It is mineral salt fertilizer that is made of physical or chemical industry and contains phosphorus, potassium, calcium, magnesium, sulfur and other nutrients. Including mineral potash and potassium sulfate; mineral phosphate fertilizer (phosphate rock powder, calcined phosphate, calcium magnesium phosphate fertilizer, defluorinated phosphate fertilizer); and limestone, limited to use in acidic soils; powdered sulphur fertilizer, used in alkaline soils. Such as active calcium fertilizer, is the sea shell sedimentary rock, the main component is calcium carbonate and magnesium carbonate. If crushed and ground directly with fruit and vegetables, calcium and magnesium effect is very good. If it is applied after calcination, it also has dual effects of calcium magnesium supplementation and insecticidal sterilization. 1Single inorganic fertilizers: nitrogen fertilizers such as ammonium bicarbonate, ammonium sulfate, ammonium chloride, urea; phosphorus fertilizers such as superphosphate and heavy superphosphate; potassium fertilizers such as potassium chloride and potassium sulfate; calcium sulfate, and carbonic acid Calcium, magnesium oxide, sulfur and other calcium and magnesium sulfur fertilizers; zinc sulfate, copper sulfate, ferrous sulfate, manganese sulfate, ammonium molybdate, borax and other trace element fertilizers. 2 compound (mixed) fertilizer: monoammonium phosphate, diammonium phosphate, potassium dihydrogen phosphate, nitrogen phosphorus potassium compound fertilizer, formula BB fertilizer and so on. Manual Coal Steam Boiler,Industrial Horizontal Coal Boiler,4 Ton Coal Fired Steam Boiler,Dzh Series Steam Boiler Henan Yuanda Boiler Co., Ltd. , https://www.industrysteamboiler.com