Index Catalog // ScholarsArchive@OSU

Douglas-fir soil C and N properties a decade after termination of urea fertilization

Creator:: Homann, Peter S., Caldwell, Bruce A., Chappell, H. N., Sollins, Phillip, and Swanston, Chris W.
Abstract:: Chemical and microbial soil properties were assessed in paired unfertilized and urea fertilized (>89 g N·m–2) plots in 13 second-growth Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stands distributed throughout western Washington and Oregon. A decade following the termination of fertilization, fertilized plots averaged 28% higher total N in the O layer...
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Full Text:: X01-162.vp Douglas-fir soil C and N properties a decade after

The effect of local stand structure on growth and growth efficiency in heterogeneous stands of ponderosa pine and lodgepole pine in central Oregon

Creator:: Mainwaring, Douglas B. and Maguire, Douglas A. (Douglas Alan)
Abstract:: Basal area and height growth were analyzed for individual trees in uneven-aged ponderosa pine (Pinus ponderosa Dougl. ex Laws.) and lodgepole pine (Pinus contorta Dougl. ex. Loud.) stands in central Oregon. Basal area growth was modeled as a function of other stand and tree variables to address three general objectives:...
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Full Text:: growth efficiency in heterogeneous stands of ponderosa pine and lodgepole pine in central Oregon Douglas

Pollen contamination trends in a maturing Douglas-fir seed orchard

Creator:: Adams, W. T., Hipkins, Valerie D., Burczyk, J., and Randall, W. K.
Abstract:: Pollen contamination was investigated in one block (block 4) of a 10-block Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seed orchard complex in western Oregon. Blocks (25 clones each) represent different breeding zones; thus, contaminant pollen sources not only included the adjacent natural stand of Douglas-fir, but also other blocks within the...
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Full Text:: Pollen contamination trends in a maturing Douglas-fir seed orchard1

Financial feasibility of marker-aided selection in Douglas-fir

Creator:: Johnson, G. R., Wheeler, N. C., and Strauss, S. H.
Abstract:: The land area required for a marker-aided selection (MAS) program to break-even (i.e., have equal costs and benefits) was estimated using computer simulation for coastal Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) in the Pacific Northwestern United States. We compared the selection efficiency obtained when using an index that included the phenotype...
Resource Type:: Article
Full Text:: X00-122.vp Financial feasibility of marker-aided selection in Douglas

Impact of competitor species composition on predicting diameter growth and survival rates of Douglas-fir trees in southwestern Oregon

Creator:: Bravo, Felipe, Hann, David W., and Maguire, Douglas A. (Douglas Alan)
Abstract:: Mixed conifer and hardwood stands in southwestern Oregon were studied to explore the hypothesis that competition effects on individual-tree growth and survival will differ according to the species comprising the competition measure. Likewise, it was hypothesized that competition measures should extrapolate best if crown-based surrogates are given preference over diameter-based...
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Full Text:: diameter growth and survival rates of Douglas-fir trees in southwestern Oregon1 Felipe Bravo, David W

Ten-year growth and mortality in young Douglas-fir stands experiencing a range in Swiss needle cast severity

Creator:: Maguire, Douglas A., Mainwaring, Douglas B., and Kanaskie, Alan
Abstract:: Swiss needle cast, a foliar disease caused by the Ascomycete Phaeocryptopus gaeumannii (T. Rohde) Petr., continues to afflict Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) in north coastal Oregon. Permanent plots were installed in 1998 to assess growth impacts and monitor disease severity. Gross periodic annual increment was measured for three 2-year...
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Full Text:: mortality in young Douglas-fir stands experiencing a 3 range in Swiss needle cast severity 4 5 6

Crown structure and growth efficiency of red spruce in uneven-aged, mixed-species stands in Maine

Creator:: Maguire, Douglas A., Brissette, John C., and Gu, Lianhong
Abstract:: Several hypotheses about the relationships among individual tree growth, tree leaf area, and relative tree size or position were tested with red spruce (Picea rubens Sarg.) growing in uneven-aged, mixed-species forests of south-central Maine, U.S.A. Based on data from 65 sample trees, predictive models were developed to (i) estimate the...
Resource Type:: Article
Full Text:: , mixed-species stands in Maine Douglas A. Maguire, John C. Brissette, and Lianhong Gu Abstract:Several

Distribution of epiphytic macrolichens in relation to remnant trees in a multiple-age Douglas-fir forest

Creator:: Sillett, Stephen C. and Goslin, Matthew N.
Abstract:: Alternatives to clear-cutting are being implemented to increase biodiversity of managed forests in the Pacific Northwest. Lichens are an integral component of old growth, but lichen biomass develops slowly in forests. We evaluated the long-term potential of live tree retention for lichen conservation in Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) forests....
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Full Text:: remnant trees in a multiple-age Douglas-fir forest Stephen C. Sillett and Matthew N. Goslin Abstract

Effects of release from suppression on wood functional characteristics in young Douglas-fir and western hemlock

Creator:: Renninger, Heidi J., Gartner, Barbara L., and Meinzer, Frederick C.
Abstract:: Little is known of wood properties in trees that were initially suppressed and subsequently released from suppression. The purpose of this study was to assess differences in growth ring width, specific conductivity (Ks), tracheid dimensions, moisture content, and wood density in suppressed Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) and western hemlock...
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Full Text:: functional characteristics in young Douglas-fir and western hemlock Heidi J. Renninger, Barbara L. Gartner

Underplanted conifer seedling survival and growth in thinned Douglas-fir stands

Creator:: Brandeis, Thomas James, Newton, Michael, and Cole, Elizabeth C.
Abstract:: In a multilevel study to determine limits to underplanted conifer seedling growth, Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco), grand fir (Abies grandis (Dougl. ex D. Don) Lindl.), western redcedar (Thuja plicata Donn ex D. Don), and western hemlock (Tsuga heterophylla (Raf.) Sarg.) seedlings were planted beneath second-growth Douglas-fir stands that had...
Resource Type:: Article
Full Text:: thinned Douglas-fir stands1 Thomas J. Brandeis, Michael Newton, and Elizabeth C. Cole Abstract: In a

ScholarsArchive@OSU

Douglas-fir soil C and N properties a decade after termination of urea fertilization

The effect of local stand structure on growth and growth efficiency in heterogeneous stands of ponderosa pine and lodgepole pine in central Oregon

Pollen contamination trends in a maturing Douglas-fir seed orchard

Financial feasibility of marker-aided selection in Douglas-fir

Impact of competitor species composition on predicting diameter growth and survival rates of Douglas-fir trees in southwestern Oregon

Ten-year growth and mortality in young Douglas-fir stands experiencing a range in Swiss needle cast severity

Crown structure and growth efficiency of red spruce in uneven-aged, mixed-species stands in Maine

Distribution of epiphytic macrolichens in relation to remnant trees in a multiple-age Douglas-fir forest

Effects of release from suppression on wood functional characteristics in young Douglas-fir and western hemlock

Underplanted conifer seedling survival and growth in thinned Douglas-fir stands

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