Search Constraints

Start Over
Filtering by: Creator Paulson, C. A. Remove constraint Creator: Paulson, C. A. Location Willamette Valley, Oregon, United States, (Hypsographic) Remove constraint Location: Willamette Valley, Oregon, United States, (Hypsographic)

Search Results

  • 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:
    ). .................................................................................................................................... 92 Figure 4.2: Alder characters; leaf (A), valvate bud (B), woody infructescences (C), and male

  • 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:
    geomorphic floodplain near a) Luckiamute State Natural Area and b) Harkens Lake. Plot c) quantifies acres

  • “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:
    : ______________________________________________________ Joan E. Gross This thesis investigates how beginning, women farmers, within in a women

  • 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:
    . ............................................................................................................ 36 2.10 Changes in percent lignin (a), cellulose (b), and hemi-cellulose (c) in canola residue

  • 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:
    (Cucumis melo) exhibited the highest disease severities. A few winter squash (C. maxima) cultivars (e.g

  • 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:
    . Abstract approved: __________________________________________________________________ Richard A

  • 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
    Full Text:
    13 18 20 A-1 B-1 C-1 Choices for the Future • PAGE 1 Introduction Introduction Introduction

  • 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:
    prehistoric Settlement and Subsistence Patterns References Cited APPENDIX A: APPENDIX B: APPENDIX C

  • 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:
    ti!m and st,rtlons as majo r determinant in in- dustrial/commerci a l loc atio n . .Mote c~rs