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Consolidation, compression, and shear strength of four western Oregon forest soils

Creator:: McNabb, David H.
Abstract:: Forest soils with low bulk densities are often considered less susceptible to compaction than soils with higher bulk densities. The objective of this study was to determine if soil strength controlled the compression of soils with low bulk density. Four soils were selected for this evaluation. Three of these were...
Resource Type:: Dissertation
Full Text:: of Four Western Oregon Forest Soils Redacted for Privacy Abstract approved: Larry Boersma Forest

Diffusion and surface reaction processes of absorption on surfaces of soil particles in unsaturated soils

Creator:: Yingjajaval, Suntaree
Abstract:: At present the adsorption kinetic of ions by soil particles is considered to be a surface reaction. When the transport of solutes in soils is described using the one-dimensional flow equation, it becomes a serious problem that lateral diffusion of ions from the bulk solution towards the soil surfaces is...
Resource Type:: Dissertation
Full Text:: opportunity of learning the art and philosophy of scientific researches. I am greatly thankful to Dr. Larry

Experimental analysis of subsurface heating and irrigation on the temperature and water content of soils

Creator:: Sepaskhah, Ali Reza
Abstract:: Multiple use of waste heat from power plants may become an important consideration in the development, siting, and certification of these plants. A multiple use system of components that can beneficially utilize waste heat may include home heating and cooling, greenhouses, animal enclosures, open basins for single cell protein production...
Resource Type:: Dissertation
Full Text:: OF SOILS Abstract approved: Larry Boersma Multiple use of waste heat from power plants may become

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:: Growth and the Penetration of Soil by Roots Abstract approved: Redacted for privacy Larry Boersma The

Dynamic mathematical model of oxygen and carbon dioxide exchange between soil and atmosphere

Creator:: Ou-yang, Ying
Abstract:: Gaseous transport through soil in the presence of soil microorganisms has been investigated. More recently, modeling of gaseous transport in the unsaturated zone has been investigated. However, the problem of mathematical model of oxygen and carbon dioxide transport through soil, as affected by the climatic conditions, the transport of soil...
Resource Type:: Dissertation
Full Text:: Larry boersma Gaseous transport through soil in the presence of soil microorganisms has been

Diffusion of oxygen and carbon dioxide through soil with temperature and water content effects on sink/source strength

Creator:: Ying, Ouyang
Abstract:: Gaseous diffusion equations which describe the diffusion of oxygen and carbon dioxide through soil have been studied by several investigators. However, these efforts seldom considered gaseous diffusion through soil together with the effects of soil environmental factors such as soil temperature and soil water content on sink or source strength....
Resource Type:: Masters Thesis
Full Text:: Strength 7 Redacted for Privacy Abstract approved: / Larry Boersma Gaseous diffusion equations which

Germination and emergence of corn (Zea mays, L) as a function of soil physical parameters

Creator:: Sanchez, Ramon M.
Abstract:: Rates of germination and emergence of corn were measured as influenced by soil physical parameters using blotter paper and a sandy loam soil as growth media. The corn seeds used were a hybrid of Funk's (DJ7xLH93). Experimental conditions were soil temperature of 20°C, 25°C, 30°C, and 35°C, soil water potential...
Resource Type:: Masters Thesis
Full Text:: ,4:. Larry Boersma Rates of germination and emergence of corn were measured as influenced by soil

A continuum model of plant root growth

Creator:: Feng, Yongsheng
Abstract:: The continuum theory provides a framework in which the growth of a plant root as a dynamic process involving interactions among transport of water and solute, cell division, and the subsequent cell elongation can be described. A plant root is modeled as a one-dimensional, multi-phase, mathematical continuum. The network of...
Resource Type:: Dissertation
Full Text:: ACKNOWLEDGEMENTS I, would like to express my deep appreciation to Dr. Larry Boersma for his support

Translocation of photosynthates in soybeans (Glycine Max. (L) Merr. cv. Wilkin) as affected by soil water potential and soil temperature

Creator:: Ekasingh, Methi
Resource Type:: Dissertation
Full Text:: Soil Water Potential and Soil Temperature Abstract approved: Redacted for privacy / Larry Boersma

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 guidance so generously given by Dr. Larry Boersma throughout my graduate studies at Oregon State

ScholarsArchive@OSU

Consolidation, compression, and shear strength of four western Oregon forest soils

Diffusion and surface reaction processes of absorption on surfaces of soil particles in unsaturated soils

Experimental analysis of subsurface heating and irrigation on the temperature and water content of soils

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

Dynamic mathematical model of oxygen and carbon dioxide exchange between soil and atmosphere

Diffusion of oxygen and carbon dioxide through soil with temperature and water content effects on sink/source strength

Germination and emergence of corn (Zea mays, L) as a function of soil physical parameters

A continuum model of plant root growth

Translocation of photosynthates in soybeans (Glycine Max. (L) Merr. cv. Wilkin) as affected by soil water potential and soil temperature

Physiological effects of water stress on young corn plants

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