Index Catalog // ScholarsArchive@OSU

Drivers of arbuscular mycorrhizal fungal community composition in roots : hosts, neighbors, and environment

Creator:: Phillips, Wendy S.
Abstract:: The vast majority of terrestrial plant species live in symbiosis with arbuscular mycorrhizal fungi (AMF). AMF and plants live in complex networks, with roots of individual plants hosting multiple AMF, and single AMF colonizing multiple plants concurrently. Through the exchange of resources, the two partners of this symbiosis can have...
Resource Type:: Dissertation
Full Text:: , in the Willamette Valley, Oregon, U.S.A. For my first study (Chapter 2), I conducted a field survey

Synecology of the white-oak (Quercus garryana Douglas) woodlands of the Willamette Valley, Oregon

Creator:: Thilenius, John F., 1931-
Abstract:: Quercus garryana dominated plant communities are found in the interior coastal valleys and on foothills from southeastern Vancouver Island, British Columbia, south to San Francisco, California. They occur as savannas, intermixed with a variety of conifers, and in almost pure stands. The diversity of habitats occupied by the species and...
Resource Type:: Dissertation
Full Text:: ) woodlands of the Willamette valley, Oregon AN ABSTRACT OF THE THESIS OF JOHN FREDRICK THILENIUS for the

Potential impacts of canola (Brassica napus L.) on vegetable seed production in the Willamette Valley of Oregon

Creator:: Quinn, Michael P.
Abstract:: In the Willamette Valley of Oregon, a combination of the need for rotational crops and an increased desire for biofuel production created interest in planting Brassica napus (canola). However, questions were raised arisen over the potential damage canola production could have on the preexisting Brassica vegetable seed industry. To address...
Resource Type:: Dissertation
Full Text:: POTENTIAL IN THE WILLAMETTE VALLEY OF OREGON ............................................ ...... ..41

Responses and relationships among Fusarium species, sweet corn, and western spotted cucumber beetles

Creator:: Miller, Nathan L. (Nathan Louis)
Abstract:: Sweet corn (Zea mays L.) yields in the Willamette Valley of Oregon have been declining since the early 1990’s. Studies were done to determine if there is a relationship between ear weight and several disease parameters including necrotic crowns or stalk nodes, nodal root rot, radicle root rot, and sub-crown...
Resource Type:: Dissertation
Full Text:: (Zea mays L.) yields in the Willamette Valley of Oregon have been declining since the early 1990’s

Sweet corn decline syndrome in Oregon's Willamette Valley

Creator:: Hoinacki, Elisabeth V.
Abstract:: For the past several years vegetable growers in Oregon's Willamette Valley have experienced reduced yields in their sweet corn plantings. We conducted studies to 1) describe the symptomology and etiology of the disease, 2) test a root rot rating system we developed to evaluate factors in the disease syndrome, and...
Resource Type:: Dissertation
Full Text:: Oregon's Willamette Valley by Elisabeth V. Hoinacki A DISSERTATION submitted to Oregon State University

Extraction and plant availability of cadmium and zinc in a Willamette sandy loam soil

Creator:: Halvorson, Gary Alfred
Abstract:: A Willamette sandy shot loam was treated with ZnC1₂, CdC1₂, or sewage sludge to determine the chemical fate of added Cd and Zn in the soil and their influence on the growth of corn and wheat seedlings. Cadmium was added as CdC1₂ at rates of 0, 5, 20, or 80...
Resource Type:: Dissertation
Full Text:: WILLAMETTE SANDY LOAM SOIL by Gary Alfred Halvorson A THESIS Submitted to Oregon State University in

Oregon's Mid-Willamette Valley wetlands : agricultural uses, alternative uses, problems and trends

Creator:: Tsutsui, Setsuo Harry
Abstract:: The wetlands are distinguished from other lands of the Mid-Willamette Valley by excessive soil moisture. The wetlands, as defined for this study, consist of 20 soil series (in 22 soil mapping units) which are classified by the Soil Conservation Service as having excessive wetness as the major factor limiting their...
Resource Type:: Dissertation
Full Text:: Basin Wetlands of the Five-County Area, Mid- Willamette Valley, Oregon Page 6 7 3 Climograph of

A test of the differentiation of soil series within the Willamette catena

Creator:: Pomerening, James A.
Resource Type:: Dissertation
Full Text:: northwestern Oregon. The Willamette Valley is about 125 miles long and from 15 to 40 miles wide. It is

Response of Roughstalk Bluegrass (Poa trivialis L.) to Waterlogging Stress

Creator:: Liu, Mingyang
Abstract:: Roughstalk bluegrass (Poa trivialis L.) (RB) is a weed species that increased very quickly in grass seed production fields of the Willamette Valley. The invasion of RB in grass seed crops often occurs in waterlogged soils. In waterlogged areas, RB exhibited better competitiveness and had greater population densities than other...
Resource Type:: Dissertation
Full Text:: ..................................................................................1 Grass seed production in Oregon and Willamette Valley ..................................1 Poa

The effects of land use on mineral flat wetland hydrologic processes in lowland agricultural catchments

Creator:: Marshall, Sarah M.
Abstract:: Hydrologic processes within mineral flat wetlands, along with their connections to groundwater and downstream surface water in lowland agricultural catchments are poorly understood, particularly under different land uses. In the three field studies included in this thesis, we examined infiltration, wetland hydroperiod, groundwater recharge dynamics, surface runoff generation, and water...
Resource Type:: Dissertation
Full Text:: Atlantic Coastal Plain and wetland prairie in the Willamette Valley, Oregon, are now some of the rarest

ScholarsArchive@OSU

Drivers of arbuscular mycorrhizal fungal community composition in roots : hosts, neighbors, and environment

Synecology of the white-oak (Quercus garryana Douglas) woodlands of the Willamette Valley, Oregon

Potential impacts of canola (Brassica napus L.) on vegetable seed production in the Willamette Valley of Oregon

Responses and relationships among Fusarium species, sweet corn, and western spotted cucumber beetles

Sweet corn decline syndrome in Oregon's Willamette Valley

Extraction and plant availability of cadmium and zinc in a Willamette sandy loam soil

Oregon's Mid-Willamette Valley wetlands : agricultural uses, alternative uses, problems and trends

A test of the differentiation of soil series within the Willamette catena

Response of Roughstalk Bluegrass (Poa trivialis L.) to Waterlogging Stress

The effects of land use on mineral flat wetland hydrologic processes in lowland agricultural catchments

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