[mamelukesabre]

I don’t understand why the potash corp of saskatchewan would have food price exposure.

[southernnorthcarolina]

I don’t understand why the potash corp of saskatchewan would have food price exposure.

It's fertilizer, the bet being that rising prices will cause farmers to try to maximize their crop yield per acre, and/or to cultivate additional land.

[stiguy]

Potash is the primary source for potassium, a key ingredient in fertilizer.

See: http://en.wikipedia.org/wiki/Potash