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6.6 Predicting Log Yield
Authors: A D GordonPublication: NZIF Forestry Handbook, Volume Section 6 – Data collection and projection, pp 6, Dec 2023
Publisher: New Zealand Institute of Forestry
Abstract: The potential yield of logs from a stand is vital information to the forest manager. To provide this information, preharvest assessments must not only estimate the total stand volume, but also the mix of log products the stand could yield. The key requirement of a pre-harvest assessment system is to be able to provide this information for any set of log product specifications. To do this it is necessary to work back from the log product specifications to ensure that those log quality characteristics (on which the specifications are based), are recorded for the standing stems. Logs are specified in terms of both external features, such as their dimensions, straightness, and branching, and internal features, such as the effectiveness of pruning, wood density and pith symmetry. This article describes external features.