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Gaussian elimination technique for solving the diffusion equation for moisture movement in unsaturated soil

Creator:: Ashcroft, Gaylen L.
Resource Type:: Dissertation
Full Text:: is presented May 15, 1962 Typed by Elaine T. Ashcroft Q ACKNOWLEDGMENTS The author is

The steady state flow of water through unsaturated soil in the low capillary potential region

Creator:: Stammers, William Norman
Abstract:: Several investigators have recently called attention to the fact that the flux equation for water movement in unsaturated soils may not be an appropriate mathematical model for the development of the theory of unsaturated flow phenomena. An analytical theory is developed for the purpose of testing the validity of the...
Resource Type:: Dissertation
Full Text:: ACKNOWLEDGMENTS The author is grateful for the advice given by Dr. Larry Boersma and Dr. D. D. Evans who have

Hydrophobicity of Cindery Typic Cryorthents

Creator:: Evans, Lynn B.
Abstract:: The hydrophobicity of soils of the Deschutes National Forest was studied. The soils are Cindery Typic Cryorthents, formed in cinders and ash from Mt. Mazama. Ponderosa pine is the dominant overstory vegetation. Of particular interest was the effect of prescribed burning on hydrophobicity. Fire has been shown to cause a...
Resource Type:: Masters Thesis
Full Text:: OF THE THESIS OF Lynn B. Evans for the degree of Master of Science in Soil Science presented on

Ozone inhibition of transpiration and photosynthesis of two soybean (Glycine max. [L.] Merr.) cultivars

Creator:: Yingjajaval, Suntaree
Resource Type:: Masters Thesis
Full Text:: should also like to thank Dr. D. T. Tingey for his contributions to the development of the experimental

Soil surface application of asphalt in afforestation in semi-arid zones of Iran

Creator:: Kowsar, Ahang
Resource Type:: Dissertation
Full Text:: advisors Dr. C. T. Youngberg, Dr. H. A. Froehlich, and Dr. J. W. Wolfe, and their willingness to serve as

Simulation and field validation of heat and water flow during soil freezing and thawing

Creator:: Pikul, Joseph Lawrence
Abstract:: Freeze/thaw cycles are numerous in agricultural soils of the Pacific Northwest. Potential loss of soil by erosion is high whenever a soil thaws from the surface creating a saturated soil overlying an impermeable frozen layer. Field studies were conducted to investigate the effect of surface residue on soil freezing. Residue...
Resource Type:: Dissertation
Full Text:: field investigations that led to this thesis. Finally, to my wife Connie and children Matthew and

Continuum mechanics methods applied to root growth and the penetration of soil by roots

Creator:: McCoy, Edward L.
Abstract:: The principles of continuum mechanics provide a consistent framework for the derivation of mathematical statements describing transport of water and solute, and growth in plant tissue. These derivations are based upon the explicit consideration of the tissue as a mathematical continuum composed of a cell wall matrix, water, and solute...
Resource Type:: Dissertation
Full Text:: (Geiger, 1979; Gifford and Evans, 1981; Ho and Baker, 1982). Consequently, the metabolic and

Soil physical conditions and nitrogen fixation of soybeans (Glycine max. Merrill, var. Chippewa 64)

Creator:: Kuo, Tsungmin
Abstract:: The effect of soil water suction and soil temperature on rates of transpiration, photosynthesis, respiration and nitrogen fixation of soybean (Glycine max. Merrill, var. Chippewa 64) seedlings was studied. A special apparatus was developed in which the soil water suction of several cells with soybeans growing in them could be...
Resource Type:: Masters Thesis
Full Text:: solution prepared with distilled water as used by Russell and Evans (37) and shown in Appendix 1. After a

Physiological effects of water stress on young corn plants

Creator:: Barlow, Edward William Ross
Abstract:: Laboratory experiments were used to investigate the mechanism of plant response to water stress by determining the sensitivity of leaf elongation, photosynthesis and transpiration in young corn plants to a decrease in leaf water potential. In initial experiments, 9 day old corn plants were grown at soil water potentials of...
Resource Type:: Dissertation
Full Text:: and Wareing, 1966; King, Ward law and Evans, 1967). These studies have led to a revival of interest

Soil water potential and soil temperature effects on growth and nutrient uptake of sudangrass seedlings (Sorghum vulgare var. Piper)

Creator:: Al-Omran, Abdrubalrasol Mosa
Resource Type:: Dissertation
Full Text:: .243 to .140 day -1 and for roots from .235 to .188 day -1 at T soil of 32°C. Optimum temperature

ScholarsArchive@OSU

Gaussian elimination technique for solving the diffusion equation for moisture movement in unsaturated soil

The steady state flow of water through unsaturated soil in the low capillary potential region

Hydrophobicity of Cindery Typic Cryorthents

Ozone inhibition of transpiration and photosynthesis of two soybean (Glycine max. [L.] Merr.) cultivars

Soil surface application of asphalt in afforestation in semi-arid zones of Iran

Simulation and field validation of heat and water flow during soil freezing and thawing

Continuum mechanics methods applied to root growth and the penetration of soil by roots

Soil physical conditions and nitrogen fixation of soybeans (Glycine max. Merrill, var. Chippewa 64)

Physiological effects of water stress on young corn plants

Soil water potential and soil temperature effects on growth and nutrient uptake of sudangrass seedlings (Sorghum vulgare var. Piper)

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