TY JOUR TI Agronomical efficiency of organomineral fertilizer on chernozem soils of the Middle Urals KW combined fertilizer KW crop KW diatomite KW gypsum KW ammonium sulfate KW phosphorite flour KW bird droppings KW cellulolytic activity of soil KW phenology KW biometrics KW grain quality indices JO Agrarian Bulletin of the AU Karpuhin, M.Y. AU Baykin, Y.L. AU Batyrshina, E.R. PY 2023 IS 233 PB Ural State Agrarian University