npk fertilizer 1. N+P2O5+K2O 2. NO3-N easily absorbed by crops 3. 100% water soluble 4. match various period of plant-grow npk fertilizer : N+P2O5+K2O 15-15-1520-20-20, 19-19-19+TE, 16-16-16, 17-17-17 18-18-18, 12-12-17+MgO, 20-10-12+2MgO.30-10-10,22-5-19+TE,31-11-11, 23-6-1025-5-10 , 25-7-7+2MgO, 20-10-10+2Zn10-55-10, 12-38-10, 12-48-8, 10-52-1018-30-15, 10-40-10, 12-36-1210-10-40, 11-5-40, 15- ...