TY JOUR TI Evaluation of biennial sweet clover samples in competitive variety testing and creation of a new variety in the conditions of the forest-steppe of the Middle Volga region KW sweet clover (Melilotus) KW breeding samples KW variety KW competitive variety testing KW productivity KW feed quality JO INTERNATIONAL AGRICULTURAL JOURNAL AU Timoshkin, O.A. AU Timoshkina, O.Y. PY 2024 IS 0 PB Electronic science