TY  JOUR
TI  The regeneration of spruce under the canopy of stand  in Leningrad region
KW  Picea abies
KW  boreal forests
KW  undergrowth
KW  number of undergrowth (spacing)
KW  typology
KW  forest type
KW  crop density
KW  underwood of spruse. 
JO  Actual directions of scientific researches of the XXI century: theory and practice
AU  Grigoreva, O..
AU  Beliaeva, N.V.
AU  Aroyan, K..
PY  2015
IS  3
PB  FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov