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Browsing by Subject "Douglas fir -- Oregon"
Now showing items 1-13 of 13
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(1992-12-18)I studied species' abundances and habitat relationships of breeding and winter birds in commercially thinned and unthinned Douglas-fir (Pseudotsuga menziesii) stands from May 1989 to June 1991. The study was conducted ...
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(1977-06-14)Snags, standing dead trees, are used by many species of wildlife. Despite the importance of snags their basic ecology remains unknown. Some forest management practices eliminate snags from the forest with a concomitant ...
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(Corvallis, Ore. : Oregon Forest Research Center, 1959-11)
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(1996-07-12)This research examined thinning effects on stand structure and species composition in 50- to 120-year-old Douglas-fir forests. Thirty-two paired stands (thinned and unthinned) were measured throughout western Oregon, a ...
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(1990-03-01)Diameter growth of Douglas-fir (Pseudotsuqa menziesii (Mirb.) Franco) estimated from increment cores was compared with that obtained from repeated measurements of tree diameter on permanent plots located in two Douglas-f ...
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(Corvallis, OR : College of Forestry, Forest Research Laboratory, Oregon State University, 1998)
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(1989-11-21)Improving vegetation management decisions in Pacific Northwest forests requires a better understanding of the interactions between planted conifers and associated vegetation. A practical index of interspecific competiti ...
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(Corvallis, Or. : Forest Research Laboratory, School of Forestry, Oregon State University, 1982-09)
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(Madison, Wis. : U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1947-11)
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(Corvallis, Or. : Oregon Forest Products Laboratory, 1953)
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(Salem, Or. : Oregon State Board of Forestry, 1952-12)
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(Corvallis, Ore. : Forest Lands Research, Oregon Forest Research Center, 1961-05)
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(Corvallis, Or. : Forest Research Laboratory, School of Forestry, Oregon State University, 1974-02)
Now showing items 1-13 of 13
