Timber quality classes from cruise data for lodgepole pine sawn at a board mill in British Columbia
1991
Howard, A.F.
Information on timber quality can play an important role in a wide range of planning activities at sawmills. A system for assessing timber quality does not exist for lodgepole pine (Pinus contorta Dougl.), which is one of the most important commercial species in the interior of British Columbia. A classification system for lodgepole pine timber was developed from cruise data collected according to procedures prescribed by the British Columbia Ministry of Forests. A sawmill lumber yield study was made to obtain the data necessary to test the grading system. Regression analysis, likelihood ratio tests, and analysis of variance were used to test for significant differences in lumber grade yields and log values among six quality classes. The findings indicate that data collected during cruising can be used to separate timber into distinct quality classes. The quality classes showed appreciable variation in average log value when current lumber prices were applied.
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