TY CONF TI PRODUCTIVITY OF CROP ROTATIONS DEPENDING ON SATURATION WITH WHEAT AND SUNFLOWER ON THE CHESTNUT SOILS OF THE STEPPE KW crop rotation KW precursor KW chestnut soil KW spring wheat KW oats KW sunflower JO «PROBLEMS OF SOIL FERTILITY IN MODERN AGRICULTURE» AU Garkusha, A.A. AU Usenko, V.I. AU Kravchenko, V.I. AU Purgin, D.V. PY 2024 PB Krasnoyarsk Scientific Research Institute of Agriculture is a separate division of the Federal Research Center KSC SB RAS