How to choose suitable fertilizer products?

The right fertilizer should be selected according to the characteristics of soil, crops and growth period. For example, vegetables, fruit trees and cash crops must all apply organic fertilizer, and field crops should apply organic fertilizer as far as possible, which should be prepared in advance because organic fertilizer needs to mature; phosphorus and potassium fertilizer is mainly used as base fertilizer for field crops and for fruit trees and vegetables. not only as base fertilizer but also as topdressing. Among them, the acid soil in the south can give priority to phosphate fertilizers such as cheap calcium superphosphate or calcium magnesium phosphate fertilizer containing calcium magnesium sulfur, while the calcareous soil in the north should choose quick-acting phosphate fertilizer or phosphate fertilizer with higher nutrient concentration such as diammonium phosphate. The selection of potash fertilizer mainly depends on the chlorine tolerance of crops. Sugar beet, spinach, rice, wheat and corn are not sensitive to chlorine, and potassium chloride with low price and high nutrient content can be preferred. Potassium sulfate should be chosen for taboo crops such as tobacco, potatoes, berries and saline-alkali soil. The selection of potash fertilizer also depends on the local Rain Water or irrigation conditions. in rainy or irrigated places, appropriate amount of potassium chloride can be applied in base fertilizer, and potassium sulfate should be selected in dry and rainy, salinized places or vegetable greenhouses.