Potash Corporation of Saskatchewan (POT) 10-K 2007 FY Annual report

Exhibit 32

Pursuant to section 906 of theSarbanes-Oxley Act of 2002(subsections (a) and (b) of Section 1350, Chapter 63 of Title 18,United States Code), each of the undersigned officers of Potash Corporation of Saskatchewan Inc. (the “Company”), does hereby certify, to such officer’s knowledge, that:

The Annual Report onForm 10-K for the year ended December 31, 2007 (the“Form 10-K”), of the Company fully complies with the requirements of section 13(a) or 15(d) of theSecurities Exchange Act of 1934and information contained in theForm 10-K fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: February 28, 2008

By: /s/ WILLIAM J. DOYLE

William J. Doyle

President and Chief Executive Officer

Date: February 28, 2008

By: /s/ WAYNE R. BROWNLEE

Wayne R. Brownlee

Executive Vice President, Treasurer and

Chief Financial Officer

The foregoing certification is being furnished as an exhibit to theForm 10-K pursuant to Item 601(b)(32) ofRegulation S-K, section 906 of theSarbanes-Oxley Act of 2002(subsections (a) and (b) of Section 1350, Chapter 63 of Title 18,United States Code) and, accordingly, is not being filed as part of theForm 10-K.