TY JOUR TI Evaluation of hybrid apple seedlings according to the main economic and biological characteristics in the Orenburg region KW apple tree KW hybrid seedlings KW natural dwarfs KW winter hardiness KW fruit weight KW productivity JO Agrarian Bulletin of the AU Merezhko, O.E. AU Aminova, E.V. PY 2023 IS 23 PB Ural State Agrarian University