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Height-Diameter and Height-Diameter-Age Equations For Second-Growth Douglas-Fir

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A number of height-diameter and height-diameter-age equations were compared for second-growth Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco). Most gave similar results within the range of the data. Some appeared undesirable because of unreasonable curve shapes when extrapolated. For remeasured plots, use of a single height-diameter-age equation for each plot rather than individual height-diameter curves for each measurement will give more accurate and more consistent estimates of volume, periodic increment, and site index. A number of suitable equation forms are suggested.

Document Type: Journal Article

Affiliations: Mensurationist, Pacific Northwest Forest and Range Expt. Sta., Forest Service, U.S. Dept. of Agric., Portland, Oreg.

Publication date: 1967-12-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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