TY CONF TI CHANGES IN SOIL PROPERTIES DURING LONG-TERM NON-USE OF ARABLE LAND KW unused arable land KW chernozem KW organic matter KW exchangeable bases KW farming systems JO «PROBLEMS OF SOIL FERTILITY IN MODERN AGRICULTURE» AU Dobrotvorskaya, N.I. AU Nikkar', K.A. AU Del'cova, K.A. AU Caryuk, G.V. PY 2024 PB Krasnoyarsk Scientific Research Institute of Agriculture is a separate division of the Federal Research Center KSC SB RAS