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We sampled trees grown with and without competing vegetation control in an 11-year-old Douglas-fir (Pseudotsuga menziesii var. menziesii (Mirb.) Franco) plantation on a highly productive site in southwestern Washington to create diameter- based allometric equations for estimating individual-tree bole, branch, foliar, and total aboveground biomass. We used these equations to estimate per-hectare aboveground biomass, nitrogen (N), and carbon (C) content, and compared these results to (1) estimates based on biomass equations published in other studies, and (2) estimates made using the mean-tree method rather than allometric equations. Component and total-tree biomass equations were not influenced by the presence of vegetation control, although per-hectare biomass, C, and N estimates were greater where vegetation control was applied. Our biomass estimates differed from estimates using previously published biomass equations by as much as 23 percent. When using the mean-tree biomass estimation approach, we found that incorporating a previously published biomass equation improved accuracy of the mean-tree diameter calculation.
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Subjects
Douglas fir, Weed control, Analysis, Forest biomass, Measurement, Tree farms, EvaluationPlaces
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Estimating tree biomass, carbon, and nitrogen in two vegetation control treatments in an 11-year-old Douglas-fir plantation on a highly productive site
2013, United States Department of Agriculture, Forest Service, Pacific Northwest Research Station
in English
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"March 2013."
Format not distributed to depository libraries.
Includes bibliographical references (pages 21-24).
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- Created November 12, 2020
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September 22, 2024 | Edited by MARC Bot | import existing book |
November 12, 2020 | Created by MARC Bot | Imported from Library of Congress MARC record |