Potash Corporation of Saskatchewan (POT) 10-Q 2006 Q2 Quarterly report

Exhibit 11

POTASH CORPORATION OF SASKATCHEWAN INC.
COMPUTATION OF PER SHARE EARNINGS
FOR THE SIX MONTHS ENDED JUNE 30

			2006			2005
A	Net income as reported, Canadian GAAP ($ millions)		$	300.6		$	295.5
B	Items adjusting net income ($ millions)		$	13.3		$	(8.8	)
C	Net income, US GAAP ($ millions)		$	313.9		$	286.7
D	Weighted average number of shares outstanding	103,718,000			110,365,000
E	Net additional shares issuable for diluted earnings per share calculation			2,161,000			3,041,000
	CANADIAN GAAP
	Basic earnings per share (A/D)		$	2.90		$	2.68
	Diluted earnings per share (A/(D+E))		$	2.84		$	2.61
	UNITED STATES GAAP
	Basic earnings per share (C/D)		$	3.03		$	2.60
	Diluted earnings per share (C/(D+E))		$	2.96		$	2.53