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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:: THE DISSERTATION OF Hannah M. Rivedal for the degree of Doctor of Philosophy in Botany and Plant

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:: ABSTRACT OF THE THESIS OF Francine M. Havercroft for the degree of Master of Arts in Interdisciplinary

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:: . ..................................................................................... 23 2.5 Comparison of k-values of forage rape, canola, and turnip after 12 months

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:: sample. Columns are mass-to-charge ratio (m/z

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:: measured at a 178-m radius (home range) scale, and landscape context was measured using vegetation cover

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:: indicate partial submergence of restoration forests by at least 1 m depth of restoration forests at both

The Willamette Valley choices for the future

Creator:: Lawrence Halprin & Associates
Abstract:: This book is an environmental primer for the people of the Willamette Valley. It sets forth basic principles showing how men's actions cause future consequences in the environment.
Resource Type:: Book
Full Text:: WILL.A-METTE ,, k . • ·. . ·,:~ ICES FOll THE VALLEY

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

Subsistence variability in the Willamette Valley

Decomposition of Brassicaceae Residue in the Willamette Valley

Landscape Genomics and Climatic Responses of Willamette Valley Alders

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

The Willamette Valley choices for the future

Choices for the future: The Willamette Valley

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