roberts Holt

John T. Roberts
- ---------------

John T. Roberts

Charles C. Roberts
- ------------------

Charles C. Roberts

Mary R. Roberts
- ---------------

Mary R. Roberts



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