Bumper

inorganic compound NPK fertilizer or custom-made NPK compound fertilizer) /
Organic compound fertilizer of granular , strip, amino acid granular /
Chemical fertilizer such as Ammonium phosphate dibasic , Nitric acid calcium,
Ammonium nitrate, Potassium nitrate, Potassium chloride, Sulfur,
Calcium superphosphate, Calcium magnesium phosphate?tc)