Estimating breast height diameter and volume from stump diameter for three economically important species in Turkey

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Abstract:

Predicting volume directly from stump dimensions is useful in many situations, such as timber trespass. In the present study, equations for predicting diameter at breast height (dbh) and tree volume from stump diameter outside bark were developed for three economically important tree species in the forest region of Bucak, Turkey. Diameter at breast height was estimated with relatively high accuracy using a simple linear model. Tree volume was estimated with high precision using an exponential equation. Weighted linear and non-linear least squares methods were used to consider heteroscedasticity observed in the volume-stump diameter relationships. The results of a non-linear extra sum of squares method and of the F test indicated that different equations are needed for estimating dbh and tree volume from stump diameter outside bark for different species.

Keywords: Diameter prediction; equivalence testing; non-linear extra sum of squares method; regression analysis; tree volume

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/02827580903280053

Affiliations: 1: Faculty of Forestry, Suleyman Demirel University, Isparta, Turkey 2: Forest Biometrics, Division of Forestry and Natural Resources, West Virginia University, Morgantown, WV, USA 3: Forest Biometrics, Faculty of Forestry and Natural Environment, Aristotle University of Thessaloniki, Thessaloniki, Greece 4: School of Forest Resources, Pennsylvania State University, University Park, PA, USA

Publication date: February 1, 2010

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