TY JOUR TI FRACTIONAL AND GROUP COMPOSITION OF HUMUS PODBURS OF SOUTH YAKUTIA KW Aldan Plateau KW mountain taiga KW podburs KW hu- mus formation KW humus composition KW humus type KW humic acids KW fulvic acids KW fractions JO Bulletin of KSAU AU Okoneshnikova, M.V. PY 2018 IS PB Krasnoyarsk State Agrarian University