What is calcium magnesium phosphate fertilizer?

What is calcium magnesium phosphate fertilizer? What nutrients does calcium magnesium phosphate fertilizer contain? Please also know the netizens to help introduce calcium magnesium phosphate fertilizer is a more common variety of fertilizer, but what is calcium magnesium phosphate fertilizer? There are still a lot of farmers do not understand; so the farming network collated the data of calcium magnesium phosphate fertilizer, the following detailed list for netizens' reference. What is calcium magnesium phosphate fertilizer: calcium magnesium phosphate fertilizer is made from phosphate rock and an appropriate amount of magnesium-containing silicon ore melted at high temperature, made of glassy particles after water quenching, and then milled into fine powder, so it is also called molten magnesium phosphate fertilizer, referred to as molten phosphate fertilizer, is one of the main varieties of phosphate fertilizer in China. The main components of calcium magnesium phosphate fertilizer are high temperature tricalcium phosphate and calcium orthosilicate. Calcium magnesium phosphate fertilizer not only provides low concentration of phosphorus, but also provides a large amount of silicon, calcium and magnesium. The ingredients of calcium magnesium phosphate fertilizer: general calcium magnesium phosphate fertilizer contains available phosphorus 12% 20%, calcium oxide 25% 30%, iron oxide 15% 18%, magnesium oxide 10% 15%, silicon dioxide 25% 40%. And calcium magnesium phosphate fertilizer also contains a small amount of aluminum, manganese and other salts. The characteristics of calcium magnesium phosphate fertilizer: calcium magnesium phosphate fertilizer is insoluble in water, but soluble in 2% citric acid solution, belonging to wolfberry soluble phosphate fertilizer, insoluble in water, alkaline, available phosphorus is not leached, non-corrosive, non-moisture absorption, no caking. The phosphate contained in calcium magnesium phosphate fertilizer must be dissolved before it can be absorbed and utilized by crops, and its solubility is greatly affected by soil PH value. After the application of calcium magnesium phosphate fertilizer in acidic soil, it is helpful to gradually dissolve and release phosphate in fertilizer for absorption and utilization of crops. at present, calcium magnesium phosphate fertilizer can neutralize part of soil acidity in the process of transformation to improve the availability of phosphorus in soil and fertilizer. The application of calcium magnesium phosphate fertilizer to neutral and calcareous soil can also gradually dissolve and release phosphoric acid under the action of soil microorganisms and crop root exudates, but the release rate of calcium magnesium phosphate fertilizer is slower than that of acidic soil, and the fertilizer effect is relatively long. What are the common methods of making potash from plant ash?