TY JOUR TI ETUDES OF THE USA FODDER AND DIETS QUALITY EVALUATION SYSTEM IN RUSSIA KW forage KW testing system KW quality KW neutral detergent fiber KW acid detergent fiber KW digestibility KW nutritive value JO Adaptive Fodder Production AU Popov, V.V. PY 2021 IS 2021 PB Federal Williams Research Center of Forage Production and Agroecology