TY JOUR TI ACCUMULATION OF HEAVY METALS IN THE SOILS OF FOOTHAL AREAS OF KRASNODAR KRAY KW soil KW heavy metals KW meadows KW pastures KW herbage KW safety of livestock feed JO Vestnik of Kazan State Agrarian University AU Zabashta, A.V. AU Zabashta, N.N. PY 2019 IS 14 PB Kazan state agrarian University