Soil water potential as related to the Crop Water Stress Index of irrigated cotton

Persistent Link:
http://hdl.handle.net/10150/276940
Title:
Soil water potential as related to the Crop Water Stress Index of irrigated cotton
Author:
Copeland, Stephen Mark, 1955-
Issue Date:
1989
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 application of the crop water stress index (CWSI) method to irrigation scheduling is enhanced by knowledge of the relationship between CWSI and soil water potential (SWP) and how this relationship is affected by soil texture. A study using the same cultivar of cotton on three different soils was conducted in southern Arizona over a single growing season. Detailed data were collected of CWSI and soil moisture content for several treatments that scheduled irrigations at threshold CWSI values. CWSI was correlated with soil water potential values calculated from pressure plate determined moisture release curves. Spatial variability of soil characteristics necessitated use of average rather than plot specific moisture release curves. Analysis showed a linear CWSI-SWP relationship that varied greatly with soil depth and study site. The study concluded that soil profile average SWP alone does not normalize the CWSI between sites with different soil textures.
Type:
text; Thesis-Reproduction (electronic)
Keywords:
Cotton -- Irrigation -- Arizona.; Cotton -- Water requirements.; Soil moisture.; Soil texture.; Soils -- Arizona -- Remote sensing.
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College; Agricultural Engineering
Degree Grantor:
University of Arizona
Advisor:
Fangmeier, Delmar D.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleSoil water potential as related to the Crop Water Stress Index of irrigated cottonen_US
dc.creatorCopeland, Stephen Mark, 1955-en_US
dc.contributor.authorCopeland, Stephen Mark, 1955-en_US
dc.date.issued1989en_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 application of the crop water stress index (CWSI) method to irrigation scheduling is enhanced by knowledge of the relationship between CWSI and soil water potential (SWP) and how this relationship is affected by soil texture. A study using the same cultivar of cotton on three different soils was conducted in southern Arizona over a single growing season. Detailed data were collected of CWSI and soil moisture content for several treatments that scheduled irrigations at threshold CWSI values. CWSI was correlated with soil water potential values calculated from pressure plate determined moisture release curves. Spatial variability of soil characteristics necessitated use of average rather than plot specific moisture release curves. Analysis showed a linear CWSI-SWP relationship that varied greatly with soil depth and study site. The study concluded that soil profile average SWP alone does not normalize the CWSI between sites with different soil textures.en_US
dc.description.notep. 57 missing from paper original and microfilm version.-
dc.typetexten_US
dc.typeThesis-Reproduction (electronic)en_US
dc.subjectCotton -- Irrigation -- Arizona.en_US
dc.subjectCotton -- Water requirements.en_US
dc.subjectSoil moisture.en_US
dc.subjectSoil texture.en_US
dc.subjectSoils -- Arizona -- Remote sensing.en_US
thesis.degree.nameM.S.en_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineAgricultural Engineeringen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorFangmeier, Delmar D.en_US
dc.identifier.proquest1336339en_US
dc.identifier.oclc23710751en_US
dc.identifier.bibrecord.b17665188en_US
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