A western larch-engelmann spruce spacing study in eastern Oregon: results after 10 years.

K.W. Seidel

doi:10.2737/PNW-RB-409

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A western larch-engelmann spruce spacing study in eastern Oregon: results after 10 years.

Informally Refereed

Authors:

K.W. Seidel

Year:

1984

Type:

Resource Bulletin

Station:

Pacific Northwest Research Station

DOI:

https://doi.org/10.2737/PNW-RB-409

Source:

Res. Note PNW-RN-409. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 5 p

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Abstract

The 10-year growth response from a spacing study in an even-aged stand of western larch (Larix occidentalis Nutt.) and Engelmann spruce (Picea engelmannii Parry ex Engelm.), thinned at age 10 to 9- and 15-foot spacings, was measured in eastern Oregon. Both basal area and total cubic volume increment per acre increased at the narrower spacing while diameter growth per tree was less than at the wider spacing. Height growth was not affected by spacings. Larch grew about twice as fast as spruce in height and diameter resulting in the development of a stratified two-storied stand.

Keywords

growth response, thinnings (-stand volume), spacing thinnings, thinning effects, western larch, Larix occidentalis, Engelmann spruce, Picea engelmannii, eastern Oregon

Citation

Seidel, K.W. 1984. A western larch-engelmann spruce spacing study in eastern Oregon: results after 10 years. Res. Note PNW-RN-409. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 5 p