Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

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¨     Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 1.01.       Entry into a Material Definitive Agreement.

On April 1, 2011, Monsanto Company (“the Company”) entered into a $2 billion, four-year revolving credit agreement (the “Four-Year Credit Agreement”) with certain lender parties thereto; JPMorgan Chase Bank, N.A., as administrative agent, Citibank, N.A. and Bank of America, N.A., as co-syndication agents, Barclays Bank plc, Goldman Sachs Bank USA, The Royal Bank of Scotland plc, The Bank of Tokyo-Mitsubishi UFJ, Ltd. and Morgan Stanley Senior Funding, Inc., as co-documentation agents, and J.P. Morgan Securities LLC, Citigroup Global Markets Inc. and Merrill Lynch, Pierce, Fenner & Smith Incorporated, as co-lead arrangers and joint bookrunners.  This agreement replaces the Company’s $2 billon five-year revolving credit agreement, dated as of February 28, 2007 (the “Prior Agreement”).

Under the terms of the Four-Year Credit Agreement, the Company may obtain and utilize from time to time up to
$2 billion in revolving credit loans and competitive bid advances for general corporate purposes, which may include working capital, acquisitions, capital expenditures, refinancing and support of commercial paper borrowings.  The Company may request increases in the lending commitments under the Four-Year Credit Agreement, but the aggregate lending commitments may not exceed $2.5 billion.  Borrowings under the Four-Year Credit Agreement may be made in US Dollars or in Euros.  Borrowings (other than competitive bid advances) bear interest at one of two rates as described in the Four-Year Credit Agreement.  Up to $150 million of the total credit facility under the Four-Year Credit Agreement is available for the issuance of letters of credit in US Dollars.  Additionally, up to $150 million of the total credit facility is available to the Company for swing line loans in US Dollars, available on a same-day basis.

There are fees owed to the lenders, as described in the Four-Year Credit Agreement. Such fees, as well as the interest rate margin under the Four-Year Credit Agreement, are subject to adjustment based on changes in the Company’s credit ratings. The Four-Year Credit Agreement contains affirmative, negative and financial covenants customary for such financings, including, among other things, limits on the incurrence of debt, the incurrence of liens, and mergers and consolidations.  The Four-Year Credit Agreement also contains customary representations and warranties.  Breaches of the covenants, representations or warranties may be grounds for termination.  Other events of default include the Company’s failure to pay certain debt, the acceleration of certain debt, certain insolvency, bankruptcy or ERISA events, unpaid judgments over a specified amount, or a change in control as specified in the Four-Year Credit Agreement.  The covenants, representations, warranties and other events of default are substantially similar to those in the Prior Agreement.

The Four-Year Credit Agreement expires on April 1, 2015.  Under circumstances specified in the Four-Year Credit Agreement, the Company may request up to two one-year extensions of such termination date.  The Company has the right, subject to certain conditions set forth in the Four-Year Credit Agreement, to designate certain foreign subsidiaries of the Company as borrowers under the Four-Year Credit Agreement.  In connection with any such designation, the Company is required to guarantee the obligations of any such subsidiaries under the agreement.

In addition to the Four-Year Credit Agreement, the Company maintains other commercial and investment banking relationships with the lenders and their affiliates.

A copy of the Four-Year Credit Agreement is filed as Exhibit 10.1 hereto and is incorporated by reference herein.  The description of the Four-Year Credit Agreement above is qualified in its entirety by reference to the full text of the Four-Year Agreement.

Item 1.02.       Termination of a Material Definitive Agreement.

In connection with its entry into the Four-Year Credit Agreement described in Item 1.01 of this Form 8-K, the Company terminated the $2 billion Five-Year Credit Agreement dated as of February 28, 2007, among the Company; the initial lenders named therein; JPMorgan Chase Bank, N.A., Citibank, N.A., ABN AMRO Bank N.V., The Bank of Tokyo-Mitsubishi, Ltd., Chicago Branch, Bank of America, N.A., Barclays Bank Plc, The Royal Bank of Scotland Plc, J.P. Morgan Securities Inc. and Citigroup Global Markets Inc.

The information provided in Item 1.01 of this Form 8-K is hereby incorporated into this Item 2.03.

Item 9.01.       Financial Statements and Exhibits.  The following exhibits are filed as part of this report:

Exhibit 10.1       Four-Year Credit Agreement dated April 1, 2011

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXHIBIT INDEX