nitrogen phosphorus potassium compost: 1,NPK 2,15-15-15 3,16- ... -18 6,19-19-19 7,20-20-20 nitrogen phosphorus potassium compost:2,15-15-15 3,16-16-16 ... other fertilizer plants in China, our advantages are easy transhipment, low cost and unlimited power for we transport our fertilizer to ...