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Fertilizer nitrogen use efficiency by winter wheat in the Willamette Valley

Creator:: Kjelgren, Roger Keith
Abstract:: Efficiency of nitrogen fertilizer uptake by soft white winter wheat (Triticum aestivum L.) was measured over two cropping seasons across a range of soils and cropping histories in the Willamette Valley. Fate and potential losses of applied nitrogen were also assessed over a seventeen month period. In both cropping seasons,...
Resource Type:: Masters Thesis
Full Text:: winter of the second cropping season. NUE by winter wheat in the Willamette Valley appears to be higher

The effect of seeding time on the heading and yield of wheat in the Willamette Valley

Creator:: al-Falahi, Tariq Salih
Abstract:: Wheat is an important cereal crop in the Willamette Valley of Oregon and the stiff-strawed, high yielding winter varieties are the predominate types grown although spring varieties are not uncommon. Because of the mild, often open winters; present in the Willamette, it is not unusual to be able to seed...
Resource Type:: Masters Thesis
Full Text:: wheat in the Willamette Valley AN ABSTRACT OF THE THESIS OF Tariq Salih Al- Falahi for the M. S. in

The response of winter wheat to irrigation in the Willamette Valley

Creator:: Rossner, John Theodore
Abstract:: Some consideration has been given to the irrigation of winter wheat in the Willamette Valley of Oregon. This important crop has yielded quite well since the development and introduction of the stiff-strawed, semi-dwarf wheats, but, because of the usually dry early summers, it has been suggested that irrigation of winter...
Resource Type:: Masters Thesis
Full Text:: given to the irrigation of winter wheat in the Willamette Valley of Oregon. This important crop has

Nitrogen available to winter wheat as influenced by previous crop in a moist xeric environment

Creator:: Qureshi, Maqsood Hassan
Abstract:: Rotating wheat with other crops is a common practice in the Willamette Valley of western Oregon. Depending upon previous crop and soil type, current N fertilizer recommendations for wheat in the Willamette Valley vary widely. Excessive fertilizer poses environmental risk, whereas lower N inputs than required by the crop represent...
Resource Type:: Dissertation
Full Text:: . Christensen Rotating wheat with other crops is a common practice in the Willamette Valley of western Oregon

Specificity of quantitatively expressed host resistance to Mycosphaerella graminicola

Creator:: Krenz, Jennifer E.
Abstract:: The specificity of quantitative host resistance to plant disease has long been a controversial issue. We examined interactions between wheat (Triticum aestivum) and Mycosphaerella graminicola, causal agent of Septoria tritici blotch, to determine whether specific interactions occur between host and pathogen genotypes that could be involved in eroding quantitatively expressed...
Resource Type:: Masters Thesis
Full Text:: eroded significantly in Willamette Valley, OR wheat fields, and Foote is a replacement cultivar

Assessment of impacts of Canada geese on wheat production

Creator:: Louhaichi, Mounir
Abstract:: Numbers of wild Canada geese (Branta canadensis) have increased dramatically during the past 30 years in the lower Columbia and Willamette Valley systems. The damage they cause by grazing and trampling plants can be substantial. The objectives of this research were to: 1) Develop methods that provide reliable estimates of...
Resource Type:: Masters Thesis
Full Text:: the past 30 years in the lower Columbia and Willamette Valley systems. The damage they cause by

Dynamics of Zymoseptoria tritici Fungicide Resistance in the Willamette Valley of Oregon

Creator:: Hagerty, Christina H.
Abstract:: The development of resistance to multiple fungicide classes is currently limiting disease management options for many pathogens, while the discovery of new fungicide classes has become less frequent. To address this pressing issue, a three-part study with different layers of complexity, objectives, and experimental approaches was conducted using the model...
Resource Type:: Dissertation
Full Text:: hierarchical survey of commercial wheat fields in the Willamette Valley of Oregon was executed to monitor

Historical Change and the Hydrogeomorphic Context of Present-day Floodplain Forests in the Willamette Valley, Oregon

Creator:: Bervid, Heather D.
Abstract:: Floodplain forests play many important roles in the fluvial processes and environments of large alluvial rivers, including acting as geomorphological influences and habitat for native fish during high flows. Many large, gravel-bed river systems have undergone substantial change in recent centuries, resulting in loss of forested area to agriculture, reduction...
Resource Type:: Masters Thesis
Full Text:: changes at the valley scale to provide context for modern Willamette River processes; 6

Willamette Valley farm woodlots

Creator:: Tyler, Charles
Resource Type:: Undergraduate Thesis
Full Text:: Willamette Valley farm woodlots Wilarnette Valley Farm

An evaluation of the potential for land use management as an air pollution control measure within the Willamette Valley

Creator:: Vinton, Larry Richard
Abstract:: The rapid population growth and related economic growth of the Willamette Valley has resulted in a significant reduction in air quality over the past several decades. Within the Willamette Valley air ventilation is very poor and therefore the airpo1lutton potential is one of the highest in the United States. There...
Resource Type:: Capstone Project
Full Text:: AIR POLLUTION CONTROL NEASURE WITHIN THE WILLAMETTE VALLEY by LARRY RICHARD VINTON A RESEARCH

ScholarsArchive@OSU

Fertilizer nitrogen use efficiency by winter wheat in the Willamette Valley

The effect of seeding time on the heading and yield of wheat in the Willamette Valley

The response of winter wheat to irrigation in the Willamette Valley

Nitrogen available to winter wheat as influenced by previous crop in a moist xeric environment

Specificity of quantitatively expressed host resistance to Mycosphaerella graminicola

Assessment of impacts of Canada geese on wheat production

Dynamics of Zymoseptoria tritici Fungicide Resistance in the Willamette Valley of Oregon

Historical Change and the Hydrogeomorphic Context of Present-day Floodplain Forests in the Willamette Valley, Oregon

Willamette Valley farm woodlots

An evaluation of the potential for land use management as an air pollution control measure within the Willamette Valley

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