TY JOUR TI Long-term experiment on the effect of thinnings in the upland artificial stands of quercus robur in the southern forest-steppe KW Quercus robur KW thinning KW artificial forest stand KW stand development KW southern forest-steppe KW water deficit KW insect damage of leaves JO Forestry Engineering Journal AU Istomina, Y.G. AU Kaplina, N.F. PY 2017 IS 7 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov