http://www.mineweb.com/mineweb/content/en/mineweb-political-econo...

http://www.mineweb.com/mineweb/content/en/mineweb-political-economy?oid=183142&sn=Detail

Very interesting:

"Vale may also try to develop potash mines in Brazil and Canada that it had put on hold to find new sources of the mineral, a source of potassium needed for Brazil's giant agricultural sector.

Brazil, the largest global producer of coffee, orange juice and beef, imports about 90 percent of its potash needs from as far away as Canada, Jordan and Russia. The government had been counting on new supplies from Argentina."