TY JOUR TI SEASONAL DYNAMICS OF WATER-SOLUBLE ORGANIC SUBSTANCE OF THE CHERNOZYOM LEACHED IN THE CONDITIONS OF SOIL-PROTECTIVE TECHNOLOGIES KW water-soluble organic substance KW soil-protective technology JO Bulletin of KSAU AU Belousov, A.A. AU Belousova, E.N. PY 2017 IS PB Krasnoyarsk State Agrarian University