Index Catalog // ScholarsArchive@OSU

Focus on Forestry ; Vol. 11, No. 1 (Winter 1998)

Creator:: Oregon State University. College of Forestry, Brown, George, Wells, Gail, White, Seth, and Roorbach, Ashley
Abstract:: Magazine of the OSU College of Forestry.
Resource Type:: Other
Full Text:: Rebecca Johnson agrees. Forestry, she says, is a very public enterprise that demands a high degree of

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:: . 1. Hydraulic safety margins decreased with increasing stem capacitance ((a), D.M. Johnson et al

Crown profile equations for stand-grown western hemlock trees in northwestern Oregon

Creator:: Marshall, David D., Johnson, Gregory P., and Hann, David W.
Abstract:: Crown profile equations were developed for stand-grown western hemlock (Tsuga heterophylla (Raf.) Sarg.) in northwest Oregon. The profile model uses a segmented approach, dividing the crown into an upper and lower portion at the point of the largest crown width (LCW). The model explains about 86% of the variation in...
Resource Type:: Article
Full Text:: northwestern Oregon David D. Marshall, Gregory P. Johnson, and David W. Hann Abstract: Crown profile

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:: reduction in amplitude with a greater percentage of accumulated acoustic emissions. 764 D. M. Johnson et al

Effect of growth ring orientation and placement of earlywood and latewood on moe and mor of very-small clear Douglas-fir beams

Creator:: Grotta, A. T., Leichti, R. J., Gartner, Barbara L., and Johnson, G. R.
Abstract:: ASTM standard sizes for bending tests (either 50 × 50 mm or 25 × 25 mm in cross-section) are not always suitable for research purposes that characterize smaller sections of wood. Moreover, the ASTM standards specify loading the sample on the longitudinal-tangential surface. If specimens are small enough, then the...
Resource Type:: Article
Full Text:: southern yellow pine. Bull. No. 42, N.Y. State College of Forestry, Syracuse, NY. Johnson, G. R., A. T

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:: in Douglas-fir? Barbara L. Gartner and G.R. Johnson Abstract: Stem sinuosity is a highly visible

The market for waterfowl hunting on private agricultural land in western Oregon

Creator:: Rasker, Ray, Cleaves, David A., Johnson, Rebecca L., 1955-, and Oregon State University. Forest Research Laboratory
Abstract:: Trends in fee hunting in Oregon are examined, with particular emphasis on waterfowl in the western part of the state. Farmers with potential or existing waterfowl habitat in western Oregon were surveyed about their views on managing their lands for waterfowl. As incentives to such practices, they listed the financial...
Resource Type:: Technical Report
Full Text:: Private Agricultural Land in Western Oregon Raymond Rasker Rebecca L. Johnson David Cleaves FOREIT

Forest Measurement and Biometrics in Forest Management: Status and Future Needs of the Pacific Northwest USA

Creator:: Temesgen, Hailemariam, Goerndt, Michael E., Johnson, Greg P., Adams, Darius M., and Monserud, Robert A.
Abstract:: Forest measurement and biometrics (FMB) programs have been at the heart of forestry education in North America since its beginnings at the Biltmore Forest School more than 100 years ago. Over the intervening period, the field of forestry has changed in critical ways. There are many forest management and policy...
Resource Type:: Article
Full Text:: . Johnson, Darius M. Adams, and Robert A. Monserud Forest measurement and biometrics (FMB) programs have

Silviculture and Swiss needle cast : research and recommendations

Creator:: Filip, Gregory M., Kanaskie, Alan, Kavanagh, Kathleen L., 1955-, Johnson, Greg, Johnson, Randy (G. Randy), Maguire, Douglas A. (Douglas Alan), and Oregon State University. Forest Research Laboratory
Abstract:: For the past ten years, Douglas-fir on the Oregon and Washington coast has shown a progressive decrease in height and diameter increment as a result of Swiss needle cast, which is caused by Phaeocryptopus gaeumannii. In this contribution, we discuss the effects of silvicultural operations on Swiss needle cast and...
Resource Type:: Technical Report
Full Text:: Resources at the Uni- versity of Idaho. Greg Johnson is a biometrician for Willamette Industries, Inc. Randy

Conservation Plans for the Northern Spotted Owl in Oregon: The Economic Implications of Changing Timber Availability

Creator:: Greber, Brian J., Johnson, K. Norman, and Lettman, Gary
Abstract:: Recently released national forest plans and conservation plans for the protection of the northern spotted owl all call for a change in management direction on public forest lands in Oregon. The result will be a substantial reduction in public timber harvests in the state. This report summarizes how the conservation...
Resource Type:: Technical Report
Full Text:: . Norman Johnson Gary Lettman Forest Research Laboratory College of Forestry Oregon State University

ScholarsArchive@OSU

Focus on Forestry ; Vol. 11, No. 1 (Winter 1998)

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

Crown profile equations for stand-grown western hemlock trees in northwestern Oregon

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

Effect of growth ring orientation and placement of earlywood and latewood on moe and mor of very-small clear Douglas-fir beams

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

The market for waterfowl hunting on private agricultural land in western Oregon

Forest Measurement and Biometrics in Forest Management: Status and Future Needs of the Pacific Northwest USA

Silviculture and Swiss needle cast : research and recommendations

Conservation Plans for the Northern Spotted Owl in Oregon: The Economic Implications of Changing Timber Availability

Limit your search

Academic Affiliation

Advisor

Commencement Year

Committee Member

Conference Name

Creator

Contributor

Date

Decade

Degree Field

Degree Level

Degree Name

File Format

Language

License

Non-Academic Affiliation

Peer Reviewed

Resource Type

Rights Statement

Subject

Search Constraints

Search Results

Limit your search