There are two types of phosphate fertilizers. The first type is water-soluble phosphate fertilizer, which is extracted with sulfuric acid. Therefore, when supplying crops, it has both phosphorus and sulfur. From the perspective of the solubility of phosphate fertilizers, water-soluble phosphate fertilizers are mainly calcium sulphate and heavy calcium, which can be used in the north and the south. The second type of phosphate fertilizer is a weak acid-soluble phosphate fertilizer like calcium, magnesium, phosphate, which is mainly used on acidic soils in the south. Therefore, the choice of phosphate fertilizer is based on its solubility, whether it is water-soluble or weak acid-soluble to choose the soil, the second difference between the phosphorus fertilizer contains sulfur and sulfuric acid, or the compound phosphorus fertilizer containing phosphorus diammonium. Phosphate fertilizer bought in Yunnan does not lack sulfur, but sulfur is a medium-quantity element we do not need too much, we supply soil phosphorus is a large number of elements, much more demanding, so in the south, you can use super calcium calcium ammonium phosphate, calcium and magnesium Phosphate fertilizer, then in the north, the other three can, pay attention not to use calcium magnesium phosphate fertilizer.
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