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Notes: Effect of Planting Stock Length and Spacing on Growth of Black Cottonwood

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Comparisons were made of performance among 0.5 m stem cuttings and 2.4 and 4.6 m sets (rootless stems). Total height and dbh at 6 years were greatest with the longest planting stock but the differences were not as large as the initial differences among planting stock. Thus the 0.5 m cuttings grew more rapidly than the longer sets. Bole crooks were also affected by size of planting stock with over 90 percent of the trees from the tallest sets showing crookedness. Both frequency and degree of crookedness were greater with the two larger sizes of planting stock. Crookedness was primarily due to growth irregularities the first year following planting. Tree height growth and dbh were less at wide spacings (3.0 x 9.1 and 6.1 x 9.1 m) than at 3.7 x 3.7 m spacing. Poorer growth at the two wide spacings was probably at least partly due to greater grass competition at wider spacings. Forest Sci. 25:439-443.
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Keywords: Populus trichocarpa; bole crookedness; planting method; tree quality

Document Type: Miscellaneous

Affiliations: Research Technologist, Western Washington Research and Extension Center, Puyallup, Wash. 98371

Publication date: 1979-09-01

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    Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
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