Buyer: Fertilizers such as urea, np, np+so3, npk, npk+so3, dap, ammonium sulphate, tsp, potassium nitrate, potassium sulphate, mono potassium phosphate, iron sulphate, calcium nitrate, calcium sulphate, magnesium sulphate, magnesium nitrate, boric acid, zinc sulphate, copper sulphate, biurea