TY CONF TI COMPARATIVE ASSESSMENT OF SPRUCE CROPS WITH CLOSED AND OPEN ROOT SYSTEMS IN TOTEM FORESTRY VOLOGDA REGION KW types of forests KW spruce crops with closed and open root systems KW survival KW preservation KW growth JO BIOLOGICAL AND FORESTRY AND ENVIRONMENTAL FUNDAMENTALS OF SUSTAINABILITY OF NATURAL AND ARTIFICIAL PHYTOCENOSES AU Shevelev, A.M. AU Sivolapov, A.I. PY 2025 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov