TY JOUR TI VEGETATION AND PEAT DEPOSIT OF FOREST OLIGOTROPHIC BOGS IN THE RIVER SYM BASIN KW forest oligotrophic bog KW type of plant community KW stratigraphy KW peat type KW decomposition degree KW ash content KW peat moisture KW the Sym river JO Bulletin of KSAU AU Karpenko, L.V. PY 2017 IS PB Krasnoyarsk State Agrarian University