Compatible Estimates of Basal Area and Basal Area Growth from Remeasured Point Samples
Abstract:Compatible estimates of basal area and basal area growth have the growth estimate equal to the difference in successive basal area estimates. The compatible growth estimator associated with the usual basal area estimator has a high variance; a noncompatible growth estimator with less variance is usually preferred. A new compatible estimator is proposed for use with trees selected by the usual Bitterlich sampling procedure. This estimator, which requires some additional measurements, results in an increased variance for basal area estimation and a greatly reduced variance for growth estimation compared to the usual compatible estimation procedure; the latter variance approaches that of the noncompatible growth estimator. A purely random distribution of trees is assumed and deterministic formulas are used to calculate variances. Extensions to volume estimation are discussed. Forest Sci. 27:191-203.
Document Type: Journal Article
Affiliations: Ph.D. Student, School of Forest Resources, University of Georgia, Athens, GA 30602
Publication date: 1981-03-01
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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.
Forest Science is published bimonthly in February, April, June, August, October, and December.
2015 Impact Factor: 1.702
Ranking: 16 of 66 in forestry
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