... Ammonium sulfate, (4)24, is an inorganic with a number of commercial uses. The most common use is as a soil fertilizer ... as , and 24% sulfur as . In fertilizer the purpose of the sulfate is to reduce the soil PH .It is ... , lowering the balance of the (as do other sulfate compounds such as ), while contributing essential for plant ... ,4-D (amine), glyphosate, and glufosinate herbicides. Ammonium Sulfate