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    Author(s): James M. Cahill; W.Y. Pong; D.L. Weyermann
    Date: 1987
    Source: Res. Note PNW-RN-457. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 12 p
    Publication Series: Research Note (RN)
    Station: Pacific Northwest Research Station
    PDF: View PDF  (629 KB)

    Description

    A sample of 58 logs was used to evaluate five methods of making scale deduc-tions for pecky rot in incense-cedar (Libocedrus decurrens Torr.) logs. Bias and ac-curacy were computed for three Scribner and two cubic scaling methods. The lumber yield of sound incense-cedar logs, as measured in a product recovery study, was used as the basis for comparison. Results showed that the most biased and least accurate scaling systems deducted the greatest percentage of log volume.

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    Citation

    Cahill, James M.; Pong, W.Y.; Weyermann, D.L. 1987. Pecky rot in incense-cedar: evaluation of five scaling methods. Res. Note PNW-RN-457. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 12 p

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    Keywords

    Log scaling, defect deduction, merchantable volume, pecky rot, lumber recovery, incense-cedar, Libocedrus decurrens

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