TY JOUR TI THE ASSESSMENT OF ARABLE SOIL FERTILITY ON THE CONTENT OF ORGANIC SUBSTANCE AND NITRATE NITROGEN IN THE KRASNOYARSK TERRITORY CONDITIONS KW soil KW pure fallow KW humus KW mobile humus substances KW easily decomposed organic substance KW nitrate nitrogen KW plucking degree JO Bulletin of KSAU AU Kartavykh, V.V. AU Shpedt, A.A. PY 2014 IS PB Krasnoyarsk State Agrarian University