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    A model for predicting merchantable and total tree height for 18 species groups in Maine is presented. Only tree-level predictor variables are used, so stand-level attributes, such as age and site quality, are not required. A mixed-effects modeling approach accounts for the correlated within-tree measurements. Data-collection protocols encompass situations in which merchantability to a specified top diameter is not attained due to tree characteristics. The advantage of using the height prediction model over taper-derived estimates of merchantable height is demonstrated.

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    Westfall, James A.; Laustsen, Kenneth M. 2006. A merchantable and total height model for tree species in Maine. Northern Journal of Applied Forestry 23(4):241-249


    Nonlinear mixed-effects model, tree volume, tree taper, tree biomass

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