TY JOUR TI NUTRITIVE VALUE OF ANNUAL CEREAL-LEGUME GRASS MIXTURES IN THE STEPPE ZONE OF NORTHERN KAZAKHSTAN KW oats KW barley KW vetch KW peas KW sudan grass KW millet KW grass mixture KW crude protein KW crude fiber KW crude ash KW crude fat KW phytocenotic breeding JO Vestnik of Omsk SAU AU OSTROVSKY, V.A. AU FILLIPOVA, N.I. AU FILIPPOVA, N.I. PY 2024 IS 53 PB FSBEI HE Omsk SAU