This item was digitized as part of the Million Books Project led by Carnegie Mellon University and supported by grants from the National Science Foundation (NSF). Cornell University coordinated the participation of land-grant and agricultural libraries in providing historical agricultural information for the digitization project; the University of Arizona Libraries, the College of Agriculture and Life Sciences, and the Office of Arid Lands Studies collaborated in the selection and provision of material for the digitization project.

A Thesis submitted to The University of Arizona College of Medicine - Phoenix in partial fulfillment of the requirements for the Degree of Doctor of Medicine.

Thesis (M. S. - Soil, Water and Environmental Science)--University of Arizona, 2004. / Includes bibliographical references (leaves 131-133).

The dynamics of salt accumulation in the soil over time is one of major important information input needed for decision-making in regard to irrigate with saline water. As all waters contain some dissolved salts, during the irrigation these salts tend to concentrate in the soil causing depressed plant growth. Saline irrigation water, low soil permeability, inadequate drainage conditions, low rainfall and poor irrigation management all contribute to the tendency of salt accumulation in the soil. The principal salt accumulation problem of economic importance arises when non-saline soils become saline as result of irrigation. The dynamics of salt accumulation in this study, is based on the model for tracing salt distribution in the soil affected by the quantity and quality of irrigation water, amount of nitrogen and initial soil salinity. To verify the model for tracing salt distribution in the soil and to statistically estimate a crop-production function and soil salinity relation, agronomic data were used from field experiment conducted at the University of Arizona, Maricopa Agricultural Center (MAC), during the 1985 growing season and that utilized cotton variety Delta Pine 61. From the point of view of the response functions and salt accumulation in the soil, many assumptions were made before formulating the models. Results show that (1) no conclusions could be drawn with respect to the model of salt accumulation in the soil, (2) in the case of yield production function and soil salinity relation, the water quantity coeffient had an absolute value greater than one, (3) water quality and nitrogen coefficients had an absolute value less than one, (4) initial soil salinity coefficient had negative value, (5) looking for the best combination amoung the variables inputs, the marginal rate of substitution was greater than the ratio of prices, (6) the time path for soil salinity converge to a steady state conditions, and (7) the profitability of cotton irrigated with drip system is sensitive to yield increases and increases in the price of cotton.

No description available.

No description available.

The effect of hydrogen cyanamide (H₂CN₂) on budbreak and fruit maturity of 2-year old 'Flame Seedless' table grapes was investigated in a low desert climate in central Arizona. Dormant sprays of H₂CN₂ applied at 2.5 and 5.0% (v/v) concentrations hastened budbreak by at least 16 days with subsequent advancement of fruit maturity by 5 to 10 days. A 5.0% (v/v) dormant application of H₂CN₂ to whole vine, buds only or pruning cuts only advanced budbreak by at least 16 days and advanced fruit maturity by 1 to 5 days, regardless of application site. A more uniform budbreak was observed on H₂CN₂ treated vines, regardless of concentration or site of application when compared to control vines.

A modified plate load (MPL) test was developed to measure the in situ cohesion of a carbonate or caliche cemented soil. The MPL test was performed on the crest of a vertical cut in alluvial soil with a steel plate loaded until the soil failed. A three-dimensional slope stability analysis was then used to back calculate soil cohesion. In situ test results were used in conjunction with laboratory testing of deaggregated soils samples to completely define the Mohr-Coulomb strength parameters of the in situ soil. In order to check the result of the in situ test procedure, the field test conditions were modeled for use in a two-dimensional slope stability analysis using the computer program CSLIP1. A comparison of the results shows reasonable values of soil cohesion were obtained using the MPL test method.

A Thesis submitted to The University of Arizona College of Medicine - Phoenix in partial fulfillment of the requirements for the Degree of Doctor of Medicine. / Chlamydia and gonorrhea are among the most frequently reported infectious diseases in the United States. These two diseases are easily treated with antibiotics; however, challenges exist in providing treatment to cases and their sexual partners. Maricopa County implemented a Field Delivered Therapy (FDT) protocol to treat chlamydia and gonorrhea cases and contacts in 2009. Ultimately, this project sought to inform other public health departments across the United States regarding the benefits of FDT program to treat gonorrhea and chlamydia and provide better insight on how to treat the two most commonly reported infectious diseases. Existing data was analyzed from April 1, 2011 to October 31, 2014 (42 months) for all patients that received FDT in Maricopa County utilizing pharmacy records and electronic health records (PRISM and eClinicalWorks). The following pieces of information were collected from these data sources: gender, age, race/ethnicity, diagnosis, number of partners, and time to treatment. The data were then divided into four FDT groups (FDT, expedited partner therapy via FDT, FDT attempted and FDT planned). There were 172 patients in this analysis; 140 diagnosed or in contact with chlamydia and 16 diagnosed or in contact with gonorrhea. There were 79 patients (45.9%) in the FDT group, 28 (16.3%) in the FDT EPT group, 28 (16.3%) in the FDT attempted and 37 (21.5%) in the FDT planned group. The median age of these patients was 23.8 (range 16.6‐31); 111 (64.5%) were female. The median time to treatment for these patients was 24.6 days (range 0‐64.5 days). Most patients (79.6%) lived outside of central Phoenix. The median number of sexual partners reported by these patients was 6.6 (range 1‐19.7 partners). A majority of the patients were <25 years old, except for in the FDT EPT group where 100% of patients were >25 years old. And the group with the largest <19‐year‐old population (32%) was in the FDT group. All the groups had a female majority, except in the FDT EPT group where 75% of the patients were male. Most patients in the FDT only group received testing at an outside hospital or outpatient clinic, while the FDT attempted and planned were more often tested at the STD clinic. Future Direction/Conclusion Many of the patients that received FDT are young women, some pregnant, that lived outside of Central Phoenix. However, a majority of the overall clients that received expedited partner therapy via FDT were male, a typically hard to reach population for treatment of potentially asymptomatic infections. This study demonstrates an effective method of delivering partner treatment to men. This study can be used to inform other public health departments about this novel practice and to help Maricopa County grow their FDT program to reach even more untreated patients.

Introduction: Vector-borne infectious diseases represent a major public health problem in both developing and developed nations. In particular, West Nile Virus (WNV), a mosquito-borne disease that can lead to severe disease and death in humans, caused over 2,100 reported cases in the United States last year (CDC, 2016). In Maricopa County, Arizona WNV has caused 474 reported cases during the last five years, with a case-fatality rate at 7.8%. Aim: To examine the association between weather patterns and incidence of WNV in Maricopa County, AZ from 2007 to 2013. Methods: We analyzed weekly data on climatological variables and WNV incidence from Maricopa County, AZ. The specific independent variables of interest were precipitation, minimum temperatures, mean temperatures, and maximum temperatures. A full model was generated using multiple linear regression, and a stepwise selection procedure yielded a minimal model. Results: The full multiple linear regression model explains 45.30% of the observed variance in WNV incidence. The variable showing a significant impact on WNV incidence in this model was rainfall (p <0.0001). Stepwise selection results explained 45.16% of the variance observed in the data. This model included two significant predictors: precipitation and maximum temperature. Conclusion: Climatic variables, particularly the amount of rainfall and maximum temperatures, significantly influence WNV dynamics in Maricopa County, Arizona. These findings are in line with prior studies and could be useful to guide mosquito control programs in the state of Arizona.