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Form Class and Its Use in Estimating Sawtimber Volume of Sugar Maple Trees

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The Mesavage-Girard form class for a composite of 242 sugar maple sawtimber trees in New York averaged 82 (±5.3), differing significantly from the regional average form class of 79 originally recommended in the Mesavage-Girard form class volume tables. Also, for 8 of 16 stands, the measured form class differed significantly from the recommended regional average. Findings suggest a need to estimate form class for each tree when making an inventory of sawtimber volume. A regression analysis using data from the 242 sample trees provided a prediction equation for estimating diameter inside bark at 17 ft height on the basis of dbh. That allows determination of a unique Mesavage-Girard form class for each diameter class of sugar maple trees and use of that diameter class average when computing the board-foot volume of standing trees.
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Keywords: form class; sawtimber volume; sugar maple

Document Type: Research Article

Publication date: 2010-06-01

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  • Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Northern Journal of Applied Forestry covers northeastern, midwestern, and boreal forests in the United States and Canada.
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