TY JOUR TI HUMUS SOILS OF PINE FOREST-STEPPE OF THE ORKHON-SELENGA MIDDLE MOUNTAINS (NORTHERN MONGOLIA) KW mountain forest-steppe KW soil KW hu-mus KW group and fractional structure JO Bulletin of KSAU AU Ayushina, T.A. AU Ubugunova, V.I. AU Ubugunov, V.L. PY 2016 IS PB Krasnoyarsk State Agrarian University