TY CONF TI STUDY AND EVALUATION OF PRODUCTIVITY A NEW BREEDING MATERIAL OF SANDY SAINFOIN IN THE STEPPE CONDITIONS OF THE CENTRAL BLACK EARTH REGION KW sainfoin KW Onobrychis arenaria KW yield KW variety KW green matter KW dry matter KW productivity JO Multifunctional adaptive fodder production 30(78) AU Saprykin, S.V. AU Saprykina, N.V. AU Lyubtseva, O.N. PY 2023 PB Federal Williams Research Center of Forage Production and Agroecology