SECOND AMENDMENT TO ANHYDROUS AMMONIA SALES AGREEMENT

THIS SECOND AMENDMENT TO ANHYDROUS AMMONIA SALES AGREEMENT (this “Second Amendment”) is dated November 3, 2006 and effective July 1, 2006 (the “Effective Date”), by and between Koch Nitrogen Company (“KNC”), Koch Nitrogen International Sàrl (KNI”) and collectively with KNC, “Koch”) and El Dorado Chemical Company (“Buyer”).

W I T N E S S E T H : 

WHEREAS, Koch and Buyer are parties to that certain Anhydrous Ammonia Sales Agreement dated March 9, 2005, as amended by that certain First Amendment to Anhydrous Ammonia Sales Agreement effective August 29, 2005 (collectively the “Agreement”), and Koch and Buyer mutually desire to further amend the Agreement as hereinafter provided.

NOW, THEREFORE, in consideration of the mutual covenants and premises herein set forth and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto agree as follows:

1. DEFINED TERMS. Capitalized terms used but not defined herein shall have the meaning given to such terms in the Agreement.

2. TERM. Section II TERM of the Agreement shall be deleted in its entirety and replaced as follows:

“Term The term of this Agreement (the “Term”) shall commence on 12:01 a.m. central time on January 3, 2005 and shall terminate at 11:59 p.m. on December 31, 2008, unless terminated earlier in accordance with this Agreement.”

3. PRICE. Effective upon the Effective Date, subsections B. and C. of Section VI PRICE of the Agreement, shall be deleted in their entirety and replaced as follows:

“B. Adder. The Adder shall be *** per short ton. However if the Ammonia Pipeline Transportation Charge is modified as set forth in Section VI C. of the Agreement, the parties agree to modify the Adder as set forth in Section VI C.”