Index Catalog // ScholarsArchive@OSU

The effects of site preparation on native forb establishment in a wet prairie, Willamette Valley, Oregon

Creator:: Norman, Katherine N.
Abstract:: Wetlands and wet prairies are economically and environmentally valuable ecosystems, but many have been degraded or converted to other uses. As human understanding of wetlands' value has increased, restoration efforts have grown correspondingly. Restoration attempts use a diversity of methods, which often include seeding with native plant species. This thesis...
Resource Type:: Masters Thesis
Full Text:: Establishment in a Wet Prairie, Willamette Valley, Oregon Abstract approved: Patricia S. Muir

The Forest Field Program : a case study in forest education for Latino youth

Creator:: Gonzalez, Emily A.
Abstract:: This study involved the development of two bilingual and inquiry-based forest education programs within the Central Willamette Valley of Oregon. The first program used the participatory research (PR) process to engage 7th and 8th grade Latino students as participatory researchers to interview members of their community to learn their perspectives...
Resource Type:: Masters Thesis
Full Text:: education programs within the Central Willamette Valley of Oregon. The first program used the

Linkages among land use, riparian zones, and uptake and transformation of nitrate in stream ecosystems

Creator:: Sobota, Daniel J.
Abstract:: Land use alters the physical and biological structure of stream ecosystems and potentially alters their capacity to process nitrogen (N), an essential nutrient that has nearly doubled in abundance on the biosphere during the past century from human activities. In this dissertation, I quantified uptake and transformation of nitrate (NO₃⁻)...
Resource Type:: Dissertation
Full Text:: Table 1. Physiographic setting and land use cover of the nine study reaches in the Willamette River

Cover crop effects on root rot of sweet corn and soil properties

Creator:: Miyazoe, Mikio
Abstract:: Root rot of sweet corn in western Oregon and Washington is a significant disease that can reduce yield of intolerant cultivars of processed sweet corn by fifty percent. Root rot is caused by a complex of soilborne organisms, including Drechslera sp., Phoma terrestris, and Pythium arrhenomanes. Processors have adopted tolerant...
Resource Type:: Masters Thesis
Full Text:: production Processed sweet corn growers in Willamette Valley of Oregon experienced yield reductions in

Functional groups, traits, and the performance of species in restoration

Creator:: Roberts, Rachael E. (Rachael Elaine)
Abstract:: In ecological restoration, species that are sown to increase the native plant diversity range in establishment ability. Some species readily establish, while others rarely do. This study set out to investigate some of the potential processes influencing species establishment, as well as the traits that are associated with the success...
Resource Type:: Masters Thesis
Full Text:: this study, native to upland prairies in the Willamette Valley of Oregon

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

Dissolved nitrogen in surface waters and nitrogen mineralization in riparian soils within a multi-land use basin

Creator:: Evans, Daniel M.
Abstract:: The growing population of Oregon’s Willamette River Basin places an increasing demand on the basin’s surface waters. Watershed-scale research addressing spatial trends of dissolved nitrogen (DN) and its relationship with landuse and soil N dynamics, such as N mineralization, is sparse in the Willamette Basin. I measured DN along 124...
Resource Type:: Masters Thesis
Full Text:: Multi-Land Use Basin 2.0 Abstract The growing population of Oregon’s Willamette River Basin

Glyphosate-resistance in Italian ryegrass (Lolium multiflorum): evaluation and investigation of the mechanisms of resistance

Creator:: Perez-Jones, Alejandro
Abstract:: A suspected glyphosate-resistant Italian ryegrass (Lolium multiflorum) (OR) population was collected from a filbert (Corylus avellana L.) orchard near Portland, OR. Based on the dose-response experiments conducted in the greenhouse, it was found that the suspected glyphosate-resistant population was approximately fivefold more resistant to glyphosate than the susceptible (S) population....
Resource Type:: Dissertation
Full Text:: susceptible Italian ryegrass biotype collected in the Willamette Valley, OR, was included as a control

Using rootstocks to manipulate vine physiological performance and mediate changes in fruit and wine composition

Creator:: Sampaio, Tiago Luís Barros
Abstract:: A rootstock trial was established in 1997 at the OSU Woodhall vineyard, located in the Southern Willamette Valley, which included two experiments. The first experiment was a factorial of four varieties grafted on to 9 rootstocks, and also as ungrafted vines (a split-plot design). The second experiment was a randomized...
Resource Type:: Dissertation
Full Text:: , located in the Southern Willamette Valley, which included two experiments. The first experiment was a

Plant community dynamics in remnant and restored Willamette Valley wetland prairies

Creator:: Schwindt, Rachel A.
Abstract:: Invasion by exotic species can pose a major challenge for developing native plant communities in wetland restoration projects. Often native plant communities do not develop as anticipated in restored wetlands due to colonization by exotic species that dominate the native plant community. Despite the time and expense to restore wetlands,...
Resource Type:: Masters Thesis
Full Text:: Willamette Valley in Oregon to determine if exotic species abundance was consistent between these groups

ScholarsArchive@OSU

The effects of site preparation on native forb establishment in a wet prairie, Willamette Valley, Oregon

The Forest Field Program : a case study in forest education for Latino youth

Linkages among land use, riparian zones, and uptake and transformation of nitrate in stream ecosystems

Cover crop effects on root rot of sweet corn and soil properties

Functional groups, traits, and the performance of species in restoration

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

Dissolved nitrogen in surface waters and nitrogen mineralization in riparian soils within a multi-land use basin

Glyphosate-resistance in Italian ryegrass (Lolium multiflorum): evaluation and investigation of the mechanisms of resistance

Using rootstocks to manipulate vine physiological performance and mediate changes in fruit and wine composition

Plant community dynamics in remnant and restored Willamette Valley wetland prairies

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