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Ammonium sulfate was one of the first and most widely used nitrogen (N) fertilizers for crop production. Growers apply ammonium sulfate primarily where they need supplemental N and S to meet the nutritional requirement of growing plants. It provides an excellent source of S, which supports or drives numerous essential plant functions, including protein synthesis.
Because the N fraction is present in the ammonium form of ammonium sulfate, rice farmers frequently apply it to flooded soils, since nitrate-based fertilizers are a poor choice due to denitrification losses.
