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A Method for Evaluating Fixed-Radius Plot Size When Sampling Western Juniper Seedlings and Saplings

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This note outlines a method for evaluating plot size selection for an inventory of western juniper woodlands in eastern Oregon. The Forest Inventory and Analysis (FIA) program of the USDA Forest Service in Portland, Oregon, used this method to evaluate several plot sizes to measure seedlings and saplings in the 1998 inventory of eastern Oregon. By choosing a 5 m radius plot, the probability of tallying no seedlings or saplings on four subplots is less than 10% for the three sample densities (0.01, 0.02, and 0.03 trees/m2) used. West. J. Appl. For. 17(4):207–208.

Keywords: Western juniper; environmental management; forest; forest inventory; forest management; forest resources; forestry; forestry research; forestry science; natural resource management; natural resources; sampling; sapling; seedling

Document Type: Miscellaneous

Affiliations: USDA Forest Service, Pacific Northwest Research Station, P.O. Box 3890 Portland, OR, 97208,

Publication date: October 1, 2002

More about this publication?
  • 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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