EXHIBIT A

                                                   December 10, 1997

                 PROCEDURES FOR DETERMINING CHANGES IN
                 BENEFICIAL OWNERSHIP OF COMMON STOCK

- -   Effective November 14, 1985, the Articles of Incorporation of
    Pioneer Hi-Bred International, Inc. (the "Company") were amended
    (the "Voting Amendment") to provide that, subject to the
    provisions below, every share of the Company's Common Stock is
    entitled to five (5) votes per share if it has been beneficially
    owned continuously by the same holder for a period of 36
    consecutive months preceding the record date for the
    shareholders' meeting. All other shares carry one (1) vote.

- -   In general, the Voting Amendment provides that a change in
    beneficial ownership of a share of Common Stock occurs whenever
    any change occurs in the person or group who has, or shares,
    voting power, investment power, the right to receive sale
    proceeds, or the right to receive dividends or other
    distributions with respect to such share.

- -   In the absence of proof to the contrary provided in accordance
    with the procedures referred to below, a change in beneficial
    ownership shall be deemed to have occurred whenever a share of
    Common Stock is transferred of record into the name of any
    person.

- -   In the case of a share of Common Stock held of record in the
    name of a corporation, partnership, voting trustee, bank, trust
    company, broker, nominee or clearing agency, or in any other name
    except that of a natural person, if it has not been established
    pursuant to such procedures that there has been no change in the
    person or persons who direct the exercise of the powers or rights
    referred to above with respect to such share of Common Stock
    during the period of 36 months immediately preceding the date on
    which a determination is made of the shareholders who are
    entitled to take any action, then a change in beneficial
    ownership shall be deemed to have occurred during such period.

- -   There are several exceptions and qualifications to the terms of
    the Voting Amendment described above. For a copy of the complete
    Voting Amendment, please contact the Company at the address
    listed below.

- -   Shareholders who hold their shares in "street name" or through
    any other method specified above are required to submit proof of
    continued beneficial ownership to the Company in order to be
    entitled to five (5) votes per share. Such proof must consist of
    a written certification by the record owner that there has been
    no change in beneficial ownership (as defined in the Voting
    Amendment) during the relevant period. The required form for this
    certification is attached. The Company reserves the right,
    however, to require evidence in addition to the certification in
    situations where it reasonably believes an unreported change may
    have occurred. Proof (including certifications) will be accepted
    only if it is received by the Tabulating Agent at least five (5)
    days before the date for the shareholders' meeting.

- -   The Company will notify shareholders of record who are natural
    persons, in advance of a shareholders' meeting, of the Company's
    determination as to the number of shares for which they are
    entitled to five (5) votes per share and the number of shares for
    which they are entitled to one (1) vote. This determination will
    be shown on the Proxy cards for such shareholders. Shareholders
    of record who disagree with such determination may certify that
    no change in beneficial ownership has occurred during the
    relevant period by following the same procedure set out in the
    previous paragraph for other shareholders.

For Further Information
- -----------------------

For further information concerning the Voting Amendment in general, or
its applicability to a shareholder's particular circumstances,  please
contact the Company:

              Pioneer Hi-Bred International, Inc. 
              800 Capital Square, 400 Locust Street 
              Des Moines, IA 50309 
              Attention: Jerry L. Chicoine, Secretary 
              Telephone number: 515-248-4800 or (800)247-5258





                  PIONEER HI-BRED INTERNATIONAL, INC.

                    SHAREHOLDER CERTIFICATION FORM
                                  FOR
                    ANNUAL MEETING OF SHAREHOLDERS
                                  ON
                           JANUARY 27, 1998

               USE ONLY IF YOU CLAIM MORE VOTING RIGHTS
                   THAN INDICATED ON YOUR PROXY CARD

The undersigned certifies that:

    1.   Of the _______________ shares of the Company's Common Stock
held of record by the undersigned on the close of business on November
28, 1997, ________________ shares have been beneficially owned
continuously by the same person since November 28, 1994; and

    2.   (Applicable only to shareholders who are natural persons) --
the following is a statement supporting why the undersigned disagrees
with the Company's determination of the voting power (as shown on the
Proxy card) to which the undersigned is entitled in connection with
the Annual Meeting:

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           Dated: ______________________________________

- ------------------------------------      ------------------------------------
(Print Shareholder Name)                  (Print Shareholder Name)

- ------------------------------------      ------------------------------------
Signature of Shareholder(s)               Signature of Shareholder(s)

Please sign exactly as name appears on the Proxy for the Annual
Meeting. When shares are held by joint tenants, both should sign. When
signing as attorney, executor, administrator, trustee or guardian,
please give full title as such. If a corporation, please sign in full
corporate name by the President or other authorized officer. If a
partnership, please sign in partnership name by authorized person.

THIS CERTIFICATION SHOULD BE RETURNED IN THE ENCLOSED POSTAGE PAID
ENVELOPE PROVIDED.