TY JOUR TI IMPACT OF OIL POLLUTION ON TOXICITY LEVEL OF PEAT SOILS KW oil KW peat soils KW toxicity KW a norm of permissible residual oil content in the soil. JO Vestnik of Kazan State Agrarian University AU Lednev , A.. AU Skvortsova, I.. PY 2015 IS 10 PB Kazan state agrarian University