(1) the nitrogen: nitrogen nutrient elements as the main component of fertilizer, including ammonium bicarbonate, urea, ammonium pin, ammonia, ammonium chloride, ammonium sulfate, etc.
(2) p: p nutrient elements as the main component of fertilizer, including ordinary superphosphate, calcium magnesium phosphate fertilizer, etc.
(3) k: potassium nutrition elements as the main component of fertilizer, the application is not much, the main varieties are potassium chloride, potassium sulphate, potassium nitrate, etc.
(4) compound and mixed fertilizer, the fertilizer contains two of the three elements of fertilizer (nitrogen, phosphorus and potassium) binary compound and mixed fertilizer and containing nitrogen, phosphorus and potassium three elements of the ternary compound and mixed fertilizer. The mixed fertilizer promotion quickly all over the country.
(5) certain elements in trace element fertilizer and fertilizer, such as the former contain boron, zinc, iron, molybdenum, manganese, copper and other trace element fertilizer, the latter such as calcium, magnesium, sulfur fertilizers.
Post time: Mar-25-2022