TY JOUR TI Lesovodstvennye of the precondition to justification of the scheme of mixture of breeds with participation of a pine Crimean in cultures of the vostochnobayrachny steppe of Ukraine KW echelon-group layout of wood species KW Crimean and Scotch pine KW common oak KW row spacing JO Actual directions of scientific researches of the XXI century: theory and practice AU Levin, S.V. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov