... NPK 21-0-0 24S. Generally, it is a by-product from chemical (cyanuric acid, capro, acrylonitrile ... NH4)2SO4[.Molecular Weight] 132.14[Property] PH value of 0.1M solution is 5.5, Density is 1 ... fertilizer, can be directly used for a variety of soil and crops, can be used as kinds ... vegetables, and fruit trees, effectually rapid promoting the growth of grain, vegetables, fruits, grass and other plants. It ...