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dc.contributor.authorRivers, William James,1939-
dc.creatorRivers, William James,1939-en_US
dc.date.accessioned2011-11-28T14:01:48Z
dc.date.available2011-11-28T14:01:48Z
dc.date.issued1977en_US
dc.identifier.urihttp://hdl.handle.net/10150/191661
dc.description.abstractPerennial grass production on the Santa Rita Experimental Range about 4o miles south of Tucson is studied for responses to recent precipitation, use, key species, and range condition. Responses were evaluated by multiple linear regression analysis, cOrrelation coefficient analyses, and path coefficient analyses. Data were made available by the U. S. Dept. Agr. Forest Service. Observations were recorded annually from 1957 to 1966 for use, precipitation, and perennial grass production on 20 transects in each of four pastures. Perennial grass and shrub intercepts were read from the same transects for the period 1956-1966, excluding 1960. Range condition ratings were made on each of the transects in 1966. Perennial grass production was shown to be dependent on the product of current August X previous June-September precipitation. Use levels generally had weak negative effects on production. Range condition was found to be correlated with 10-year mean use. Range condition was not closely correlated with perennial grass production. Forage cover and percent invaders, decreasers, and increasers were the major determinants of range condition rating. These factors were not strongly correlated with perennial grass production.
dc.language.isoenen_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.subjectHydrology.
dc.subjectRangelands -- Research -- Arizona.
dc.subjectGrasslands -- Arizona.
dc.subjectGrasses -- Arizona.
dc.titlePredicting semidesert range perennial grass production from recent precipitation and grazing levelsen_US
dc.typeThesis-Reproduction (electronic)en_US
dc.typetexten_US
dc.contributor.chairMartin, S. Clarken_US
dc.identifier.oclc212777853en_US
thesis.degree.grantorUniversity of Arizonaen_US
thesis.degree.levelmastersen_US
thesis.degree.disciplineRenewable Natural Resourcesen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.nameM.S.en_US
dc.description.notehydrology collectionen_US
refterms.dateFOA2018-08-24T12:04:28Z
html.description.abstractPerennial grass production on the Santa Rita Experimental Range about 4o miles south of Tucson is studied for responses to recent precipitation, use, key species, and range condition. Responses were evaluated by multiple linear regression analysis, cOrrelation coefficient analyses, and path coefficient analyses. Data were made available by the U. S. Dept. Agr. Forest Service. Observations were recorded annually from 1957 to 1966 for use, precipitation, and perennial grass production on 20 transects in each of four pastures. Perennial grass and shrub intercepts were read from the same transects for the period 1956-1966, excluding 1960. Range condition ratings were made on each of the transects in 1966. Perennial grass production was shown to be dependent on the product of current August X previous June-September precipitation. Use levels generally had weak negative effects on production. Range condition was found to be correlated with 10-year mean use. Range condition was not closely correlated with perennial grass production. Forage cover and percent invaders, decreasers, and increasers were the major determinants of range condition rating. These factors were not strongly correlated with perennial grass production.


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