TY JOUR TI OPTIMIZATION OF TIMING OF HERBICIDE TREATMENT OF EMMER CROPS IN THE SOUTHERN FOREST-STEPPE OF THE OMSK OBLASTI KW emmer KW period of herbicide treatment KW proportion of weeds in the agrophytocenosis KW grain yield JO Vestnik of Omsk SAU AU TOPEKHA, R.V. AU RENDOV, N.A. PY 2024 IS 54 PB FSBEI HE Omsk SAU