TY JOUR TI Production efficiency of cultivation of plum varieties under arid conditions of the Astrakhan region KW plum KW phenology KW variety KW flowering KW fruiting KW yield KW fruit weight JO Agrarian Bulletin of the AU Solonkin, A.V. AU Zvolinskiy, V.P. AU Aleksandrova, T.I. PY 2021 IS 205 PB Ural State Agrarian University