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In acidic soils, soluble phosphorus easily combines with iron and aluminum to form iron phosphate and aluminum phosphate, which reduces effectiveness. Exchangeable potassium, calcium, magnesium, etc. in the soil are easily replaced by hydrogen ions and will be lost as soon as rain is encountered. Acidic soils also often lack sulfur and molybdenum. Therefore, alkaline or physiological alkaline fertilizers such as calcium nitrate, ammonia, ammonium bicarbonate, calcium magnesium phosphate, etc. must be used on acidic soils.
In alkaline soils, especially calcareous soils, soluble phosphorus is easily combined with calcium to form insoluble calcium phosphate salts, which will reduce the availability of phosphorus and the effectiveness of many trace elements such as boron, manganese, molybdenum, zinc, and iron. It will also be greatly reduced, resulting in the crops often feel that these nutrients are insufficient, and various physiological diseases occur. Therefore, acidic and physiological acid fertilizers such as calcium superphosphate, ammonium sulfate, and ammonium chloride should be applied to calcareous or alkaline soils to increase the acidity of the soil, so that phosphorus is not easily combined with calcium to form insoluble calcium phosphate salts, which reduces The availability of phosphorus can also increase the effectiveness of boron, manganese, molybdenum, zinc, iron, and copper. On the contrary, it will cause secondary salinization, structural deterioration and fertility degradation of the soil.
Best Regards
JRT Team
Many farmers buy chemical fertilizers and apply chemical fertilizers. They basically do not consider the acidity and alkalinity of cultivated soil, and do not consider the acidity and alkalinity of chemical fertilizers. They only consider the nutrient content of chemical fertilizers and the ratio of N, P, K, which results in poor fertilization. In fact, mastering the acidity and alkalinity of fertilizers is very helpful for rational fertilization.