... PK 0-40-4,0-30-15 PK Compound fertilizer of various grades with good quality and best price ... product is a kind of granular solid fertilizer consisting of nitrogen (N), phosphate (P2O5), kalium (K2O) and many medium ... commonly used compound (mixed) fertilizers (proportion of nitrogen, phosphate and kalium): 10-0-10, 12-12-0,0- ... to their needs.Standard: GB15063-2001 Compound PK Fertilizer ,phosphate