TY JOUR TI CHERNOZEMS HUMUS STATE FEATURES DURING FALLOW LAND DEVELOPMENT KW fallow land KW profile structure KW chernozem KW humus KW water-soluble organic matter KW alkali-hydrolyzable organic matter KW carbon dioxide emissions JO Bulletin of KSAU AU Vlasenko, O.A. PY 2024 IS 0 PB Krasnoyarsk State Agrarian University