In effecting thinnings of even-aged stands, there should be left a suitable number of the best trees, spaced as evenly as possible over the area; thus a definition of the growing stock of the remaining stand is needed, rather than a description of the trees for removal. Although arriving at a decision as to which are the best trees depends upon many factors, a more difficult problem is involved in quantitative determination of a desirable density for the growing stock. Various methods have been applied to this end. After discussing them, the author suggests as a simple practical means that the optimum stand development shown by yield studies should be transferred to graphs which describe the regression of the remaining basal area on the dominant height. Such graphs, made for the most important types of forest, are already in common use in Finland. Estimation of the basal area is made an easy matter by application of the Relascope (angle count) method.
Document Type: Journal Article
Professor of Forest Mensuration and Management, University of Helsinki, Finland
Publication date: October 1, 1963
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