POWER OF ATTORNEY
Know all by these presents, that I hereby constitute and appoint each of Richard L. Mack, 
Robert J. Pence, Carolyn Brue and Robert A. Kuhns my true and lawful attorney-in-fact and 
agent, each acting alone, with full power of substitution for me and in my name, place and stead, 
to:
1.        execute for me and on my behalf, in my capacity as an officer, director and/or 
10% shareholder of The Mosaic Company, Forms 3, 4 or 5 in accordance with 
Section 16(a) of the Securities Exchange Act or 1934, as amended, and the rules 
promulgated thereunder;
2.        do and perform any all acts for me and on my behalf which may be necessary or 
desirable to complete and execute any such Form 3, 4 or 5, complete and execute 
any amendment or amendments thereto and timely file such Form with the United 
States Securities and Exchange Commission and any stock exchange or similar 
autho
rity; and
3.        take any other action of any type whatsoever in connection with the foregoing 
which, in the opinion of such attorney-in-fact, may be of benefit to me, in my best 
interest or legally required by me, in being understood that the documents 
executed by such attorney-in-fact on my behalf pursuant to this Power of Attorney 
shall be in such form and shall contain such terms and conditions as such 
attorney-in-fact may approve in such attorney-in-fact's discretion.
I hereby grant to each such attorney-in-fact full power and authority to do and perform 
any and every act and thing whatsoever requisite, necessary or proper to be done in the exercise 
of any of the rights and powers herein granted, as fully to all intents and purposes as I might or 
could do if personally present, hereby ratifying and confirming all that such attorney-in-fact, or 
this Power of Attorney and the rights and powers herein granted.  I acknowled
ge that the 
attorneys-in-fact, in serving in such capacity at my request, are not assuming, nor is The 
Mosaic Company assuming, any of my responsibilities to comply with Section 16 of the 
Securities Exchange Act of 1934, as amended.
This Power of Attorney shall remain in full force and effect until I am no longer required 
to file Forms 3, 4 and 5 with respect to my holdings of and transactions in securities of The 
Mosaic Company, unless earlier revoked by me in a signed writing delivered to the attorneys-in-
fact named above.
IN WITNESS WHEREOF, I have signed this Power of Attorney on October 12th, 
2005. 
/s/ Bernard M. Michel        ______________________
Signature
Bernard M. Michel_________________________
Printed Name