TY JOUR TI THE CONTENT OF HEAVY METALS IN THE SOIL COVER, BIRCH LEAVES UNDER THE INFLUENCE OF THE INDUSTRY OF KRASNOYARSK KW environmental pollution KW heavy met-als KW soil KW birch KW maximum concentration limit JO Bulletin of KSAU AU Baikalova, T.V. AU Baikalov, P.C. AU Korotchenko, I.S. PY 2017 IS PB Krasnoyarsk State Agrarian University