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Investigations of soil morphology, hydrology, reduction-oxidation potentials, and stratigraphy on a selected hillslope in western Oregon

Creator:: Verble, Kathy K.
Abstract:: Hydric soils are defined through the hydric soil definition, and a means to identify hydric soils has been established through hydric soil criteria and Field Indicators of Hydric Soils in the U.S. However, the field indicators are a recent development that requires more research and testing to increase our knowledge...
Resource Type:: Masters Thesis
Full Text:: Corvallis, Oregon. Hydrologic, redox potential, and soil temperature data provided documentation that the

The mineralogy and morphology of loess derived soils along a traverse in northeastern Oregon

Creator:: Berggren, Brad J.
Abstract:: The lentil strain of pea seedborne mosaic virus, PSbMV-L, was distinguished from the standard isolates of PSbMV by a natural inoculum reservoir in lentil seed and by separate resistance genes in Pisum and Lens. PSbMV-L was intermediate in symptom severity between the standard and New Zealand isolates of PSbMV. Seed...
Resource Type:: Masters Thesis
Full Text:: Mosaic Virus by Jody Jellison Goodell A THESIS submitted to Oregon State University in partial

Effects of tillage systems on nitrate-nitrogen accumulation and soil structure

Creator:: Avcin, Abdulkadir
Abstract:: Effects of different tillage systems on nitrate-nitrogen accumulation in a 120 cm profile and on soil structure in the top 30 cm of the profile were studied under a fallow-wheat rotation. Treatment effects on nitrate-nitrogen, soil moisture and soil aggregation were measured. Fallow tillage treatments consisting of bare fallow, stubble-mulch...
Resource Type:: Masters Thesis
Full Text:: ACCUMULATION AND SOIL STRUCTURE by Abdulkadir Avcin A THESIS submitted to Oregon State University in

Plot-Scale Field Investigation : Characterizing Water Motion in Sandy Agricultural Soils

Creator:: Nolasco, Stephanie M.
Abstract:: Irrigated agricultural production in sandy soils presents several unique challenges to growers, including naturally high permeability, low native water retention, as well as high rates of water drainage losses and leaching of chemicals to the shallow aquifers. This study is an initial investigation into water motion in the sandy agricultural...
Resource Type:: Masters Thesis
Full Text:: Umatilla Basin in Morrow County, Oregon (Appendix A). A large portion of this area is Quincy soil

Bearing capacity and immediate settlement of shallow foundations on clay

Creator:: Strahler, Andrew W.
Abstract:: Shallow foundations are extensively used to support structures of all sizes and derive their support from near surface soils. Thus, they are typically embedded up to a few meters into the soil profile. Designers of shallow foundations are required to meet two limit states: overall failure of the soil beneath...
Resource Type:: Masters Thesis
Full Text:: , they are typically embedded up to a few meters into the soil profile. Designers of shallow

Soil-bridge interaction during long-duration earthquake motions

Creator:: Romney, Kyle T.
Abstract:: Earthquake engineering analyses are often performed using shallow, crustal earthquake motions (e.g., 1940 El Centro). However, large areas of the world are subject to subduction zone earthquake motions (e.g., the Pacific Northwest). A subduction zone earthquake motion is characterized by its long duration (e.g., strong shaking lasts for more than...
Resource Type:: Masters Thesis
Full Text:: -structure interaction . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.3 Soil-bridge interaction

Nature of interlayer material in silicate clays of selected Oregon soils

Creator:: Singleton, P. C.
Abstract:: A study was conducted to investigate the nature of hydroxy interlayers in the chlorite-like intergrade clays of three Oregon soils with respect to kind, amount, stability, and conditions of formation. The clays of the Hembre, Wren, and Lookout soils, selected to represent weathering products originating from basaltic materials under humid,...
Resource Type:: Dissertation
Full Text:: . Oregon researchers have indicated that the presence of inter - grade clay in soil samples may lead to

Cation retention and solute transport related to porosity of pumiceous soils

Creator:: Doak, William Herman, 1941-
Abstract:: Previous studies of pumiceous soils in Oregon indicated that their physical and chemical properties were strongly related to the porous nature of the pumice matrix. Soils developed on air-fall pumice from the eruption of Mt. Mazama (Crater Lake, Oregon) had low thermal conductivities and low volumetric heat capacities. Values for...
Resource Type:: Dissertation
Full Text:: Oregon should reflect these soil chemical and physical properties . Cation Retention and Solute

Water and anion movement in selected soils of western Oregon

Creator:: Hammermeister, Dale P.
Abstract:: Experiments were carried out to study the movement of water and halide anions in perched water tables or saturated zones in the soil and upper rock mantle of eight different experimental sites located on low hills near the western border of the Willamette Valley. At each site the experimental procedure...
Resource Type:: Dissertation
Full Text:: Oregon AN ABSTRACT OF THE THESIS OF Dale Hammermeister for the degree of Doctor of Philosophy in Soil

Morphology and genesis of the Condon, Morrow, and Walla Walla series of the Mid-Columbia basin, Oregon

Creator:: Douglass, John Franklin
Resource Type:: Dissertation

ScholarsArchive@OSU

Investigations of soil morphology, hydrology, reduction-oxidation potentials, and stratigraphy on a selected hillslope in western Oregon

The mineralogy and morphology of loess derived soils along a traverse in northeastern Oregon

Effects of tillage systems on nitrate-nitrogen accumulation and soil structure

Plot-Scale Field Investigation : Characterizing Water Motion in Sandy Agricultural Soils

Bearing capacity and immediate settlement of shallow foundations on clay

Soil-bridge interaction during long-duration earthquake motions

Nature of interlayer material in silicate clays of selected Oregon soils

Cation retention and solute transport related to porosity of pumiceous soils

Water and anion movement in selected soils of western Oregon

Morphology and genesis of the Condon, Morrow, and Walla Walla series of the Mid-Columbia basin, Oregon

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