The article presents the results of obtaining hydrogels based on polyacrylonitrile, with potassium-phosphorus fertilizers in the composition used as agricultural fertilizers. As a potassium-phosphate fertilizer used fertilizerpotassium dehydrogenase orthophosphate. Comparative analysis was carried out using the obtained hydrogel cultures of wheat, safflower and barley. It is established that the polymer hydrogel containing potassium and phosphorus increases the moisture content of the soil, improves its water-retaining properties, improves the process of air exchange, increases the water-resistance of soil aggregates, and increases the productivity of plants while reducing the amount of polymer hydrogel per hectare. In this work, it was obtained a hydrogel containing potassium, magnesium and phosphorus impregnated by mixing with the addition of the same amount of the hydrogel, with the addition of soluble caliciviridae and magnetohydrostatic. In the drying Cabinet, increased twice the volume obtained, dried for two hours at a temperature of 90-95 0 C. Several samples containing potassium, magnesium and phosphorus were sampled for plants.