TY JOUR TI Effectiveness of growth regulators when cultivating barley KW barley KW growth regulator KW lignohumate KW zerebra agro KW efficiency JO Vestnik of Omsk SAU AU Bobrenko, I.A. AU Boldysheva, E.P. AU Kormin, V.P. AU Prostynyuk, T.V. PY 2026 IS 62 PB FSBEI HE Omsk SAU