Npk fertilizer and organic fertilizer work together to provide nutrients to the soil NPK fertilizer has a higher content of nitrogen, phosphorus and potassium. Compared with organic fertilizer, nitrogen, phosphorus and potassium fertilizer has a quick effect. Nitrogen, phosphorus and potassium fertilizers are absolutely essential nutrients in modern agriculture. The future prospects of NPK fertilizer industry are promising. The fertilizer produced by the NPK production line is made from a powdery chemical material containing nitrogen, phosphorus and potassium. Commonly, urea, ammonium chloride, calcium nitrate, and ammonium sulfate can be used as nitrogen sources. More important is phosphorus Monoammonium acid, diammonium phosphate, calcium magnesium phosphate, and triple superphosphate are often used to provide the phosphate element. In addition, the potassium sources of NPK fertilizer include potassium chloride, potassium salt, potassium sulfate and so on. The nitrogen,...