TY JOUR TI ESTIMATION OF STREAMSIDE EARTH’S CONDITIONS OF FOREST-STEPPE ZONE OF THE RIVER IRTYSH VALLEY KW Ob-Irtysh floodplain KW mechanical composition of soil KW acidity KW humus KW fertility KW soil horizon KW land reclamation JO Bulletin of KSAU AU Ptukha, M.V. AU Murashko, Y.A. PY 2016 IS PB Krasnoyarsk State Agrarian University