Persistent Link:
http://hdl.handle.net/10150/191535
Title:
Prediction of nitrogen transformations in alkaline soils.
Author:
Shaffer, M. J.(Marvin James),1943-
Issue Date:
1970
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
A digital computer program was developed which models soil-water systems with respect to nitrogen transformations, including hydrolysis of urea, immobilization-mineralization of ammonia and organic nitrogen, and immobilization of nitrate nitrogen. Transformation rate equations were derived by applying techniques of systems and statistical analysis and using selected data from the literature. Simultaneous integration of the equations over time generates predicted concentrations for urea-N, organic-N, ammonia-N, and nitrate-N in the system. Comparisons were made of predicted and observed data for several soils having different textures and various moisture contents, temperatures, and fertilizer applications. This procedure yielded simple correlation coefficients of 0.992, 0.768, 0.969, and 0.972 for the previously mentioned nitrogenous types, respectively.
Type:
Thesis-Reproduction (electronic); text
LCSH Subjects:
Hydrology.; Soils -- Nitrogen content.; Alkali lands.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Hydrology and Water Resources; Graduate College
Degree Grantor:
University of Arizona
Committee Chair:
Dutt, Gordon R.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titlePrediction of nitrogen transformations in alkaline soils.en_US
dc.creatorShaffer, M. J.(Marvin James),1943-en_US
dc.contributor.authorShaffer, M. J.(Marvin James),1943-en_US
dc.date.issued1970en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractA digital computer program was developed which models soil-water systems with respect to nitrogen transformations, including hydrolysis of urea, immobilization-mineralization of ammonia and organic nitrogen, and immobilization of nitrate nitrogen. Transformation rate equations were derived by applying techniques of systems and statistical analysis and using selected data from the literature. Simultaneous integration of the equations over time generates predicted concentrations for urea-N, organic-N, ammonia-N, and nitrate-N in the system. Comparisons were made of predicted and observed data for several soils having different textures and various moisture contents, temperatures, and fertilizer applications. This procedure yielded simple correlation coefficients of 0.992, 0.768, 0.969, and 0.972 for the previously mentioned nitrogenous types, respectively.en_US
dc.description.notehydrology collectionen_US
dc.typeThesis-Reproduction (electronic)en_US
dc.typetexten_US
dc.subject.lcshHydrology.en_US
dc.subject.lcshSoils -- Nitrogen content.en_US
dc.subject.lcshAlkali lands.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineHydrology and Water Resourcesen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.chairDutt, Gordon R.en_US
dc.contributor.committeememberWright, Jerome J.en_US
dc.contributor.committeememberEvans, Daniel D.en_US
dc.identifier.oclc213415647en_US
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