TY JOUR TI PROPAGATING BLACKBERRY BLACK GEM BY ROOT CUTTINGS KW blackberry KW reproduction KW root cuttings KW planting material KW Kornevin KW Ecofus JO Bulletin of KSAU AU Ladyzhenskaya, O.V. AU Simahin, M.V. AU Kryuchkova, V.A. PY 2023 IS 0 PB Krasnoyarsk State Agrarian University