TY CONF TI Analysis of the source material of variable alfalfa in various ecotopes of the Central Chernozem region KW ecological breeding KW feed productivity KW seed productivity KW mf mutation KW polycross method KW dispersion analysis KW the share of influence of factors JO Multifunctional adaptive fodder production AU Borodaeva, Z.A. PY 2022 PB Federal Williams Research Center of Forage Production and Agroecology