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    Author(s): L. H. Reineke
    Date: 1933
    Source: Journal of Agricultural Research
    Publication Series: Scientific Journal (JRNL)
    PDF: Download Publication  (360.0 KB)


    An adequate expression for density of stocking in even-aged forests has long been sought by foresters. Comparison of total basal area of the stand with yield-table values of basal area for the same age and site quality has been the usual method of evaluating stand density. Other methods have been proposed, but none has given results good enough to warrant general adoption or displacement of the basal-area method. It is the purpose of this paper to present a stand-density index which does not require a yield table and which is not affected by possible errors in shape of tho total basal area-age curve. This stand-density index, based on the relationship between number of trees per acre and their average diameter, is premised on the characteristic distribution of tree sizes in even-aged stands.

    It is a well-established fact that in any given stand a curve showing the relative (percentile) frequency of occurrence of the various tree sizes (diameters) has a characteristic form, often approximating that of the "normal frequency curve" or "normal curve of error".

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    Reineke, L. H. 1933. Perfection a stand-density index for even-aged forest. Journal of Agricultural Research. 46: 627-638.

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