TY JOUR TI DIFFERENT PRECOCITY CORN HYBRIDS REACTION TO SOWING TIME IN THE MIDDLE URALS KW corn KW sowing time KW grain productivity KW energy value KW starch KW grain share KW grain moisture JO Bulletin of KSAU AU Ovchinnikov, P.Y. PY 2023 IS 0 PB Krasnoyarsk State Agrarian University