Fertilizer Price $ = Natural Gas Price $:Natural Gas (NG, NYMEX): Daily Commodity Futures Price Chart: Nov., 2006

Natural Gas (NG, NYMEX): Daily Commodity Futures Price Chart: Nov., 2006
I've heard natural gas price is a large part of the cost of making nitrogen fertilizer. Click the link
I've also been quoted $345 per tonne for 46-0-0 and the quoter (?) said that may be high.