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Yield-Based Measures of Northern Hardwood Site Quality and Their Correlation with Soil-Site Factors

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The Chapman-Richards function was fit to yield data from northern hardwood stands on sites of different quality. The upper asymptote and maximum growth rate of each of the fitted curves were used as measures of the quality of each site, and were found to be significantly correlated with the concentrations of exchangeable calcium and magnesium on the sites and with aspect. No significant correlation was found between site index measurements and any of the 13 soil-site factors in this study. This was attributed to the difficulty of obtaining valid site index measurements in these stands. It was concluded that measures of site quality derived from fitted yield curves are practical alternatives to site index, provided sufficient yield data are available to obtain meaningful curves. Forest Sci. 31:209-219.

Keywords: Site index; cluster analysis; growth model; nonlinear regression

Document Type: Journal Article

Affiliations: Associate Professor, Department of Soil Science and Forestry, University of Wisconsin-Madison, Madison, WI 53706

Publication date: March 1, 1985

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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