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A Comparison of the Time Required for Two Methods of Selecting Site Trees in Juvenile Stands

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In British Columbia, the largest diameter tree is used as a site tree for estimating site index. Some forest practitioners feel that in young stands it would be easier to select the tallest tree as a site tree. To test this hypothesis, we established fifty 0.01 ha sample plots and timed the selection of both the largest diameter tree and the tallest tree in each plot. Although the difference was not statistically significant, it took less time to select the largest diameter tree than the tallest tree, and in both cases it was less than 5 minutes. The slope of the plot influenced the time it took to locate the tallest tree but not the largest diameter tree. In 60% of the plots, the largest diameter tree was also the tallest tree. When the largest diameter tree was not the tallest tree, the estimated site index from the tallest tree was higher than that from the largest diameter tree. Whichever method of selecting site trees is used, it should be applied throughout the life of the stand.

Keywords: Diameter; site index; survey; top height

Document Type: Miscellaneous

Affiliations: 1: Research Branch, B.C. Ministry of Forests, P.O. Box 9519 Stn. Prov. Govt., Victoria, BC, Canada, V8W 9C2, 2: Prince Rupert Forest Region, B.C. Ministry of Forests, Bag 5000, 3726 Alfred Avenue, Smithers, BC, Canada, V0J 2N0,

Publication date: September 1, 2003

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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 Northern Journal of Applied Forestry covers northeastern, midwestern, and boreal forests in the United States and Canada.
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