Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): K.W. Seidel
    Date: 1985
    Source: USDA Forest Service PNW Research Note No. 429: 8 p
    Publication Series: Research Note (RN)
    Station: Pacific Northwest Research Station
    PDF: Download Publication  (620 KB)


    The 10-year growth response from an initial spacing study established in a ponderosa pine (Pinus ponderosa Dougl, ex Laws.) and grand fir (Abies grandis (Dougl. ex D. Don) Lindl.) plantation was measured in central Oregon. The study was designed to compare the growth rates of pure pine, pure fir, and a 50-percent mixture of each species planted at 6-, 12-, and 18-foot spacings. Height growth of pure pine was about twice as great as that of pure fir because of damage to the fir from frost and animals; growth of the pine-fir mixture was intermediate. Both basal area and total cubic volume increment per acre increased at the narrower spacing but diameter growth per tree was less. The height advantage of the pine is likely to be maintained in the future.

    Publication Notes

    • Visit PNW's Publication Request Page to request a hard copy of this publication.
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.


    Seidel, K.W. 1985. A ponderosa pine-grand fir spacing study in central Oregon: results after 10 years. USDA Forest Service PNW Research Note No. 429. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 8 p


    Google Scholar


    stand density, plantation spacing (-growth, increment, ponderosa pine, grand fir, central Oregon, Oregon (central)

    Related Search

    XML: View XML
Show More
Show Fewer
Jump to Top of Page