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Diagnosis and Etiology of a Soilborne Disease Complex of Winter Squash (Cucurbita maxima) in the Willamette Valley, OR

Creator:: Rivedal, Hannah M.
Abstract:: Winter squash (Cucurbita maxima) grown in Oregon’s Willamette Valley for edible seed, frozen foods, and fresh markets is susceptible to an undiagnosed soilborne disease. Diseased squash fields exhibit symptoms of stunting, root and crown rot, vascular discoloration, and late-season wilt, which in extreme cases can lead to total crop failure....
Resource Type:: Dissertation
Full Text:: . oxysporum, P. cucumerina, and S. terrestris. Some treatments of mixed species inoculum produced symptoms

White-breasted nuthatch density and nesting ecology in oak woodlands of the Willamette Valley, Oregon

Creator:: Viste-Sparkman, Karen
Abstract:: Habitat loss causes a reduction in available resources for wildlife, alters the configuration of remaining habitat, and may isolate wildlife populations. White-breasted nuthatches (Sitta carolinensis) are experiencing long-term population declines in the Willamette Valley of Oregon, where they are historically associated with oak woodlands. As secondary cavity-nesters, white-breasted nuthatches may...
Resource Type:: Masters Thesis
Full Text:: ____________________________________________________________ Dean of the Graduate School I understand that my thesis will become part

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:: Geology Dean of the College of Earth, Ocean, and Atmospheric Sciences Dean

Decomposition of Brassicaceae Residue in the Willamette Valley

Creator:: Berry, Pete A.
Abstract:: An important inoculum source of Leptosphaeria maculans and L. biglobosa (syn Plenodomus spp.), the pathogens that cause black leg in Brassicaceae crops, is infected plant residues. The general acceptance of conservation tillage in the Willamette Valley, Oregon, USA, has enabled a build-up in the amount of residue on or near...
Resource Type:: Dissertation
Full Text:: Science Head of the Department of Crop and Soil Science Dean of the

Landscape Genomics and Climatic Responses of Willamette Valley Alders

Creator:: Kral, George L.
Abstract:: The climate of the Pacific Northwest is in flux, and existing forest ecosystems are stressed and poised to shift in fundamental ways, with or without human intervention. This dissertation probes the nature of forest responses to environmental change through investigations of morphology and genetics of three species of alder co-occurring...
Resource Type:: Dissertation
Full Text:: Plant Pathology Head of the Department of Botany and Plant Pathology Dean of the

Subsistence variability in the Willamette Valley

Creator:: Havercroft, Francine M.
Abstract:: During the summer of 1981, Oregon State University archaeologically tested three prehistoric sites on the William L. Finley National Wildlife Refuge. Among the sites tested were typical Willamette Valley floodplain and adjacent upland sites. Most settlement-subsistence pattern models proposed for the Willamette Valley have been generated with data from the...
Resource Type:: Masters Thesis
Full Text:: department of Anthropology Dean of Graduate School Date thesis is presented June 16, 1986 Typed by Ellinor

“Gold Dirt:” An Exploratory Study of Beginner Women Farmers’ Experiences with Farmland Tenure Mediating Care for Soil in Willamette Valley, Oregon

Creator:: Christophel Michaels, Rosa J.
Abstract:: This thesis investigates how beginning, women farmers, within in a women farmers’ network in the Willamette Valley, Oregon are accessing land and farming information. Using ethnographic, community-based research methods, I ask how land access mediates their ability to care for their land and soil. Are these farmers interested in fostering...
Resource Type:: Masters Thesis
Full Text:: Director of the School of Language, Culture, and Society Dean of the Graduate School

Choices for the future: The Willamette Valley

Creator:: The Willamette Valley Livability Forum
Abstract:: Prepared for by the Willamette Valley Livability Forum. May 1999.
Resource Type:: Technical Report

ScholarsArchive@OSU

Diagnosis and Etiology of a Soilborne Disease Complex of Winter Squash (Cucurbita maxima) in the Willamette Valley, OR

White-breasted nuthatch density and nesting ecology in oak woodlands of the Willamette Valley, Oregon

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

Decomposition of Brassicaceae Residue in the Willamette Valley

Landscape Genomics and Climatic Responses of Willamette Valley Alders

Subsistence variability in the Willamette Valley

“Gold Dirt:” An Exploratory Study of Beginner Women Farmers’ Experiences with Farmland Tenure Mediating Care for Soil in Willamette Valley, Oregon

Choices for the future: The Willamette Valley

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