As for the nitrogen fertilizer, the ammonium fertilizer should be used for rice, and the effect is better with ammonium chloride and urea. It is also effective to apply ammonium nitride fertilizer (such as ammonium bicarbonate, ammonium sulfate, ammonium chloride, urea) or nitrate nitrogen fertilizer (such as ammonium nitrate) to cereal crops such as corn and wheat. Potato and sweet potato should also use ammonium nitrogen fertilizer. Ammonium nitrate can improve the quality of tobacco. The ammonium nitrogen helps the combustion of tobacco, while the chlorine-containing fertilizer (such as ammonium chloride) reduces the flammability of tobacco and should be avoided. For acidic soils, chemically alkaline or physiologically alkaline nitrogen fertilizers should be used. In saline-alkaline soil areas, it is not advisable to purchase ammonium chloride containing more chloride ions. In alkaline soil, ammonium nitride is easy to be absorbed and utilized by crops, but care should be taken to prevent decomposition and volatilization.
About phosphate fertilizer, legume crops (soybeans, peanuts), sugar crops (beets, sugar cane), fiber crops (cotton), potato crops (potato, sweet potato), and melons and fruit trees are in high demand. Better fertilizer efficiency. In plots with a large amount of phosphate fertilizer, it is not necessary to apply it year after year to avoid waste.
Regarding potash, tobacco, potato, sweet potato, sugar beet, watermelon, fruit tree, etc. require a large amount of potassium, but these potassium crops are bogey of chlorine, and it is not suitable to apply potassium chloride. Potassium chloride is also not suitable for long-term application on saline-alkali soil. It can be used as base fertilizer and top dressing on non-chlorinated crops, but it is not suitable for seed fertilizer. Potassium sulphate is suitable for various soils and crops, and can be used as base fertilizer, seed fertilizer, top dressing and top dressing.
Regarding sulfur and sodium fertilizers, potatoes, soybeans, peanuts, and rapeseed are also sulfur-loving crops, and the effect of using ordinary calcium is better than that of "heavy calcium." Because "heavy calcium" does not contain calcium sulfate. Beets are good sodium crops, and sodium nitrate is a good fertilizer for sugar beets. Ammonium chloride avoids chlorine crops, but it is suitable for cotton, hemp and other crops, because chlorine can increase the toughness and tension of the fiber.
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