HEAVY METALS CONCENTRATION IN ORGANIC FERTILIZERS
The article present the research of the most common conditions organic fertilizers in Belgorod region: cattle manure, manure runoff, compost. The study invest gated the local agroecological materials and the continuous monitoring of the agrochemical survey of arable soils of Belgorod region. Analysis is results showed that special attention should be paid to the content of toxic elements in animal waste, it was found the highest concentrations of these chemical elements: cadmium - 0,36, lead - 5,86, hydrargyrum - 0,005 mc/kg (in terms of dry substance). The highest average content of arsenic found in the manure of cattle and is 0,55 mc/kg of dry matter. The study showed that despite the increasing volumes of organic fertilizers (8,3 t/ha of sowing in 2014) exceeding the maxi mum permissible concentrations of cadmium, lead, hydrargyrum and arsenic in soils of arable area is not found.