Ammonium Nitrate - We used ammonium nitrate for the nitrogen it contained in crop production for years with no problems. Most all of the fertilizer warehouses carried it. Then along came Timothy McVey and blew up the Alfred P. Murrah (Federal Building in OKC). Ammonium Nitrate is a very explosive material, you need to be advised that if handled improperly it can be disastrous. I am very much surprised that this has not been pointed out!