first, unpredictable explosion. one of the main ingrediants timothy mcvey used in the oklahoma city.

if you go into a feed store and ask for "x" amount of ammonium nitrate, the police and possibly the fbi will receive a phone call, and you will be watched and investigated very closely. so be warned. why? well as i said, it is used as an explosive and raises alert to terrorism nowadays, and also, it is a main ingrediant in making "crystal methamphetamine". if i were you, i would not even investigate the idea much further. also, some guys at a rock quarry about 40 miles from me found a bunch of ammonium nitrate. well, they were told to dispose of it properly. well, they had the bright idea of pouring diesel fuel on it and seeing a boom. instead, it was a huge explosion that damaged basement foundations up to 20 miles away. 2 nearby bridges were closed down for a while while engineers assurred they were safe, the fbi investigated. the quarry company went bankrupt i think with all of the insurance claims and lawsuits. just another reason to stay away from the stuff, unless you purchase 1 50 pound bag to quickly green up your lawn. hope this helps. mark