TY JOUR TI AGRARIAN AND ENVIRONMENTAL MONITORING OF SOILS IN THE CONDITIONS OF THE SOUTHERN FOREST-STEPPE OF OMSK REGION KW monitoring KW heavy metals KW analysis KW reference site KW pollutant KW soil KW horizon KW dynamics JO Bulletin of KSAU AU Matveychik, O.A. AU Bobrenko, I.A. AU Shoykin, O.D. AU Shmidt, A.G. PY 2017 IS PB Krasnoyarsk State Agrarian University