Index Catalog // ScholarsArchive@OSU

Fish and invertebrate distribution at multiple scales in Thomas Creek, Oregon : a transition from conifer uplands to agricultural lowlands

Creator:: Langshaw, Russell B.
Abstract:: Longitudinal patterns of fish and benthic invertebrate distribution and habitat use were similar in Thomas Creek, Oregon but clarity of these patterns differed. I studied fish and aquatic invertebrates simultaneously, at multiple scales, and used multivariate statistical techniques to compare responses to the same environmental conditions. Both types of organisms...
Resource Type:: Masters Thesis
Full Text:: Distribution At Multiple Scales In Thomas Creek, Oregon; A Transition From Conifer Uplands To Agricultural

A georeferenced digital image analysis of micro-topographic patterns within the Willamette Floodplain Research Natural Area, W. L. Finley National Wildlife Refuge

Creator:: Anderson, Karen L.
Abstract:: The present day vegetation pattern of the Willamette Valley is a result of a long past of human alteration of the landscape. Beginning with aboriginal burning of the grasslands to present day land uses, the vegetation of the valley has been affected by anthropogenic activity. Wet prairie is a vanishing...
Resource Type:: Capstone Project
Full Text:: Karen L. Anderson A Research Paper submitted to The Department of Geosciences Oregon State University

Nature in chains : the effects of Thomas Jefferson’s rectangular survey on a Pacific Northwest landscape

Creator:: Schweickert, Tina K.
Abstract:: Understanding the impact of humans on the environment has long been a topic of scholarly interest and debate. As environmental problems mount, accounts of historic ecological conditions and the factors of change become increasingly useful. This study considers competing schools of interpretation about human impacts on ecological landscapes and develops...
Resource Type:: Masters Thesis
Full Text:: , 2009. Title: Nature in Chains: The Effects of Thomas Jefferson’s Rectangular Survey on a Pacific

Comparing Himalayan blackberry (Rubus armeniacus) management techniques in upland prairie communities of the W.L. Finley National Wildlife Refuge

Creator:: Ensley, Jona L.
Abstract:: Dedicated to the preservation and promotion of many of the nation’s most threatened and endangered species, the W.L. Finley National Wildlife Refuge is highly invested in the management of some of the last remaining upland prairies once prevalent throughout Oregon's Willamette Valley. More than a century of land fragmentation, fire...
Resource Type:: Masters Thesis
Full Text:: _____________________________________________________________________ AN ABSTRACT OF THE THESIS OF Jona L. Ensley for the degree of Master of Science in

Spring nitrogen and cultivar effects on winter canola (Brassica napus L.) production in western Oregon

Creator:: Ferguson, Brock T.
Abstract:: Limited information is available on the effects of applied spring nitrogen (N) and cultivar on winter canola (Brassica napus L.) production in high-rainfall environments. The objectives of this investigation were: (i) to determine the effects of spring N and winter canola cultivars on seed and oil production characteristics, and (ii)...
Resource Type:: Masters Thesis
Full Text:: (Brassica napus L.) Production in Western Oregon AN ABSTRACT OF THE THESIS OF Brock T. Ferguson for

Spring irrigation management of perennial ryegrass (Lolium perenne L.) seed production

Creator:: King, Craig Millhouser
Abstract:: Introduction of later maturing cultivars of perennial ryegrass (Lolium perenne L.) places more seed production fields in a period of drought common to Oregon during vital stages of reproductive development. During these stages, the final yield of the crop is largely determined by the number of seeds set, and the...
Resource Type:: Masters Thesis
Full Text:: Management of Perennial Ryegrass (Lolium perenne L.) Seed Production. Abstract approved: Thomas G. Chastain

Applied nitrogen effects on yellow mustard (Sinapis alba L.) production in the Willamette Valley

Creator:: DuVal, Alyssa Susan
Abstract:: Nitrogen management recommendations for yellow mustard (Sinapis alba L.) production in the high rainfall environment of Oregon's Willamette Valley (WV) are not available. The objectives of this investigation were: (i) to determine the effect of applied nitrogen (N) on seed yield and yield components in yellow mustard, and (ii) to...
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ Thomas G. Chastain Nitrogen management recommendations for yellow mustard (Sinapis alba L

College persistence stories of low income, first-generation students

Creator:: Jewett, Gretchen L.
Abstract:: Low income, first-generation college students face many barriers in their pursuit of a college degree. As a result, the retention rates for this student population have traditionally been lower than for other student populations. In order to support the persistence of this student population it is important to study the...
Resource Type:: Masters Thesis
Full Text:: Stories of Low Income, First-Generation Students AN ABSTRACT OF THE THESIS OF Gretchen L

Trinexapac-ethyl and open-field burning in creeping red fescue (Festuca rubra L.) seed production in the Willamette Valley

Creator:: Zapiola, Maria Luz
Abstract:: Open-field burning has been an effective, economical, and widespread method of post-harvest residue management in creeping red fescue seed production in the Willamette Valley since the late 1940s. However, the use of field burning has been legislatively restricted due to air quality and safety issues. The foliar-applied plant growth regulator...
Resource Type:: Masters Thesis
Full Text:: Open-Field Burning in Creeping Red Fescue (Festuca rubra L.) Seed Production in the Willamette Valley

Trinexapac-ethyl timing and rate effects on crimson clover (Trifolium incarnatum L.) seed yield and seed yield components

Creator:: Morad, Mohammed
Abstract:: Oregon is the world’s leading producer of crimson clover (Trifolium incarnatum L.) seed. Recent research has reported that seed yield has been increased in cool-season grass and red clover (T. pratense L.) seed crops with the application of trinexapac-ethyl, a gibberellic acid biosynthesis inhibiting plant growth regulator (PGR) and lodging-control...
Resource Type:: Masters Thesis
Full Text:: (Trifolium incarnatum L.) Seed Yield and Seed Yield Components AN ABSTRACT OF THE THESIS OF

ScholarsArchive@OSU

Fish and invertebrate distribution at multiple scales in Thomas Creek, Oregon : a transition from conifer uplands to agricultural lowlands

A georeferenced digital image analysis of micro-topographic patterns within the Willamette Floodplain Research Natural Area, W. L. Finley National Wildlife Refuge

Nature in chains : the effects of Thomas Jefferson’s rectangular survey on a Pacific Northwest landscape

Comparing Himalayan blackberry (Rubus armeniacus) management techniques in upland prairie communities of the W.L. Finley National Wildlife Refuge

Spring nitrogen and cultivar effects on winter canola (Brassica napus L.) production in western Oregon

Spring irrigation management of perennial ryegrass (Lolium perenne L.) seed production

Applied nitrogen effects on yellow mustard (Sinapis alba L.) production in the Willamette Valley

College persistence stories of low income, first-generation students

Trinexapac-ethyl and open-field burning in creeping red fescue (Festuca rubra L.) seed production in the Willamette Valley

Trinexapac-ethyl timing and rate effects on crimson clover (Trifolium incarnatum L.) seed yield and seed yield components

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