Morphostructure and root density of the rhizosphere of Siberian spruce plantations and secondary broadleaved stands in the Middle Urals as characteristics of their competitive relationships,
On three sample plots in 30-year-old Picea obovata L. plantations established on the cutting area, stand morphological struc-ture, root biomass and extension of spruce and small-leaved (birch, aspen and willow) trees of the secondary upper canopy re-generated on the clear felled area are studied after two thinning stages of small-leaved and spruce trees.