(1) Nitrogen Fertilizer: Fertilizers containing nitrogen as the main component, including ammonium bicarbonate, urea, ammonium ammonium, ammonium chloride, ammonium sulfate, and the like.

(2) Phosphorus fertilizer: It is a chemical fertilizer with phosphorus as its main component, including general calcium phosphate, calcium magnesium phosphate fertilizer and so on.

(3) Potassium Fertilizer: Fertilizers containing potassium as the main component are not widely used today. The main varieties include potassium chloride, potassium, and potassium.

(4) Complex and mixed fertilizers: that is, binary compound fertilizers containing three elements (nitrogen, phosphorus, and potassium), compound fertilizers, and ternary compound fertilizers containing three elements of nitrogen, phosphorus, and potassium. Among them, mixed fertilizers are widely promoted throughout the country.

(5) Trace element fertilizers and some medium-element element fertilizers: the former contains fertilizers such as boron, zinc, iron, molybdenum, manganese, and copper, and the latter include fertilizers such as calcium, magnesium, and *.

(6) Fertilizers that are beneficial to certain crops: for example, steel slag silicon fertilizers applied to rice, cobalt fertilizers applied to legumes, and agricultural rare earths applied to sugar cane and fruits.