Exhibit 23.1 INDEPENDENT AUDITORS' CONSENT We consent to the incorporation by reference in Registration Statement No. 333-113945 of Potash Corporation of Saskatchewan Inc. on Form S-8 our report dated March 25, 2004 appearing in this PCS U.S. Employees' Savings Plan Annual Report on Form 11-K for the year ended December 31, 2003. /s/ DELOITTE & TOUCHE L.L.P. Chicago, Illinois June [ ], 2003