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Estimating Tree Ages in Uneven-Aged Hardwood Stands

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Two groups of upland hard-wood trees from the same general area were studied by 44 volunteer observers to determine the ability of the observers to visually estimate tree ages. The error of estimate for tree ages varied by the professional category of the observer, and all categories of observer improved with training. The error of age estimate over all categories of observer was 40.2% on the age estimation for the first group of trees. On the second group of trees, after being supplied with the correct ages for trees in the first group, the volunteer observers reduced the overall error to 22.1%. The best individual effort was achieved by a forester whose error on the first attempt was 16.5% with a 10.7% error on his second attempt. However, for most workers, on-the-ground training is essential for reasonable accuracy in age estimation. South. J. Appl. For. 13(1):40-42.

Document Type: Journal Article

Affiliations: USDA Forest Service, Southern Forest Experiment Station, Sewanee, TN 37375

Publication date: February 1, 1989

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 Southern Journal of Applied Forestry covers an area from Virginia and Kentucky south to as far west as Oklahoma and east Texas.
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