Individual Stem Value Recovery of Modified and Conventional Treelength Systems in the Southeastern United States
Authors
Amanda H. Lang
Forisk Consulting LLC, P.O. Box 5070, Athens, GA 30604
Shawn A. Baker
Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA 30602
W. Dale Greene
Warnell School of Forestry and Natural Resources, University of Georgia, Athens, GA 30602
Glen E. Murphy
Department of Forest Engineering, Oregon State University, Peavy 215, Corvallis, OR 97331
Abstract
We compared value recovery of a modified treelength (MTL) logging system that measures product diameter and length using a Waratah 626 harvester head to that of a treelength (TL) system that estimates dimensions. A field test compared the actual value cut to the maximum potential value suggested by the log bucking optimization program Assessment of Value by Individual Stems (AVIS) for 25 felled trees on each of three sites for two loggers. One half of each site was harvested with a TL crew and the other half with a MTL crew. ANOVA on individual stems using site as a blocking factor showed significant differences between TL and MTL, with TL recovering 80.3% and MTL recovering 73.7% of total value after downgrades.
