Agrarian and environmental monitoring of soils in the conditions of the southern forest-steppe of Omsk region

On the basis of agroenvironmental monitoring in the conditions of the southern forest-steppe of JV ‘Yuryevskoye’, Kormilovsky area of Omsk Region field and laboratory researches in the definition of ecological and toxicological condition of lands of the farm on change of the content of heavy metals in arable horizon of soils of reference sites of ex-perimental fields were made. The period of re-searches made 10 years - from 2007 to 2016. The observations were made according to annual local monitoring of soils on the reference sites put on lands of agricultural purpose in all agroclimatic zones of Omsk Region. In the study topical issues connected with the content of heavy metals in snow water of reference sites, gross and mobile forms of heavy metals in arable layer of the soils of experi-mental fields are revealed. All main sources of in-take of heavy metals in the studied zone are re-vealed. It is defined that the receipt of pollutants are heavy metals in the form of rainfall slightly and corresponds to all standard indicators of safety. The maintenance of gross forms of heavy metals does not exceed maximum permissible concentra-tion, except for nickel and chrome. The indicators of gross forms of nickel and chrome slightly exceed maximum concentration limit, degree of danger of pollution of soils is absent as the most important mobile forms of heavy metals have low content. The dynamics of change of the content of mercury and arsenic for the 10-year period of supervision in the southern subband of the forest-steppe of Omsk Region showing favorable situation concerning the-se indicators is given.