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dc.contributor.advisorPost, Donald F.en_US
dc.contributor.authorBryant, Ross Becker, 1957-
dc.creatorBryant, Ross Becker, 1957-en_US
dc.date.accessioned2013-04-03T13:10:40Z
dc.date.available2013-04-03T13:10:40Z
dc.date.issued1990en_US
dc.identifier.urihttp://hdl.handle.net/10150/278039
dc.description.abstractLaser light scattering (LLS) is an alternate method for determining soil particle size. Since the majority of information on particle size analysis has traditionally been derived from sedimentation methods, it is important to be able to draw a relationship between these two methods. Twenty four soil samples from a set of 214 samples analyzed by LLS were selected and also analyzed using sedimentation techniques. Particle size percentages were obtained in five different size ranges and then these two techniques were compared. Linear regression equations were developed that convert numbers obtained from the LLS method to a pipette analysis equivalent. This data was then utilized to eliminate the variation of soil moisture due to soil texture to obtain a moisture content independent of soil moisture. This "adjusted moisture" was displayed on a geographic information system to locate areas in the soil profile where soil moisture is relatively high. The high "adjusted moisture" contents occurred predominately below 2.44 meters (8 ft.) depths suggesting that the pre-irrigation applied to this soil reached this depth.
dc.language.isoen_USen_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.subjectAgriculture, Agronomy.en_US
dc.subjectAgriculture, Soil Science.en_US
dc.subjectEnvironmental Sciences.en_US
dc.titleLaser light scattering and geographic information systems: Advanced methods for soil particle size analysis and data displayen_US
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
thesis.degree.grantorUniversity of Arizonaen_US
thesis.degree.levelmastersen_US
dc.identifier.proquest1341827en_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.nameM.S.en_US
dc.identifier.bibrecord.b26429664en_US
refterms.dateFOA2018-06-04T16:32:10Z
html.description.abstractLaser light scattering (LLS) is an alternate method for determining soil particle size. Since the majority of information on particle size analysis has traditionally been derived from sedimentation methods, it is important to be able to draw a relationship between these two methods. Twenty four soil samples from a set of 214 samples analyzed by LLS were selected and also analyzed using sedimentation techniques. Particle size percentages were obtained in five different size ranges and then these two techniques were compared. Linear regression equations were developed that convert numbers obtained from the LLS method to a pipette analysis equivalent. This data was then utilized to eliminate the variation of soil moisture due to soil texture to obtain a moisture content independent of soil moisture. This "adjusted moisture" was displayed on a geographic information system to locate areas in the soil profile where soil moisture is relatively high. The high "adjusted moisture" contents occurred predominately below 2.44 meters (8 ft.) depths suggesting that the pre-irrigation applied to this soil reached this depth.


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