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The Relascope in the Determination of Thinning Needs

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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

Affiliations: Professor of Forest Mensuration and Management, University of Helsinki, Finland

Publication date: October 1, 1963

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  • The Journal of Forestry is the most widely circulated scholarly forestry journal in the world. In print since 1902, the Journal has received several national awards for excellence. The mission of the Journal of Forestry is to advance the profession of forestry by keeping forest management professionals informed about significant developments and ideas in the many facets of forestry: economics, education and communication, entomology and pathology, fire, forest ecology, geospatial technologies, history, international forestry, measurements, policy, recreation, silviculture, social sciences, soils and hydrology, urban and community forestry, utilization and engineering, and wildlife management. The Journal is published bimonthly: January, March, May, July, September, and November.

    2015 Impact Factor: 1.476
    Ranking: 22 of 66 in forestry

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