The actual norms of mineral fertilizers under the main crops in advanced farms are determined. The relationship between the main power elements with a significant advantage of nitrogen is established. The expense of mineral fertilizers of fertilizers for the formation of a unit of grain crops is calculated. The concentration of heavy metals in grain mass of main crops depending on the intensity of chemicalization of technological processes is determined.

The analysis of the intensity of contamination by heavy metals of grain products showed that the concentration of lead in winter wheat grains, spring barley and winter wheat rape was 2.1 times higher than MPC, 2.14 and 1.26 times respectively, while in corn and seed grain the concentration of lead was lower than the MPC in 4.16 times and 2.12 times respectively.

The content of lead in the grain mass of the main field crops was 0.24 – 1.26 mg / kg at the limit of the permissible concentration for winter wheat and barley 0.5 mg / kg and the rest of the crops – 1.0 mg / kg. The highest concentration of lead was detected in winter wheat, winter wheat grains and spring barley, and the smallest in corn and sunflower seeds.

The concentration of cadmium in sunflower seeds and winter rape exceeded the MPC by 3.6 and 1.4 times respectively, while in winter wheat and corn and spring barley, 2 and 1.1 times lower MAC. The actual content of cadmium in the grain mass of the cultures underthe investigation was 0.05-0.36 mg / kg with an MPC of 0.1 mg / kg.

The concentration of copper in sunflower seeds was 1.02 times higher than the MPC, and in the grain mass of the remaining crops, the lower MPC, in particular, in the seeds of winter rape, winter wheat grains and spring barley, was 3.41 times, 3.75 and 4 , 24 times respectively, and in maize grain – 13.34 times less than MAC. The actual concentration of copper was 0.75 – 10.2 mg / kg.

The concentration of zinc in the grain of all crops was lower than the MPC – from 2.5 times in the seeds of winter rape – up to 4 times in corn grain. The actual content of zinc in the grain weight of all crops was 12.5 – 20.0 mg / kg. Most zinc was found in winter wheat seeds, and the smallest in maize and barley.As a result of the conducted researches it was established that at growing of winter rape in the farms of the region the highest norms of nitrogen mineral fertilizers are used, that leads to the greatest imbalance between the main elements of nutrition. This causes the highest cost of synthetic fertilizers on the formation of a unit of rape seed and makes the highest pollution of seeds with lead and zinc. High concentration of mineral fertilizers, which is introduced in the farms of Vinnytsya in sunflower, causes the highest concentration in its seeds of cadmium and copper. Despite the high rate of application of mineral fertilizers for corn, the concentration of all heavy metals in its grain is minimal, which is due to high corn yield, lower mineral content per unit of grown products and a long vegetation period.

Key words: mineral fertilizers, norm, grain, pollution, heavy metals.