Height growth and site index curves for red alder.

Constance A. Harrington; Robert O. Curtis

doi:10.2737/PNW-RP-358

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Height growth and site index curves for red alder.

Informally Refereed

Authors:

Constance A. Harrington, Robert O. Curtis

Year:

1985

Type:

Research Paper

Station:

Pacific Northwest Research Station

DOI:

https://doi.org/10.2737/PNW-RP-358

Source:

Res. Pap. PNW-RP-358. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 14 p

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Abstract

New height growth and site index curves for red alder (Alnus rubra Bong.) were developed from stem analysis data. The analyses use a reference (site index) age of 20 years and are applicable to natural stands between 5 and 50 years of age in western Washington and northwestern Oregon. The new curves are polymorphic and provide a better fit to observed patterns of height growth than the previously available curves. Although differences from previously available curves are not large, the new curves should be an improvement, particularly for use in short-rotation management. Recommendations associated with the new curves for converting breast height age to total age vary with site quality. Relationships between red alder height growth or site index and selected site characteristics are briefly discussed.

Keywords

increment (height), site index, site class, red alder, Alnus rubra

Citation

Harrington, Constance A.; Curtis, Robert O. 1985. Height growth and site index curves for red alder. Res. Pap. PNW-RP-358. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 14 p