The Mosaic Company (MOS) 8-K Other Events

Exhibit 12.1

The Mosaic Company

Computation of Pro Forma Ratio of Earnings to Fixed Charges

(in millions, except for ratio)

Pro-Forma Basis                

	Three Months Ended August 31, 2011			2011
Earnings:
Earnings from consolidated companies before income taxes	$	729.7		$	3,271.3
Add:
Total fixed charges (per below)		13.0			71.9
Amortization of capitalized interest		2.1			6.0
Distributions from 50% or less owned companies accounted for in accordance with the equity method		3.6			3.2
Less:
Capitalized interest		8.7			34.7
Noncontrolling interest in earnings from consolidated companies with no fixed charges		2.2			0.5
Total Earnings:	$	737.4		$	3,317.1
Fixed Charges:
Interest costs (excluding amortized interest)		0.8			26.0
Capitalized interest		8.8			34.8
Amortized capitalized debt expenses		(0.8	)		1.6
Estimate of interest in rent expense		2.3			9.5
Honored guarantees amount		1.9			—
Total Fixed Charges:		13.0			71.9
RATIO OF EARNINGS TO FIXED CHARGES		56.9	x		46.1	x