... into three types, i.e high polymerization APP, medium polymerization APP and low polymerization APP. The higher polymerization is, the less ... be divided into two type, namely crystalline APP and amorphorous APP. Crystalline APP is a water insoluble and long-chain polyphosphate, ... be used as high nutrient fertilizer. Main Applications:l 100% water solublel APP is a high nutrient of Nitrogen and P, ...