Growth of ponderosa pine thinned to different stocking levels in central Oregon: 30-year results.

P.H. Cochran; James W. Barrett

doi:10.2737/PNW-RP-508

Treesearch

Growth of ponderosa pine thinned to different stocking levels in central Oregon: 30-year results.

Informally Refereed

Authors:

P.H. Cochran, James W. Barrett

Year:

1999

Type:

Research Paper

Station:

Pacific Northwest Research Station

DOI:

https://doi.org/10.2737/PNW-RP-508

Source:

Res. Pap. PNW-RP-508. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 27 p

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Download (PDF 434 KB): https://research.fs.usda.gov/download/treesearch/2904.pdf

Abstract

Periodic annual increments (PAI) for survivor diameters decreased curvilinearly with increasing stand density. Gross volume and basal areas PAIs increased linearly with increasing stand density. Growth of basal area and volume for the 20 largest trees per acre were reduced curvilinearly with increasing stand density. Bark beetles were the primary cause of mortality. No mortality occurred at the lowest density.

Keywords

Growth, yield, mortality, thinning, pandora moth, mountain pine beetle

Citation

Cochran, P.H.; Barrett, James W. 1999. Growth of ponderosa pine thinned to different stocking levels in central Oregon: 30-year results. Res. Pap. PNW-RP-508. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 27 p