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The dynamics of natural mortality in Norway spruce stands

, : The dynamics of natural mortality in Norway spruce stands. Lesovedenie ( 6): 33-40

Annual observations were made in 1948-87 in stands of Picea abies of the Picetum myrtillosum type in the Leningrad region. The stands were aged 40-80 and 90-130 years, and mortality was analysed by the number of stems, the standing volume, and the cambial area involved, for 5-, 10- and 20-year periods. These data are compared with classical yield table data. The process of natural mortality in spruce stands involves two different groups of stem pests, viz. the more aggressive species (e.g.


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