TY JOUR TI The influence of the types of cassettes and containers on the biological productivity of the planting material of the hybrid Populus alba L. Populus tremula L. has been studied. KW hybrid Populus alba L. x Populus tremula L. KW clonal micropropagation KW in vitro KW closed root system KW greenhouse KW hardening site KW planting material KW cassettes KW containers JO Forestry Engineering Journal AU Evlakov, P.M. AU Popova, A.A. AU Ryazanceva, O.S. AU Tseplyaev, A.N. PY 2025 IS 15 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov