Index Catalog // ScholarsArchive@OSU

Resistance development in pear psylla populations to pyrethroid insecticides in Oregon's Hood River Valley

Creator:: Riedl, Helmut W. and Shearer, Peter W.
Resource Type:: Conference Proceeding
Full Text:: Agricultural Research & Extension Center 3005 Experiment Station Drive Hood River, OR 97031 RESISTANCE

Frequency of benomyl resistant isolates of Botrytis cinerea associated with gray mold of wild blackberry in the Willamette Valley of Oregon

Creator:: Johnson, K. B. and Theiling, K. M.
Resource Type:: Conference Proceeding
Full Text:: and Plant Pathology Oregon State University, Corvallis, OR 97331-2902. Frequency of benomyl

Danebo Wetland Prairie Project Environmental Education Curriculum

Creator:: Windham, George, Wagner, Jan, Ruzicka, Angela, Clark, Deborah Louise, 1950-, Wilson, Mark V., and Lederman, Norman
Abstract:: One goal of this environmental education curriculum is that students will gain an appreciation of Willamette Valley wetland prairies, a threatened ecosystem, and will gain an understanding of the importance of protecting these wetlands. A second goal is that students will see first-hand the processes involved in conducting scientific field...
Resource Type:: Other
Full Text:: Eugene School District Eugene, OR and Deborah Clark Mark V. Wilson Norman Lederman Oregon State

Regeneration biology of Erigeron decumbens var. decumbens, an endangered plant of the Willamette Valley

Creator:: Clark, Deborah Louise, 1950-, Finley, Karen K., and Ingersoll, Cheryl A.
Abstract:: Erigeron decumbens var. decumbens, the Willamette daisy, is known only from the Willamette Valley of Oregon. Herbarium records, from the 1800's until 1934, indicate that the Willamette daisy was once common and widely distributed throughout the Willamette Valley (Clark et al. 1993). However, between 1934 and 1980, this taxon was...
Resource Type:: Technical Report
Full Text:: (Clark et al. 1993). However, between 1934 and 1980, this taxon was not observed or collected and was

West Eugene Native Wetland Restoration Research Project: Seed Dormancy, Germination, and Establishment

Creator:: Wilson, Mark V., Ingersoll, Cheryl A., and Clark, Deborah Louise, 1950-
Abstract:: Seed size, abundance, viability, dormancy, and germination requirements strongly influence plant establishment and therefore are important considerations in restoration of native vegetation. These characteristics provide criteria for selection of suitable species, development of collection and pretreatment methods, and determination of seeding densities. The first set of objectives of this study...
Resource Type:: Technical Report
Full Text:: Mark V. Wilson, Cheryl A. IngersolIr. and Deborah L. Clark Oregon State University Corvallis, Oregon

Peavy Arboretum : an archaeological and historical investigation of a Willamette Valley landscape

Creator:: Hylton, Lindon B.
Abstract:: This thesis documents a period of ecological and cultural change on a Willamette Valley, Oregon landscape. In particular, this study examines the Peavy Arboretum area and the cultural changes that accompanied the transformation of the landscape from an oak savannah in the mid-nineteenth century to a dense Douglas-fir forest in...
Resource Type:: Masters Thesis
Full Text:: Interdisciplinary Studies thesis of Lindon B. Hylton presented on December 11, 1998 APPROVED: Major Prof or

Geochemical characteristics of iron-manganese nodules in seasonally-saturated soils of the Willamette Valley, Oregon

Creator:: Seter, Lisa M.
Abstract:: This study was initiated to characterize the distribution of Fe-Mn nodules and to elucidate trends of Fe, Mn, and P relative to the intensity of the annual cycles of reduction and oxidation. Nodules were enriched in Fe, Mn, and P relative to the soil matrix making them an integral part...
Resource Type:: Masters Thesis
Full Text:: nodules were found in horizons that were well-aerated or seasonally reduced. When overlain by horizons

Development of a GIS for the Marys River Watershed for fish and wildlife analysis

Creator:: Callahan, Brady
Abstract:: GIS technology has reached a point where it can be utilized by nonprofessionals in a desktop environment. This paper reviews the implementation of a pilot project for developing a localized-natural resource GIS. The resulting GIS was custom designed to answer questions posed by fish and wildlife biologists who need to...
Resource Type:: Capstone Project
Full Text:: 24 Appendix B 25 Appendix C 26 Appendix D 27 2 Development of a GIS for the Marys River

Water quality modeling of the Tualatin River

Creator:: Berger, Christopher J. (Christopher John)
Abstract:: Water quality problems related to excessive algal growth, high nutrient loading, and low flows have been occurring along Oregon's Tualatin River. The Tualatin River is 86 miles long and has a drainage basin of 711 square miles. The drainage basin incorporates forest, agricultural, and urban areas. Located in the Portland...
Resource Type:: Technical Report

Spatial and temporal patterns of windthrow in the Bull Run Watershed, Oregon

Creator:: Sinton, Diana Stuart
Abstract:: Throughout the 20th century, windthrow has affected forests in the Bull Run watershed, a 26,500 ha basin that is the principal water source for the city of Portland, Oregon. Windthrow from storms in 1973 and 1983 was mapped into a geographic information system (GIS) and compared to a 1931 windthrow...
Resource Type:: Dissertation
Full Text:: or a process, can be investigated at a variety of spatial and temporal scales. Windthrow patterns

ScholarsArchive@OSU

Resistance development in pear psylla populations to pyrethroid insecticides in Oregon's Hood River Valley

Frequency of benomyl resistant isolates of Botrytis cinerea associated with gray mold of wild blackberry in the Willamette Valley of Oregon

Danebo Wetland Prairie Project Environmental Education Curriculum

Regeneration biology of Erigeron decumbens var. decumbens, an endangered plant of the Willamette Valley

West Eugene Native Wetland Restoration Research Project: Seed Dormancy, Germination, and Establishment

Peavy Arboretum : an archaeological and historical investigation of a Willamette Valley landscape

Geochemical characteristics of iron-manganese nodules in seasonally-saturated soils of the Willamette Valley, Oregon

Development of a GIS for the Marys River Watershed for fish and wildlife analysis

Water quality modeling of the Tualatin River

Spatial and temporal patterns of windthrow in the Bull Run Watershed, Oregon

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