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Ten-Year Survival and Growth of Planted Douglas-Fir and Western Redcedar After Seven Site-Preparation Treatments

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Western redcedar (Thuja plicata) and Douglas-fir (Pseudotsuga menziesii) were planted together after applying seven site-preparation methods at one site in the Oregon Coast Ranges. Survival and growth of cedar were markedly less than Douglas-fir on this favorable site where both species were components of the original stand. Repeated browsing severely impeded the cedar. Site preparation by broadcast burning generally yielded the best results, but sowing grass after broadcast burning produced Douglas-fir responses similar to those for no site preparation. Where grass was sown, herbaceous cover was more abundant and taller, salmonberry differed little in density but was slightly taller, and development of red alder (Alnus rubra) was delayed. Red alder is currently overtopping conifers in all treatments, and release is needed to ensure sufficient conifer survival. This single example illustrates that much more effort than just planting a mix of species is required to establish a desired mixed stand. West. J. Appl. For. 12(3):74-80.

Document Type: Journal Article

Affiliations: USDA Forest Service, Pacific Northwest Research Station, Forestry Sciences Laboratory, 3200 SW Jefferson Way, Corvallis, OR 97331

Publication date: 1997-07-01

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  • Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Western Journal of Applied Forestry covers the western United States, including Alaska, and western Canada; WJAF will also consider manuscripts reporting research in northern Mexico that has potential application in the southwestern United States.
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