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From Havlin, Beaton, Tisdale and
Nelson (1999)
Ammonium Sulfate (NH4)2SO4
Ammonium sulfate represents only about 2% of total N fertilizer use in
the United States. The main advantages of (NH4)2SO4
are low hygroscopicity and chemical stability. It is a good source
of both N and S. The strongly acid-forming reaction of (NH4)2SO4 in soil
can be advantageous in high-pH soils and for acid-requiring crops. Its
use can be undesirable in acidic soils already in need of liming. The
main disadvantage of (NH4)2SO4 is its relatively low N content (21% N);
it is generally too expensive to use as a N source. It can, however, be
an economical source of N when transportation costs are low, when it is
a relatively inexpensive by product, and when it is used with crops
requiring S.
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Ammonium
Sulfate 