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United States Department of Agriculture
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Estimating past diameters of Douglas-fir trees.
Author(s): Floyd A. Johnson
Date: 1955
Source: Res. Note PNW-RN-112. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 4 p
Publication Series: Research Note (RN)
PDF: Download Publication (404 KB)Description
Estimates of breast-height diameter outside bark for trees as of some previous date are required in certain kinds of forest growth studies. These past diameters may be found by subtracting total diameter growth from known present diameters, where total diameter growth is the sum of wood growth and bark growth.
Wood growth is readily obtained by measuring the combined width of a given number of annual rings on cores extracted from trees. Bark growth, however, must be approached indirectly by some procedure like the one to be described.Publication Notes
- Visit PNW's Publication Request Page to request a hard copy of this publication.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
Citation
Johnson, Floyd A. 1955. Estimating past diameters of Douglas-fir trees. Res. Note PNW-RN-112. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 4 pKeywords
Measuring diameter, wood growth, bark growthRelated Search
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https://www.fs.usda.gov/treesearch/pubs/30520