17 April 2008

Peak potash?

Modern intensive commercial agriculture requires, in addition to lots of cheap energy, lots of cheap fertilizer to replace nutrients lost through the crops and through erosion. I have been hearing rumours of concern over global potash sources for some time and this deal between China and Canada, with China paying well over the odds, makes me wonder if there isn't something serious to worry about here; as if we needed new and serious things to worry about.

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