April 26, 2013
Federal investigators haven't determined the cause of a horrific fire and explosion at a Texas fertilizer plant last week, but the main suspect is a potentially explosive, loosely regulated fertilizer that is seen less and less in farms across the USA.
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Ammonium nitrate is still used in areas like Central Texas that have alkaline soils, because it works better, says Theo Udeigwe, a professor of soil chemistry at Texas Tech University in Lubbock.