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Notes: Formulated Site Index Curves for Major Timber Species in Ontario

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Extension of the Richards growth model provides an excellent description of Plonski's site index curves for the major timber species of Ontario. Equations expressing height as a function of age and site index were derived based on a nonlinear regression analysis and least-squares approximation techniques. These equations facilitate computer processing and their first partial derivatives with respect to age provide approximate annual height growth estimates useful in the absence of localized growth data. The growth model employed here should be useful in describing site-index curves of other species, particularly those which have sigmoid and doubly asymptotic and polymorphic height-growth patterns. Forest Sci. 20:143-144.

Keywords: Site productivity; biological growth models

Document Type: Miscellaneous

Affiliations: Research Scientist, Department of the Environment, Canadian Forestry Service, Great Lakes Forest Research Centre, Sault Ste. Marie, Ontario

Publication date: 1974-06-01

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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