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Relationships of density, microfibril angle, and sound velocity with stiffness and strength in mature wood of Douglas-fir

Creator:: Lachenbruch, Barbara, Johnson, G. R., Downes, G., and Evans, R.
Abstract:: The relative importance of density, acoustic velocity, and microfibril angle (MFA) for the prediction of the stiffness (MOE) and strength (MOR) has not been well established for Douglas-fir (Pseudotsuga menziesii). MOE and MOR of small clear specimens of mature wood were better predicted by density and velocity than by either...
Resource Type:: Article
Full Text:: Materials Science and Engineering, Clayton, Victoria, Australia. 1Corresponding author (e-mail

The growing season carbon balance of a sub-boreal clearcut 5 years after harvesting using two independent approaches to measure ecosystem CO₂ flux

Creator:: Pypker, Thomas G. and Fredeen, Arthur L.
Abstract:: From 27 June to 3 September 1999, CO2 fluxes from a 5-year-old, 84.15-ha vegetated clearcut in sub-boreal British Columbia were measured using a Bowen ratio energy balance (BREB) system and a second approach (the component model) that was based on scaled up CO2-flux measurements from belowground and plants (spruce seedlings...
Resource Type:: Article
Full Text:: clearcut 5 years after harvesting using two independent approaches to measure ecosystem CO2 flux Thomas G

Is long primary growth associated with stem sinuosity in Douglas-fir?

Creator:: Gartner, Barbara L. and Johnson, G. R.
Abstract:: Stem sinuosity is a highly visible stem-form trait in the leaders of fast-growing Douglas-fir (Pseudotsuga menziesii var. (Mirb.) Franco) trees, yet its cause is unknown. We tested the hypotheses that sinuous stems have longer expanses of primary growth than nonsinuous stems (putting the leader at higher risk curvature, induction of...
Resource Type:: Article
Full Text:: 15161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293 S e c o n d a ry g ro w th (c m ) 0 10 20 30 40 50 60

Leaf-level physiology in four subalpine plants in tephra-impacted forests during drought

Creator:: Watt, Abby J., Fischer, Dylan G., Antos, Joseph A., and Zobel, Donald B.
Abstract:: Ecological impacts of climate change in the Pacific Northwest may hinge on acclimation to drier summers, highlighting the importance of plant physiological studies in forests. Evaluating dominant forest plant species under old-growth and managed forest conditions is similarly important as timber harvest might change microclimates and alter drought effects on...
Resource Type:: Article
Full Text:: -impacted forests during drought Abby J. Watt, Dylan G. Fischer, Joseph A. Antos, and Donald B. Zobel

Enlargement of canopy gaps associated with a fungal pathogen in Yosemite Valley, California

Creator:: Rizzo, D. M., Slaughter, G. W., and Parmeter, J. R.
Abstract:: The enlargement of 21 canopy gaps associated with the root pathogen Heterobasidion annosum (Fr.:Fr.) Bref. (; Fomes annosus (Fr.) Karst.) in the mixed-conifer forest of Yosemite Valley was monitored between 1971 and 1998. Mean expanded gap area was 232 m2 (range 38–802 m2) in 1971 and 1455 m2 (range 150–4216...
Resource Type:: Article
Full Text:: . Garbelotto, M., Slaughter, G., Popenuck, T., Cobb, F.W., and Bruns T.D. 1997. Secondary spread

Wood density of young-growth western hemlock: relation to ring age, radial growth, stand density, and site quality

Creator:: DeBell, Dean S., Singleton, Ryan, Gartner, Barbara L., and Marshall, David D.
Abstract:: Breast-high stem sections were sampled from 56 western hemlock (Tsuga heterophylla (Raf.) Sarg.) trees growing in 15 plots representing a wide range of tree and site conditions in northwestern Oregon. Growth and wood density traits of individual rings were measured via X-ray densitometry, and relationships of ring density and its...
Resource Type:: Article
Full Text:: growth rate were analyzed. Ring density was highest (0.49 g/cm3) near the pith, declined to 0.40 g/cm3 at

Detecting landscape changes in the interior of British Columbia from 1975 to 1992 using satellite imagery

Creator:: Sachs, Donald L., Sollins, Phillip, and Cohen, Warren B.
Abstract:: To consider the regional scale effects of forest management requires complete and consistent data over large areas. We used Landsat Thematic Mapper and Multispectral Scanner (TM and MSS) imagery to map forest cover and detect major disturbances between 1975 and 1992 for a 4.2 x 106 ha area of interior...
Resource Type:: Article
Full Text:: October 2, 1997. D.L. Sachs.1 335 Victoria Street, Kamloops, BC V2C 2A3, Canada. P. Sollins.Forest

Shared compatibility of ectomycorrhizae on Pseudotsuga menziesii and Betula papyrifera seedlings grown in mixture in soils from southern British Columbia

Creator:: Simard, Suzanne W., Molina, Randy, Smith, Jane E., Perry, David A., and Jones, Melanie D.
Abstract:: Seedlings of Pseudotsuga menziesii (Mirb.) Franco and Betula papyrifera Marsh. were grown in the greenhouse in monoculture and dual culture in soils collected from a young mixed species plantation in the southern interior of British Columbia. The objectives of the study were (i) to evaluate the ability of P. menziesii...
Resource Type:: Article
Full Text:: .) Sarg.), rhododendron (Rhododendron macrophyllum G. Don), and salal (Gaultheria shallon Pursh), when

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...
Resource Type:: Article
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

Assessing innovativeness in the North American softwood sawmilling industry using three methods

Creator:: Knowles, Christopher David, Hansen, Eric, and Shook, Steven R.
Abstract:: Using a mail questionnaire targeted 500 softwood sawmills in the United States and Canada, firm innovativeness was assessed using three methods: (1) current technology, (2) self-evaluation, and (3) a new scale -- the propensity to create and adopt scale. The results of the these three methods were then compared to...
Resource Type:: Article
Full Text:: necessarily account for implementation. Tornatzky and Klein (1982) note that a dependent measure of

ScholarsArchive@OSU

Relationships of density, microfibril angle, and sound velocity with stiffness and strength in mature wood of Douglas-fir

The growing season carbon balance of a sub-boreal clearcut 5 years after harvesting using two independent approaches to measure ecosystem CO₂ flux

Is long primary growth associated with stem sinuosity in Douglas-fir?

Leaf-level physiology in four subalpine plants in tephra-impacted forests during drought

Enlargement of canopy gaps associated with a fungal pathogen in Yosemite Valley, California

Wood density of young-growth western hemlock: relation to ring age, radial growth, stand density, and site quality

Detecting landscape changes in the interior of British Columbia from 1975 to 1992 using satellite imagery

Shared compatibility of ectomycorrhizae on Pseudotsuga menziesii and Betula papyrifera seedlings grown in mixture in soils from southern British Columbia

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

Assessing innovativeness in the North American softwood sawmilling industry using three methods

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