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Volume table
A Volume table is a chart to aid in the estimation of standing timber volume. These tables are based on volume equations and use correlations between certain aspects of a tree to estimate the volume to a degree of certainty. The DBH (Diameter at Breast Height) and the merchantable height are used to determine the total volume. Difficulties occur when estimating the form class of the tree in question. The Mesavage and Girard form classes used to classify the trees to decide which volume table should be used. These volume tables are also based on different log rules such a Scribner, Doyle, and International ¼” scale. In order to be effective, the proper form class must be selected as well as accurate DBH and height measurements.
== History ==
In 1804, Heinrich Cotta suggested the idea of a volume table.〔Clark, J.F. 1902. Volume Tables and the bases on which they may be built. Forestry Quarterly. 1:6-11〕 However, it was not carried out until 1846 when the Bavarian Government conducted an extensive study which was used to find the volume of entire stands rather than single trees. From this, variations grew based on variables including growth rate, species, and site index.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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