TY CONF TI THE MAIN ASPECTS OF PRODUCTION OF BEEF ON THE BASIS OF THE DIFFERENTIAL IMPACT OF THE ACTIVE SUBSTANCES KW JO Proceedings of The international scientific and practical conference AU Nikulin, V.N. AU Mustafin, R.Z. AU Korsikov, S.S. AU Tupikov, M.S. PY 2024 PB Ural State Agrarian University