How to use chemical fertilizers correctly?

Chemical fertilizers refer to fertilizers made by chemical methods or mining of ores, also known as inorganic fertilizers, including nitrogen fertilizers, phosphorus fertilizers, potassium fertilizers, micro fertilizers, composite fertilizers, etc. They have the characteristics of simple composition, high nutrient content, fast fertilizer efficiency, and strong fertilizer strength. Generally, it does not contain organic matter and has no effect on improving soil fertility. The main raw materials for producing fertilizers are oil, coal, and natural gas.
Reasonable use of fertilizers can increase crop yield, while excessive use of fertilizers can lead to a decrease in agricultural product quality and environmental pollution. Therefore, it is necessary to use fertilizers correctly and reasonably. For example, Ammonium bicarbonate should be applied deeply, and it is not suitable to water immediately after urea application. Ammonium sulfate should not be used for a long time. Nitrate nitrogen fertilizer should not be applied in paddy fields and vegetable fields. Chlorinated fertilizer should not be applied to Alkali soil and chlorine resistant crops. Phosphate fertilizer should not be applied dispersedly, and potassium fertilizer should not be applied in the late growth stage of crops.