Over-Age Drought Conifers of the Rocky Mountains
Extremely long life, especially of Douglas fir and pinyon pine, is found to be associated widely with very slow growth under an apparently adverse environment. Exceptionally dry sites bearing relatively small trees more than 500 years old have been sampled over an area of several hundred thousand square miles. Two trees of exceptional age were found: an 860-year-old pinyon pine and an 860-year-old Douglas fir. A growth curve is presented which shows a radial life history of the latter.
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Document Type: Journal Article
Affiliations: Dendrochronologist, Laboratory of Tree-Ring Research, University of Arizona, Tucson, Ariz., and Managing Editor, Tree-Ring Bulletin
Publication date: 1943-06-01
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