TY JOUR TI DYNAMICS OF THE HEAVY METAL Pb, Cd, Zn, Cu CONTENT IN THE GRASS COVER OF THE FARM NATURAL PASTURES IN THE SHUSHENSKIY AND MINUSINSKIY DISTRICTS OF KRASNOYARSK TERRITORY KW natural pastures KW heavy metals JO Bulletin of KSAU AU Kriger, A.A. AU Milovanov, O.V. AU Kriger, N.V. PY 2013 IS PB Krasnoyarsk State Agrarian University