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Method for Estimating Bole Volume

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Use of order statistics and of "jackknifing" in the second phase of double sampling can increase the accuracy and precision of regression estimates. This approach is especially useful for volume estimation where the cost ratio and the correlation between volume determination and diameter measurement are high. Spacing of the selected and ranked sample is at the optimum when both volume and diameter are normally distributed. The advantages and superiority of the procedure may diminish if the assumptions of normality and high correlation are not met. The additional costs of ranking and sample selection should be justified by the improved efficiency. Other potential applications include biomass studies and combined aerial photographic and field inventory.
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Document Type: Journal Article

Affiliations: Professor, Department of Forestry, Southern Illinois University, Carbondale 62901

Publication date: 1983-04-01

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  • The Journal of Forestry is the most widely circulated scholarly forestry journal in the world. In print since 1902, the Journal has received several national awards for excellence. The mission of the Journal of Forestry is to advance the profession of forestry by keeping forest management professionals informed about significant developments and ideas in the many facets of forestry: economics, education and communication, entomology and pathology, fire, forest ecology, geospatial technologies, history, international forestry, measurements, policy, recreation, silviculture, social sciences, soils and hydrology, urban and community forestry, utilization and engineering, and wildlife management. The Journal is published bimonthly: January, March, May, July, September, and November.

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