Slash Pine Site Index From a Polymorphic Model by Joining (Splining) Nonpolynomial Segments With an Algebraic Difference Method
Abstract:Site index curves for slash pine plantations were improved by splining segments of two published height-age models in the form of algebraic differences thus avoiding the numerical approximation of derivatives. The splined site curves fit better than any single model across the entire range of data and have the desirable properties: (1) height is zero when age is zero, (2) height at base age equals site index, (3) each curve has a separate upper asymptote, and (4) the curves are invariant with respect to choice of base age. Forest Sci. 30:411--423.
Document Type: Journal Article
Affiliations: Mensurationist, USFS Southeastern Forest Experiment Station, Athens, Georgia
Publication date: 1984-06-01
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- 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.
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