... 3.high-effeciency fertilizer,suitable for common soil Granular Ammonium Sulphate Fertilizer N 20.5% 1,Ammonium sulphate, high grade.2, ... One of the economic N fertilizer for different crops, easy ... season.4,Min Nitrogen content 20.5% .5,Free of chloride, safe to most crops especially cash crops. Granular Ammonium Sulphate Fertilizer N 20.5%