TY JOUR TI THE CHANGES IN HUMUS STATE OF THE FARM SOILS OF KRASNOYARSK REGION UNDER THE ACTIVITY OF THE VERMIKOMPOST KW humus condition of the soil KW agrogrey soil KW common chernozyom KW vermicompost KW organic waste KW earth worms KW enzymatic activity JO Bulletin of KSAU AU Senkevich, O.V. PY 2017 IS PB Krasnoyarsk State Agrarian University