Index Catalog // ScholarsArchive@OSU

Calculated and field-measured soil heat flux : a comparison under two soil water regimes

Creator:: Pikul, Joseph L.
Abstract:: Heat and water vapor flow in summer-fallowed fields in the Pacific Northwest may significantly affect the position and supply of water for germination of fall sown crops. New tillage tools and drill openers used in reduced tillage systems leave a trashy, residue covered surface in contrast to the traditional bare...
Resource Type:: Masters Thesis
Full Text:: moisture flow. Soil temperature responses to soil heat flow during the warm part of the season alter the

Duration of saturation and redox potentials in selected Willamette Valley soils

Creator:: Austin, Will
Resource Type:: Masters Thesis
Full Text:: of Saturation 2 Classifying Soil Moisture Conditions 4 Piezometers and Tensiometers 4 Reduction

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

Effect of elevation, aspect, canopy, and season on soil temperature measurements for soil classification

Creator:: Green, David L.
Abstract:: The effects of aspect, canopy, elevation, and season both singly and in combination on soil temperatures at 50 cm depths were evaluated. The objectives of the study were (i) to develop a standard procedure for obtaining soil temperature data adequate to classify soils at the family and great group levels,...
Resource Type:: Masters Thesis
Full Text:: Soil Temperature Measurement and Predictability 6 Environmental and Physical Factors Influencing

Water and solute transport : modeling and application to water conservation in layered soil

Creator:: Mohammed, Fareed H. A. N.
Abstract:: Sandy soils are among the least productive soils because of their inability to store adequate water for plant growth. Their high percolation rate not only allows water to move quickly beyond the root zone, but also washes nutrients below the reach of plant roots. High evaporation occurs from the soil...
Resource Type:: Dissertation
Full Text:: potential. The soil water potential is related to soil water content as illustrated in the soil moisture

Soil physical properties and available water capacity of southwest Oregon forest soils

Creator:: Flint, Alan L.
Abstract:: Measurements for water retention calculations and physical characterization were made on skeletal and non-skeletal soils in southwest Oregon. A new bulk density sampler was designed for the physical characterization of the steep, skeletal soils commonly encountered in this area. The new sampler and the techniques required for the measurement and...
Resource Type:: Masters Thesis
Full Text:: ABSTRACT A sampler was developed for measurement of both rock fragment content and soil bulk density. The

Effects of Initial Moisture and Surface Properties on Sorptivity of Coarse Soil and Sand

Creator:: Ambrowiak, Gloria M.
Abstract:: Many different models and mechanisms of water imbibition into soil have been described in the literature. Theoretical equations based on those models exist to predict how water will flow in porous media. These models can be useful, but have their weaknesses. Research on imbibition and infiltration into soils has mostly...
Resource Type:: Masters Thesis

Leaf elongation as a function of soil water potential and photoperiod

Creator:: Hodges, T.
Abstract:: Leaf elongation is a major indicator of plant growth. It is controlled by complex interactions of many factors including light intensity, photoperiod, water availability, atmospheric conditions, and plant water stress. In this study, the response of leaf elongation to length of photoperiod and to plant water stress as indicated by...
Resource Type:: Masters Thesis
Full Text:: MASTER OF SCIENCE (Name) (Degree) in SOIL SCIENCE (Major Department) presented on June 14, 1974 (Date

Exploring mechanisms that drive the development of reversible soil hydrophobicity

Creator:: Woolverton, Priscilla B.
Abstract:: This study focuses on one widespread characteristic of poor soil quality: hydrophobic soil. Previous research has produced conclusive evidence to show that soil hydrophobicity is affected by soil organic matter (SOM) and soil water content (WC). Hydrophobicity that responds to changes in WC is a unique form of surface hydrophobicity...
Resource Type:: Masters Thesis
Full Text:: measurement of wettability and soil organic matter characterization...................................... 24

Nitrate and water under terraced dryland wheat production in Oregon

Creator:: Strock, Jeffrey S.
Abstract:: Dry land agriculture using summer fallow is a common crop production practice in the Columbia Plateau region of eastern Oregon. Farmed-over level terraces are used to control surface water runoff and soil erosion. More than 70 percent of the average annual precipitation around Pendleton, Oregon (350 - 400 mm) falls...
Resource Type:: Masters Thesis
Full Text:: MATERIALS AND METHODS 30 Location 30 Measurements 31 Soil sampling 31 Soil moisture content 32

ScholarsArchive@OSU

Calculated and field-measured soil heat flux : a comparison under two soil water regimes

Duration of saturation and redox potentials in selected Willamette Valley soils

Water and anion movement in selected soils of western Oregon

Effect of elevation, aspect, canopy, and season on soil temperature measurements for soil classification

Water and solute transport : modeling and application to water conservation in layered soil

Soil physical properties and available water capacity of southwest Oregon forest soils

Effects of Initial Moisture and Surface Properties on Sorptivity of Coarse Soil and Sand

Leaf elongation as a function of soil water potential and photoperiod

Exploring mechanisms that drive the development of reversible soil hydrophobicity

Nitrate and water under terraced dryland wheat production in Oregon

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