Superphosphate is a fertilizer, the application of which is necessary!

Almost every gardener or gardener knows what superphosphate is. Fertilizer (its use is widespread almost everywhere) is a substance that contains about twenty-six percent of phosphorus, soluble in water. In addition, magnesium (less than a percent), about 17% of calcium, 10% of sulfur and about six percent of nitrogen is part of simple superphosphate. Part of the phosphorus in the fertilizer is free phosphoric acid (about 2.5%). The proportion of water in the material is two percent. The predominant size of granules in quality material should be about six millimeters, 1-4 mm inclusions are allowed.

In what other form does superphosphate exist? Fertilizer, the use of both varieties which can significantly improve the yield, is also produced in the form of double superphosphate. He differs from the ordinary in the production process. A double variety is extracted from natural phosphates through electric pre-heating and further oxidation of phosphorus (H ₃ PO _{4 is formed} ), while conventional grades are obtained by acid decomposition.

What is the difference between double and normal superphosphate (fertilizer)? The use of double-variant soils in low-fertility soils gives positive results, since it contains up to 86% of useful substances, including easily digestible phosphates - 52%, potassium - 34%, small amounts of chlorine and other substances. In its appearance, this superphosphate is a substance of various shades of gray, which must be stored in closed warehouses with protection from access to precipitation and groundwater, since it absorbs water well. For users, the material is non-toxic, in addition, it does not burn and is explosion-proof.

How is superphosphate (fertilizer) used? The general plan guideline recommends first to study the composition of the soil on the land. If its reaction is neutral or alkaline, then the benefits of using these substances will be maximum. In the case of acidic soils, this fertilizer must be mixed with limestone or humus to prevent the conversion of superphosphate to non-digestible aluminum or iron phosphate.

When should superphosphate (fertilizer) be introduced? Its use is allowed when sowing seeds of cucumber, corn, tomatoes, beets, etc. into the holes. In addition, you can make from 40 to 60 grams of fertilizer per square meter. Meter for prikormki garden trees, from 15 to 20 grams per square. Meter for fertilizing plants in dry form and up to 50 grams per square meter. Meter when digging a plot of land for the winter.

Superphosphate is a fertilizer, the price for which today is about 15,000 rubles per ton. It allows you to increase the yield, improve the taste qualities of fruits, positively affect the reduction of oxidative processes in plants, strengthen the root system. Its lack, for example, in potatoes promotes the formation of rusty spots in tubers, in tomatoes - leads to small fruits and spotted leaves. The red currant reacts to the lack of fertilizers with the increased acidity of berries, and raspberry does not develop shoots.