Index Catalog // ScholarsArchive@OSU

Peppermint irrigation and nitrogen management for the reduction of nitrate loading to groundwater

Creator:: Smesrud, Jason K.
Abstract:: The agricultural production of peppermint has been shown to contribute significant quantities of nitrate-nitrogen to groundwater recharge. In an effort to provide new tools for increasing nitrogen efficiency within peppermint production, three research questions were proposed: i) How should plant tissue samples be collected to achieve the greatest precision when...
Resource Type:: Masters Thesis
Full Text:: : John S. Selker The agricultural production of peppermint has been shown to contribute significant

Monitoring potential groundwater contamination due to agricultural production in Lane County, Oregon

Creator:: Gatchell, Lance O.
Resource Type:: Masters Thesis
Full Text:: . John S. Selker for his unending patience and encouragement. His friendly, low stress, yet vigorous

Interactions between microbial dynamics and transport processes in soils

Creator:: Rockhold, Mark L.
Abstract:: An experimental and numerical modeling investigation was conducted to study interactions between microbial dynamics and transport processes in variably saturated porous media. These interactions are important in a variety of applied problems such as water and wastewater treatment, bioremediation, and oil-field recovery operations. These processes and interactions also have great...
Resource Type:: Dissertation
Full Text:: ACKNOWLEDGMENTS I thank John Selker for serving as my advisor, and Peter Bottomley, Roy Haggerty, Jack Istok

Thermodynamics of non-dilute saline solutions in variably saturated porous media

Creator:: Burns, Erick R.
Abstract:: Non-dilute salt strength solutions occur in many near surface geologic environments. In order to better understand the occurrence and movement of the water and salt, mathematical models for this non-ideal fluid need to be developed. Initial boundary value problems may then be solved to predict behavior for comparison with observations....
Resource Type:: Dissertation
Full Text:: . Selker Non-dilute salt strenph solutions occur in many near surface geologic environments. In order to

Determining contact angle of solutions with varying surface tension on dry and pre-wetted silica sands

Creator:: McGinnis, Thomas L.
Abstract:: Infiltration of highly concentrated solutions into unsaturated sand is suspected to be affected by the liquid-gas interfacial tension between the resident water and that of the infiltrating solution. The wetting of non-porous solid surfaces by liquids is commonly quantified by contact angle measurements. However, it is well known that wettability...
Resource Type:: Masters Thesis
Full Text:: and Pre-wetted Sili Abstract approved: John S/Selker ;urface Tension on Infiltration of highly

Assessment of ground water recharge and quality under agricultural production in Lane County, Oregon

Creator:: Shelby, Patrick M.
Abstract:: Assessment of the environmental impacts of an agricultural production system requires information on both soil water quality and solute flux. Passive Capillary Samplers (PCAPS), which sample water from the vadose zone using fiber glass wicks, have shown potential to provide both flux and solute concentration in unsaturated zone sampling but...
Resource Type:: Masters Thesis
Full Text:: approved: John S. Selker Assessment of the environmental impacts of an agricultural production system

Design of capillary wick pore-water samplers and their effects on solute travel time and dispersion

Creator:: Knutson, John H.
Resource Type:: Masters Thesis
Full Text:: . Selker, who gave me the opportunity to complete a masters degree and supplied valuable guidance through

Assessment of variability and monitoring methods for leaching under cover crop management

Creator:: Hess, Mario
Abstract:: The contamination of ground water resources represents a serious problem and a prominent threat to the health of our society. This study focuses on the leaching of inorganic anions as a function of agricultural practices under natural field conditions. In order to enhance the understanding of such leaching processes, this...
Resource Type:: Masters Thesis
Full Text:: leben kann. Acknowledgments First of all, I want to thank Dr. John S. Selker, my advisor, for his

Field evaluation of passive capillary samplers in monitoring the leaching of agrochemicals

Creator:: Brandi-Dohrn, Florian M.
Abstract:: Soil solution samplers have certain inadequacies that limit their range of possible applications. Passive Capillary Samplers (PCAPS), which apply suction to the soil pore-water via a fiber glass wick, have shown promising results in preliminary experiments in regard to collection efficiency of water and of bromide tracers. The objectives of...
Resource Type:: Masters Thesis
Full Text:: : Redacted for Privacy John S. Selker Soil solution samplers have certain inadequacies that limit their

Evaluation of bioluminescence as a measure of bacterial cell density in porous media

Creator:: Uesugi, Sandra L.
Abstract:: Salicylate-induced, lux gene dependent bioluminescence was measured using a cooled charge-coupled device (CCD) camera to evaluate its potential as a quantitative measurement of cell density of Pseudomonas fluorescens HK44 in porous media. The CCD camera was able to detect bioluminescence from cell densities between 1x10⁶ and 1x10⁸ cells/ml in both...
Resource Type:: Masters Thesis
Full Text:: Selker Salicylate-induced, lux gene dependent bioluminescence was measured using a cooled charge

ScholarsArchive@OSU

Peppermint irrigation and nitrogen management for the reduction of nitrate loading to groundwater

Monitoring potential groundwater contamination due to agricultural production in Lane County, Oregon

Interactions between microbial dynamics and transport processes in soils

Thermodynamics of non-dilute saline solutions in variably saturated porous media

Determining contact angle of solutions with varying surface tension on dry and pre-wetted silica sands

Assessment of ground water recharge and quality under agricultural production in Lane County, Oregon

Design of capillary wick pore-water samplers and their effects on solute travel time and dispersion

Assessment of variability and monitoring methods for leaching under cover crop management

Field evaluation of passive capillary samplers in monitoring the leaching of agrochemicals

Evaluation of bioluminescence as a measure of bacterial cell density in porous media

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