Response of Sitka spruce and western hemlock to commercial thinning.

Joseph N. Graham; John F. Bell; Francis R. Herman

doi:10.2737/PNW-RP-334

Treesearch

Response of Sitka spruce and western hemlock to commercial thinning.

Informally Refereed

Authors:

Joseph N. Graham, John F. Bell, Francis R. Herman

Year:

1985

Type:

Research Paper

Station:

Pacific Northwest Research Station

DOI:

https://doi.org/10.2737/PNW-RP-334

Source:

Res. Pap. PNW-RP-334 Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 17 p

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Download (PDF 1.52 MB): https://research.fs.usda.gov/download/treesearch/21473.pdf

Abstract

Light commercial thinning in 100-year-old, well-stocked, mixed stands of western hemlock and Sitka spruce at Cascade Head Experimental Forest produced no consistent growth and yield responses related to thinning intensity. Mortality for all causes except windfall was generally less for thinned stands than for unthinned stands. Losses from windfall appear to be related more to location than to thinning.

Keywords

Commercial thinning, mixed stands, thinning effects, western hemlock, Tsuga heterophylla, Sitka spruce, Picea sitchensis, Oregon (Cascade Head Exp For), Cascade Head Experimental Forest—, Oregon

Citation

Graham, Joseph N.; Bell, John F.; Herman, Francis R. 1985. Response of Sitka spruce and western hemlock to commercial thinning. Res. Pap. PNW-RP-334 Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 17 p