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Article: Use of near infrared spectroscopy and multivariate analysis to predict wood density of Douglas-fir from chain saw chips.
- Article from:
- Forest Products Journal
- Article date:
- November 1, 2006
- Author:
CopyrightCOPYRIGHT 2006 Forest Products Society. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Abstract
In many parts of the world, log markets are becoming increasingly competitive and complex. Wood properties, such as stiffness, density, spiral grain, and extractives content, are now being considered by log buyers. Real-time assessment of these properties will be a challenge for log supply managers. The utility of near infrared (NIR) technology for predicting wood density in Douglas-fir stems was examined. Wood disks were collected from 17 sites around Oregon. Each disk was cut with a chain saw, of similar gauge to that used on mechanized harvesters/processors, to provide saw chips. NIR spectra were then obtained for the chip samples. Multivariate ...