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Banned

A cheap way to alter ammonium nitrate fertilizer renders it unusable in IEDs.
Mixing iron sulfate, a waste product from steel foundries, with ammonium nitrate fertilizer leads to changes in its chemical composition that keep it from detonating in homemade bombs, say researchers at Sandia National Lab in Albuquerque, New Mexico.
The researchers devised the formula in response to a request from the Department of Defense for ways to combat the use of improvised explosive devices.
Read Here : http://pakagri.blogspot.com/2013/05/fertilizer-that-fizzles-in-homemade.html