James Walworth

James Walworth
Professor
Extension Specialist
Building/Room: 
Shantz Building, 422
Address: 

Department of Soil Water and Environmental Science
The University of Arizona
P.O. Box 210038
Tucson, Arizona 85721-0038

Office Phone: 
(520) 626-3364
Lab Phone: 
(520) 626-5510
Fax: 
(520) 621-1647

University of Georgia Agronomy, Ph.D., 1985
University of Wisconsin - Madison Soil Science, M.S., 1980
University of Wisconsin - Madison Soil Science, B.S., 1976

2007 to present: Professor of Soil Science and Extension Soil Specialist, Department of Soil, Water and Environmental Science, University of Arizona

1998 to 2007: Associate Professor of Soil Science and Extension Soil Specialist, Department of Soil, Water and Environmental Science, University of Arizona

1993 to 1998: Associate Professor of Soil Science, Department of Plant, Animal and Soil Sciences, University of Alaska Fairbanks

1989 to 1993: Assistant Professor of Soil Science, Department of Plant, Animal and Soil Sciences, University of Alaska Fairbanks

1985 to 1989: Assistant Professor of Soil Science, Soils and Crops Department, Rutgers University

1984 to 1985: Research Associate/Teaching Assistant, Agronomy Department, University of Georgia

1979 to 1981: Assistant Superintendent, Hancock Experiment Station, University of Wisconsin – Madison

Nutrient requirements for Arizona crops, especially pecans, turfgrass, and vegetables

Nutrient requirements and management in contaminated soils, concentrating on effects of nitrogen on soil water potential and microbial petroleum biodegradation

Irrigation water and soil salinity management in agricultural soils

Application of waste materials to soils, studying rates of degradation of soil-applied animal manures and environmental impacts of on-site human waste disposal systems.

Book Chapters:
J.L. Walworth and S. Ferguson. 2008. Nutritional Requirements for Bioremediation. pp. 154-169 In: D.M. Filler, D.L., Barnes, and I. Snape (Eds.). Bioremediation of Petroleum Hydrocarbons in Cold Regions. Cambridge University Press, Cambridge, UK.

J.L. Walworth, C.M. Reynolds, I. Snape, and A. Rutter. 2008. Land-Farming. pp. 170-189 In: D.M. Filler, D.L., Barnes, and I. Snape (Eds.). Bioremediation of Petroleum Hydrocarbons in Cold Regions. Cambridge University Press, Cambridge, UK.

I. Snape, C.M. Reynolds, J.L.Walworth, and S.H. Ferguson. 2008. Treatability studies: Microcosms, Mesocosms and Field Trials. pp. 125- 153 In: D.M. Filler, D.L., Barnes, and I. Snape (Eds.). Bioremediation of Petroleum Hydrocarbons in Cold Regions. Cambridge University Press, Cambridge, UK.

I. Snape, L. Acomb, D.L. Barnes, S. Bainbridge, R. Eno, D.M. Filler, N. Plato, J.S. Poland, T.C. Raymond, J.L. Rayner, M.J. Riddle, A.G. Rike, A. Rutter, A.N. Schafer, S.D. Siciliano, and J.L. Walworth. 2008. Contamination, Regulation and Remediation: an Introduction to Bioremediation of Petroleum Hydrocarbons in Cold Regions. pp. 1-37 In: D.M. Filler, D.L., Barnes, and I. Snape (Eds.). Bioremediation of Petroleum Hydrocarbons in Cold Regions. Cambridge University Press, Cambridge, UK.


Refereed Journal Articles:
Núñez-Moreno, H., J.L. Walworth, and A.P. Pond. 2011. Field Identification and Characterization of Manganese Toxicity in ‘Western Schley’ Pecan Trees. Acta Horticulturae of the Mineral Nutrition Session (Lisboa 2010 IHC Congress)

Bañuelos, J., J.L. Walworth, P.W. Brown, and D.M. Kopec. 2011. Deficit Irrigation of Seashore Paspalum and Bermudagrass. Agronomy Journal (accepted for publication).

McLain, J.E.T., C.M. Rock, K. Lohse, J. Walworth. 2011. False Positive Identification of E. coli in Treated Municipal Wastewater and Wastewater-Irrigated Soils. Canadian Journal of Microbiology.

Núñez-Moreno, H., J.L. Walworth, A.P. Pond, and M.W. Kilby. 2009. Soil Zinc Fertilization of ‘Wichita’ Pecan Trees Growing under Alkaline Soils Conditions. HortScience 44(6):1736-1740.

Núñez-Moreno, H., J.L. Walworth, A.P. Pond. 2009. Manure and Soil Zinc application to ‘Wichita’ Pecan Trees Growing under Alkaline Conditions. HortScience 44(6):1741-1745.

Artiola, J.F. and J.L. Walworth. 2009. Irrigation Water Quality Effects on Soil Carbon Fractionation and Organic Carbon Dissolution and Leaching in a Semiarid Calcareous Soil. Soil Science 147(7): 365-371.

AL-Ismaily, S.S. and J.L. Walworth. 2008. Effects of Osmotic and Matric Potentials on Nitrogen Mineralization in Unamended and Manure-Amended Soil. Soil Science 173(3): 203-213.