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Combining Ring Counting and Ring Width for Estimating Height in Stem Analysis

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This article presents a general conceptual framework for seven methods of estimating the height to a given age by stem analysis, which involves estimates of periodical annual increment in height. To estimate the height, a fraction of the periodical increment in height, which is cumulated in a time fraction of the respective period, is assigned to every hidden tip. Traditional methods of height estimation in stem analysis can be grouped into two broad sets, depending on how the time fraction associated with every hidden tip is determined. By combining time fractions from both groups, two mixed methods were derived and compared with traditional methods to determine the most advantageous method under variations in the crosscut intensity and regularity along the stem and variations in the regularity of current annual increments in total height and stem radius throughout the tree's life. The combined methods were more accurate than traditional methods when sampling schemes that involve long distances between crosscuts are carried out and especially when sampling combines variable distances between crosscuts. If a sample were available, simultaneously combining crosscuts at varying distances taken from trees having varying degrees of irregularities in stem radius and height increments, the combined methods would surpass traditional methods in accuracy.

Keywords: growth rings; hidden tips; periodical annual increment; stem profile evolution

Document Type: Research Article


Publication date: 2013-12-06

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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