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Estimation of Crown Cover in Interior Ponderosa Pine Stands: Effects of Thinning and Prescribed Fire

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We evaluated the relationship between crown cover measured with a vertical sight tube and stand basal area per acre in treated (thinned, burned, and thinned and burned) and untreated interior ponderosa pine (Pinus ponderosa P. & C. Lawson) stands in northeastern California. Crown cover was significantly related to basal area at the plot level and stand level. In addition, the relationship was not affected by two extremely different thinning regimes. However, the predicted crown cover was generally lower, for a given level of basal area, in a recently thinned stand than in a stand that had not been recently thinned. Prescribed fire had no detectable effect on the relationship. The maximum measured value of stand level crown cover in untreated stands in this study was about 60 percent. West. J. Appl. For. 20(4): 240–246.

Keywords: Sight tube; basal area; environmental management; forest; forest management; forest resources; forestry; forestry research; forestry science; natural resource management; natural resources; white fir

Document Type: Regular Article

Affiliations: 1: Pacific Southwest Research Station Redding CA 96002 Phone: (530) 226-2547;, Fax: (530) 226-5091, Email: 2: Pacific Southwest Research Station Redding CA 96002

Publication date: 2005-10-01

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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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