TY CONF TI THE MAIN STAGES AND RESULTS OF THE DEVELOPMENT OF VIRGIN AND FALLOW LANDS OF THE SOUTHERN URALS KW virgin land KW fallow lands KW development KW grain production KW technology KW economy JO «PROBLEMS OF SOIL FERTILITY IN MODERN AGRICULTURE» AU Ageev, A.A. AU Anisimov, Y.B. AU Vrazhnov, A.V. AU Kalyuzhina, E.L. AU Moshkina, Y.S. PY 2024 PB Krasnoyarsk Scientific Research Institute of Agriculture is a separate division of the Federal Research Center KSC SB RAS