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Comparing the Efficiency of Three Inventory Sampling Methods To Determine Timber Volumes in Pinyon-Juniper Woodlands

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We compared three sampling methods to determine timber volumes in pinyon-juniper (Pinus edulis-Juniperus spp.) woodlands, fixed radius plots, variable radius "point" sampling, and line intercept transects. Based on the criterion of the square of the standard error of the mean volume per acre multiplied by total time required to take the field measurements, line intercept transect sampling was the most efficient method. Fixed plot sampling had the highest standard error of the mean and highest measurement time, while point sampling fell between the other two methods in measurement time and standard error of the mean. Based on this analysis, transect sampling is an efficient approach for inventorying pinyon-juniper woodlands, in terms of required field time and in the variance estimates of volume per acre. West. J. Appl. For. 7(4):110-113.
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Document Type: Journal Article

Affiliations: School of Forestry, Northern Arizona University, P.O. Box 4098, Flagstaff, AZ 86011

Publication date: 1992-10-01

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  • Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Western Journal of Applied Forestry covers the western United States, including Alaska, and western Canada; WJAF will also consider manuscripts reporting research in northern Mexico that has potential application in the southwestern United States.
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