TY JOUR TI ENERGY AND NUTRITIONAL VALUE OF VARIOUS PERENNIAL GRASSES AND THEIR MIXTURES ON SODDY-PODZOLIC SOILS OF THE UPPER VOLGA REGION KW perennial herbs KW grass mixtures KW festulolium KW nutritional and energy value KW milk yield KW soddy-podzolic soil JO Adaptive Fodder Production AU Esedullaev, S.T. PY 2022 IS 2022 PB Federal Williams Research Center of Forage Production and Agroecology