TY JOUR TI WHEAT VARIETIES SEEDS STRUCTURAL ELEMENTS DEPENDING ON THE SOWING TIME AND SOWING RATES IN THE TYUMEN REGION NORTHERN FOREST-STEPPE KW spring wheat KW variety KW sowing dates KW seeding rates KW structural elements KW yield JO Bulletin of KSAU AU Yaschenko, S.. AU Loginov, Y.P. AU Kazak, A.A. PY 2022 IS 0 PB Krasnoyarsk State Agrarian University