Plant forfor proper growth need also phosphorus. There are not sufficient quantities of this element in natural fertilizers. For this reason phosphate fertilizers are extremely important complement in soil treatment. Phosphorus is element needed to many proteins construction. It is assimilated as wate-soluble salts – phosphates. The rapid development of the phosphate fertilizers occured in the second half of 19th century.

Phoshate fertilizers are wide range of products that often contributes the NPK group. The main representative of theese are:
– superphosphates: single, double and triple; there are mixtures of mainly calcium phosphates and sulfates;
– metaphosphates, which molecules are rings created with three of four phosphate anions;
– poliphosphates;
– diphosphate;
– some phosphate meals as bone meal, and others.