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Notes: Testing a Photographic Method for Measuring Stem Cross-Sections

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Digitized measurements from four photographic procedures using standard 3½ x 5 in. prints were evaluated for measurement of annual radial increments on cross-sectional discs from felled trees. All four procedures worked well for fast-growing trees. Growth increments for slow-growing trees were estimated relatively poorly, but varied over different photographic methods. For the slow-growing trees, 5 x 7 in. enlargements of black and white photographs of unplaned discs provided measurements that were not significantly different from hand-measured radial increments. For. Sci. 33(3):784-789.

Keywords: Abies balsamea; Picea glauca; Stem analysis; profile analysis

Document Type: Miscellaneous

Affiliations: Assistant Professor, Department of Forest Resources, University of Minnesota, St. Paul, MN 55108

Publication date: September 1, 1987

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