TY JOUR TI TRANSFORMATION OF THE ORDINARY CHERNOZEM ORGANIC MATTER UNDER THE INFLUENCE OF FERTILIZERS KW organic matter KW transformation KW mineralization KW humification KW vermicompost KW mineral fertilizers KW mobile humus substances JO Bulletin of KSAU AU Ulyanova, O.A. AU Kovalyova, Y.P. PY 2012 IS 0 PB Krasnoyarsk State Agrarian University