How to Choose Fertilizers According to The Characteristics of Crops and Soil Properties

(1) Nitrogen fertilizer: ammonium nitrogen fertilizer should be used for rice, especially ammonium chloride and urea. It is also effective to apply ammonium nitrogen fertilizers (such as ammonium bicarbonate, ammonium sulfate, ammonium chloride, urea) or nitrate nitrogen fertilizers (such as ammonium nitrate) to cereal crops such as corn and wheat. Potatoes and sweet potatoes should also use ammonium nitrogen fertilizer. Ammonium nitrate can improve the quality of tobacco, and the ammonium nitrogen in it can help the combustion of tobacco. Chlorine-containing fertilizers (such as ammonium chloride) reduce the flammability of tobacco and should be avoided. For acidic soils, chemical alkaline or physiological alkaline nitrogen fertilizers should be used. In saline-alkali land areas, it is not appropriate to purchase and apply ammonium chloride containing more chloride ions. In alkaline soil, although ammonium nitrogen fertilizer is easily absorbed and utilized by crops, attention should be paid to prevent the decomposition and volatilization of ammonium nitrogen.

(2) Phosphorus fertilizer: legume crops (soybeans, peanuts), sugar crops (beets, sugarcane), fiber crops (cotton), tuber crops (potatoes, sweet potatoes), melons, and fruit trees require more phosphorus, so increase the application of phosphorus fertilizers Have better fertilizer effect. In the plots with a large amount of phosphate fertilizer, it is not necessary to apply phosphate fertilizer year after year. so as not to waste.

(3) Potassium fertilizer: Tobacco, potato, sweet potato, sugar beet, watermelon, fruit trees, etc. all require a large amount of potassium, but these potassium-loving crops all avoid chlorine, and potassium chloride should not be used. Potassium chloride is also not suitable for long-term application on saline-alkali land. It can be used as base fertilizer and top-dressing fertilizer on non-chlorine-avoiding crops, but it is not suitable for seed fertilizer. Potassium sulfate is suitable for various soils and crops, and can be used as base fertilizer, seed fertilizer, top dressing and top dressing outside the root.

(4) Sulfur and sodium fertilizers: Potatoes, soybeans, peanuts, and rapeseed are also sulfur-loving crops, and the effect of using ordinary calcium is better than "heavy calcium". Because "heavy calcium" does not contain calcium sulfate. Sugar beets are a sodium-loving crop, and sodium nitrate is a good fertilizer for sugar beets. Ammonium chloride is forbidden for chlorine crops, but it is suitable for cotton, hemp and other crops, because chlorine can increase the toughness and tensile strength of fibers.