Persistent Link:
http://hdl.handle.net/10150/290268
Title:
Generation of predetermined soil profiles in a soil bin
Author:
Eaton, Frank Edward
Issue Date:
2001
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:
The soil preparation in soil bins must be capable of generating a number of soil density profiles varying from uniform to heavily compacted layers lying below more friable soil. A subsurface rotating rod firmed the soil beneath the rod and repeated passes produced desired profiles. Retrofitting the existing instrumentation with virtual instrumentation methods resulted in measurements that were more precise and improved repeatability. A Wheatstone bridge force transducer measured Cone Index pressure as a function of soil penetration depth. Soil surface elevation and implement depths were located with ratiometric linear transducers. Speed and distance were measured with an optical encoder. Prime mover hydraulic oil temperatures and pressures were gauged with current loop sensors. Three Null Hypotheses were tested: a horizontal subsurface rotating rod will not cause an increase in soil cone index; repeated operation of the horizontal rotating rod will not result in increased soil cone indexes; and soil water content is not relevant to the resultant compaction level. The first two Null Hypotheses were rejected at the 5% level in the overall case although not in each case while the third Null Hypotheses was rejected at the 5% level in all cases.
Type:
text; Dissertation-Reproduction (electronic)
Keywords:
Engineering, Agricultural.
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Graduate College; Agricultural and Biosystems Engineering
Degree Grantor:
University of Arizona
Advisor:
Jordan, Kenneth A.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleGeneration of predetermined soil profiles in a soil binen_US
dc.creatorEaton, Frank Edwarden_US
dc.contributor.authorEaton, Frank Edwarden_US
dc.date.issued2001en_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.abstractThe soil preparation in soil bins must be capable of generating a number of soil density profiles varying from uniform to heavily compacted layers lying below more friable soil. A subsurface rotating rod firmed the soil beneath the rod and repeated passes produced desired profiles. Retrofitting the existing instrumentation with virtual instrumentation methods resulted in measurements that were more precise and improved repeatability. A Wheatstone bridge force transducer measured Cone Index pressure as a function of soil penetration depth. Soil surface elevation and implement depths were located with ratiometric linear transducers. Speed and distance were measured with an optical encoder. Prime mover hydraulic oil temperatures and pressures were gauged with current loop sensors. Three Null Hypotheses were tested: a horizontal subsurface rotating rod will not cause an increase in soil cone index; repeated operation of the horizontal rotating rod will not result in increased soil cone indexes; and soil water content is not relevant to the resultant compaction level. The first two Null Hypotheses were rejected at the 5% level in the overall case although not in each case while the third Null Hypotheses was rejected at the 5% level in all cases.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
dc.subjectEngineering, Agricultural.en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineAgricultural and Biosystems Engineeringen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorJordan, Kenneth A.en_US
dc.identifier.proquest3016496en_US
dc.identifier.bibrecord.b41939220en_US
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