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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...
Resource Type:: Article
Full Text:: X01-162.vp Douglas-fir soil C and N properties a decade after

Characterizing perpendicular-to-grain compression (C-perpendicular to) behavior in wood construction

Creator:: Basta, Craig Thomas, Gupta, Rakesh, Leichti, Robert J., and Sinha, Arijit
Abstract:: Current compression perpendicular-to-grain (C-perpendicular to) design values for wood members are based on mean stress obtained from ASTM D143 specimen. The standard ASTM test with metal on wood bearing has limited applicability in modern construction assemblies with C-perpendicular to loading scenarios. Previous work has shown that end-bearing conditions and wood-on-wood...
Resource Type:: Article
Full Text:: corresponding den- sification (Figure 5b,c). Such specimens had a tendency to crack through the pith when pith

Monte Carlo simulations of the rate of intramolecular end-to-end contact in alkane chains

Creator:: Nairn, J. A. and Braun, C. L.
Abstract:: We report Monte Carlo simulations of the dynamics of intramolecular contact in alkane chains and in end‐labeled alkane chains. The chain is confined to a diamond lattice except during conformational jumps. Rotational jumps around internal bonds provide the mechanism for change in the end‐to‐end separation but crankshaft‐like motions of the...
Resource Type:: Article
Full Text:: contact in alkane chains J. A. Nairna) and C. L. Braun Department o/Chemistry, Dartmouth College

Regenerating white spruce, paper birch, and willow in south-central Alaska

Creator:: Cole, E. C., Newton, Michael, and Youngblood, A.
Abstract:: The current spruce bark beetle (Dendroctonus rufipennis Kirby) epidemic in interior Alaska is leaving large expanses of dead spruce with little spruce regeneration. Many of these areas are habitat for moose (Alces alces). To establish spruce regeneration and improve browse production for moose, paper birch (Betula papyrifera Marsh), willow (Salix...
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Full Text:: 5 5 S te m Vo lu m e (c m )3 20 40 60 80 100 (a) (b) Year R el at iv e G ro w th R

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....
Resource Type:: Article
Full Text:: remnant trees in a multiple-age Douglas-fir forest Stephen C. Sillett and Matthew N. Goslin Abstract

Estimating forest productivity in the eastern Siskiyou Mountains of southwestern Oregon using a satellite driven process model, 3-PGS

Creator:: Coops, N. C. and Waring, R. H.
Abstract:: The 3-PGS (physiological principles for predicting growth using satellite data) model generates monthly estimates of transpiration, photosynthesis, and net primary production (NPP), the latter derived as a fixed proportion (0.47) of gross photosynthesis. To assess the reliability of a simplified process model (3-PGS) to predict the productive capacity of coniferous...
Resource Type:: Article
Full Text:: effects of sub-freezing temperatures (<0°C) using a frost modifier calculated from the number of frost

Contributions of ectomycorrhizal fungal mats to forest soil respiration

Creator:: Phillips, C. L., Kluber, L. A., Martin, J. P., Caldwell, B. A., and Bond, B. J.
Abstract:: Distinct aggregations of fungal hyphae and rhizomorphs, or "mats", formed by some genera of ectomycorrhizal (EcM) fungi are common features of soils in coniferous forests of the Pacific Northwest. We measured in situ respiration rates of Piloderma mats and neighboring non-mat soils in an old-growth Douglas-fir forest in western Oregon...
Resource Type:: Article
Full Text:: Contributions of ectomycorrhizal fungal mats to forest soil respiration C. L. Phillips1,4, L. A. Kluber2,3, J

Evidence for xylem embolism as a primary factor in dehydration-induced declines in leaf hydraulic conductance

Creator:: Johnson, Daniel M., McCulloh, Katherine A., Woodruff, David R., and Meinzer, Frederick C.
Abstract:: Hydraulic conductance of leaves (K[subscript leaf]) typically decreases with increasing water stress and recent studies have proposed different mechanisms responsible for decreasing K[subscript leaf]. We measured K[subscript leaf] concurrently with ultrasonic acoustic emissions (UAEs) in dehydrating leaves of several species to determine whether declining K[subscript leaf] was associated with xylem...
Resource Type:: Article
Full Text:: , KATHERINE A. MCCULLOH2, DAVID R. WOODRUFF3 & FREDERICK C. MEINZER3 1Nicholas School of the Environment

Fertilization impacts on Swiss needle cast disease severity in western Oregon

Creator:: Mulvey, Robin L., Shaw, David C., and Maguire, Douglas A.
Abstract:: The influence of fertilization on disease severity is unknown in most forest pathosystems. Fertilization treatments were randomly applied to 0.01 ha plots centered on individual dominant or co-dominant Douglas-fir trees in ten Douglas-fir stands from coastal Oregon to the foothills of the Oregon Cascade Range, USA. This region is affected...
Resource Type:: Article
Full Text:: . Mulvey ⇑, David C. Shaw, Douglas A. Maguire Department of Forest Engineering, Resources and Management

Hydraulic safety margins and embolism reversal in stems and leaves: Why are conifers and angiosperms so different?

Creator:: Johnson, Daniel M., McCulloh, Katherine A., Woodruff, David R., and Meinzer, Frederick C.
Abstract:: Angiosperm and coniferous tree species utilize a continuum of hydraulic strategies. Hydraulic safety margins (defined as differences between naturally occurring xylem pressures and pressures that would cause hydraulic dysfunction, or differences between pressures resulting in loss of hydraulic function in adjacent organs (e.g., stems vs. leaves) tend to be much...
Resource Type:: Article
Full Text:: embolism reversal in stems and leaves: Why are conifers and angiosperms so different? R H c D a b c

ScholarsArchive@OSU

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

Characterizing perpendicular-to-grain compression (C-perpendicular to) behavior in wood construction

Monte Carlo simulations of the rate of intramolecular end-to-end contact in alkane chains

Regenerating white spruce, paper birch, and willow in south-central Alaska

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

Estimating forest productivity in the eastern Siskiyou Mountains of southwestern Oregon using a satellite driven process model, 3-PGS

Contributions of ectomycorrhizal fungal mats to forest soil respiration

Evidence for xylem embolism as a primary factor in dehydration-induced declines in leaf hydraulic conductance

Fertilization impacts on Swiss needle cast disease severity in western Oregon

Hydraulic safety margins and embolism reversal in stems and leaves: Why are conifers and angiosperms so different?

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