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Field Note: Efficiency of Sampling Tree Regeneration with Two Plot Sizes in Northern Arizona

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Two circular plot sizes, 1/300 and 1/100 ac, were compared to determine which plot size was the most efficient for use in ponderosa pine forests on the Coconino National Forest, Arizona. Eighteen harvested stands were selected for sampling, and regeneration plots were installed in each stand. The two plot sizes were overlaid on each plot center and data were recorded separately for each plot size. For each stand the expected total sampling time was calculated and used to determine which plot size required the least sampling effort while providing the same precision of estimated seedling densities. We found that the 1/300-ac plot size was the most efficient plot size for sampling tree regeneration.
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Keywords: Coconino National Forest; coefficient of variation; sample size; seedling density

Document Type: Research Article

Publication date: 2012-04-01

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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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