TY JOUR TI ESTIMATION OF ECOLOGICAL AND RADIATION STATE OF NORTHERN FOREST-STEPPE SOILS OF KURGAN REGION KW ecological and radiation state of soils KW cesium-137 KW strontium-90 KW accumulation coef-ficient KW gamma background JO Bulletin of KSAU AU Kobyakova, T.I. AU Ufimtseva, L.V. PY 2017 IS PB Krasnoyarsk State Agrarian University