Estimating decay in 40- to 90-year-old grand fir stands in the Clearwater region of northern Idaho.

Gregory M. Filip; John W. Schwandt; Susan K. Hagle

doi:10.2737/PNW-RP-421

Treesearch

Estimating decay in 40- to 90-year-old grand fir stands in the Clearwater region of northern Idaho.

Informally Refereed

Authors:

Gregory M. Filip, John W. Schwandt, Susan K. Hagle

Year:

1990

Type:

Research Paper

Station:

Pacific Northwest Research Station

DOI:

https://doi.org/10.2737/PNW-RP-421

Source:

Res. Pap. PNW-RP-421. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 16 p

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Abstract

The fir decay equation for Oregon and Washington was used to predict stem decay in 12 grand fir (Abies grandis (Dougl. ex D. Don) Lindl.) stands in the Clearwater region of northern Idaho. These 12 stands represented a range in geographic and stand characteristic variation. All 12 observed decay percentages were within their associated 95-percent prediction intervals. We therefore concluded that the fir decay equation for Oregon and Washington can be used to estimate stem decay in 40- to 90-year-old grand fir stands in the Clearwater region. Information also is presented on decay biology, hazard-rating techniques, and stand management recommendations.

Keywords

Heartrot, grand fir, decay, hazard rating

Citation

Filip, Gregory M.; Schwandt, John W.; Hagle, Susan K. 1990. Estimating decay in 40- to 90-year-old grand fir stands in the Clearwater region of northern Idaho. Res. Pap. PNW-RP-421. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 16 p