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Office: Shantz 429 Phone: (520) 621-7228 updated March 2012kj |
As Associate Dean and Director, Economic Development & Extension, Jeffrey Silvertooth provides overall administrative leadership to University of Arizona Cooperative Extension. Specifically, he provides overall program leadership and administrative and personnel management for Arizona Cooperative Extension. The Director is also responsible for the development of an effective Extension education program and all related translational and applied research programs that are dedicated to extending knowledge resources to the people of the state. The Director sits on the Executive Council of the College of Agriculture and Life Sciences with three other Associate Deans and the Dean to formulate decisions for the College.
RESEARCH INTERESTS
The research program is directed towards the development of crop production management strategies (primarily irrigated cotton and cantaloupes) that optimize the soil-plant system agronomically and economically, with full consideration of the short- and long-term impact of inputs environmentally. A study of the soil-plant relationships regarding nurtrients essential to cotton and cantaloupes is an important part of the program. Salinity and sodicity management in agricultural soils is an important part of the program. The overall goal, by interacting with other programs, is to reduce the level of inputs such as pesticides, fertilizers, and irrigation water, and maintain profitability and sustainability in both the short- and long-term agricultural production systems in the desert Southwest
EDUCATION
December 1986. Ph.D. in Soil Science (Soil Fertility), Oklahoma State University. Dissertation Title: Methodology of total nitrogen determination in plant materials and the distribution of fertilizer nitrogen-15 in winter wheat.
December 1982. M.S. degree in Agronomy (Soil Fertility), Oklahoma State University. Thesis title: Effects of iron fertilizers on soybeans.
December 1976. B.S. degree in Agriculture (Agronomy), Kansas State University.
AWARDS AND HONORS
The American Society of Agronomy Fellow, 2010.
Administrator of the Year, College of Agriculture and Life Sciences, 2008
Certificate of Appreciation for commitment to advancing underrepresented minority students in math, science & engineering & leadership in the Alfred P. Sloan’s Foundation’s Minority Ph.D. Program, September 2007
Council Delegate from the Section on Agriculture, Food, and Renewable Resource, AAAS
Listed in Empire Who’s Who, 7 February 2006
September 1999 – June 2000, Leadership Development Program, Class No. 9,
USDA/ESCOP/ACOP
April 1996, Ag-100 Award for Excellence in Agricultural Research and Extension
November 1995, Arizona Farm Bureau Environmental Protection and Technology Award
May 1991, 1991 University of Arizona Extension Faculty of the Year Award
1985 - 1986, Graduate Student Council Representative, Oklahoma State University
April 1984, Graduate Scholarship, Oklahoma Plant Food and Education Society
WORK EXPERIENCE
June 2012-present. Associate Dean and Director, Economic Development & Extension. College of Agriculture and Life Sciences.
July 2000 – June 2012. Professor and Head of Department, Soil, Water and Environmental Science Department, University of Arizona, Tucson, Arizona.
October 1996 - June 2000. Professor and Extension Agronomist - Cotton, Department of Plant Sciences and Department of Soil, Water and Environmental Science, University of Arizona, Tucson, Arizona.
April 1992 - October 1996. Extension Agronomist - Cotton, Associate Specialist Department of Plant Sciences and Department of Soil and Water Science, University of Arizona, Tucson, Arizona.
May 1987 - April 1992. Extension Agronomist - Cotton, Assistant Specialist Department of Plant Sciences, University of Arizona, Tucson, Arizona.
January 1987 - May 1987. Instructor Soil Chemistry/Soil Science Agronomy Department Oklahoma State University
May 1982 - December 1986. Graduate Research Assistant Soil Fertility Research Project Agronomy Department Oklahoma State University
August 1980 - May 1982. Graduate Teaching/Research Assistant Fundamentals of Soil Science T.A. Soil Fertility Research Project R.A. Agronomy Department Oklahoma State University
September 1978 - August 1980. Agronomist-Crop Consultant, Manager Scientific Crop Services Collingwood Grain, Inc. Montezuma, Kansas
December 1976 - Sept 1978. Associate Agronomist-Crop Consultant Scientific Crop Services Collingwood Grain, Inc. Montezuma, Kansas
May 1968 - August 1976. Farm Worker Richardson Farms, Jack Richardson Valley Center, Kansas
MEMBERSHIPS
American Association for the Advancement of Science
American Chemical Society
American Geophysical Union
American Society of Agronomy
Cactus and Pine Arizona GCSA
Council for the Advancement of Science and Technology
Council for Agricultural Science and Technology
Crop Science Society of America
Geological Society of America
Pima County Farm Bureau
Soil Science Society of America
Soil and Water Conservation Society of America
Western Soil Science Society
TEACHING EXPERIENCE
2007 – present. Introduction to Soil Science, SWES 200, Soil, Water and
Environmental Science, University of Arizona
2001 - present. Soils and Soil Fertility, SWES 406, Soil, Water and
Environmental Science, University of Arizona
2001 - present. Fundamentals of Crop Production, PLS 406, Plant Sciences,
University of Arizona, modular course
1998 - present. Crop Science and Production, PLS 306, Plant Sciences, University of Arizona
1994 - present. Sustainable Management of Arid and Salt Affected Soils, SWES 401/501, Soil, Water and Environmental Science, University of Arizona
1987 (Spring). Instructor, Agron. 3893 Soil Chemistry, Oklahoma State University
1986 (Spring). Laboratory Assistant, Agron. 5813 Soil - Plant Relationships, Oklahoma State University
January 1982 - May 1987. Instructor, Fundamentals of Soil Science, Agron 2124 (Correspondence course), Oklahoma State University
August 1980 - May 1982. Teaching Assistant, Fundamentals of Soil Science, Agron 2124, Oklahoma State University
PUBLICATIONS
Refereed Journal Articles
Westerman, R.L., J.C. Silvertooth, H.J. Barreto, and D.L. Minter. 1984. Phosphorus and potassium effects on yield and nutrient uptake in arrowleaf clover. Soil Sci. Soc. of Am. J. 48:1292-1296.
Inskeep, W.P. and J.C. Silvertooth. 1988. Inhibition of hydroxyapatite precipitation in the presence of fulvic, humic, and tannic acids. Soil Sci. Soc. Am. J. 52:941-946.
Silvertooth, J.C. and R.L. Westerman. 1988. Digestion of plant materials for the determination of total N to include nitrate. Agron. J. 80(5):733-736.
Inskeep, W.P. and J.C. Silvertooth. 1988. Kinetics of hydroxyapatite precipitation at pH 7.4 and 8.4. Geochim Cosmochim. Acta 52, 1883-1893.
Silvertooth, J.C., J.E. Watson, J.E. Malcuit, and T.A. Doerge. 1991. Solute movement in an irrigated cotton production system. Soil Sci. Soc. Am. J. 56:548-555.
Watson, T.F. and J.C. Silvertooth. 1992. Seasonal dynamics of sweetpotato whitefly. Southwest Entomologist Journal 17(2):149-167.
Unruh, B.L., J.C. Silvertooth, and D.M. Hendricks. 1994. Potassium fertility status of several Sonoran desert soils. Soil Sci. 158(6):435-441.
Sanchez, C.A. and J.C. Silvertooth. 1996. Managing saline and sodic soils for producing horticultural crops. HortTech 6(2):99-107.
Unruh, B.L. and J.C. Silvertooth. 1996. Comparisons between an Upland and a Pima cotton cultivar: II. Nutrient uptake and partitioning. Agron. J. 88:589-595.
Unruh, B.L. and J.C. Silvertooth. 1996. Comparisons between an Upland and a Pima cotton cultivar: I. Growth and yield. Agron. J. 88:583-589.
Unruh, B.L. and J.C. Silvertooth. 1997. Date of planting and irrigation termination effects on yield of Upland and Pima cotton. J. Prod. Agric. 10(1):74-79.
Steger, A., J.C. Silvertooth, and P.W. Brown. 1998. Upland cotton growth and yield response timing the initial post-plant irrigation. Agron. J. 90: 455-461.
Norton, E.R. and J.C. Silvertooth. 1998. Field testing and validation of modeled soil solute movement in an irrigated cotton system. Agron. J. 90:623-630.
Silvertooth, J.C., J.C. Navarro, E.R. Norton, and C.A. Sanchez. 2001. Evaluation of a nitrogen-15 microplot design in a furrow irrigated row crop system. Soil Sci. Soc. Am. J. 65:247-250.
Tronstad, R., J.C. Silvertooth, and Steve Husman. 2003. Irrigation termination: an economic analysis of yield, quality, and market factors. J. Cotton Sci. 7:86-94.
Norton, E.R. and J.C. Silvertooth. 2007. Evaluation of Added Nitrogen Interaction Effects on Recovery Efficiency in Irrigated Cotton. Soil Science. 172(12):983-991
Norton, E.R. and J.C. Silvertooth. 2008. Nitrogen Volatilization from Arizona Irrigation Waters. Communications in Soil Science and Plant Analysis. 39(15/16):2378-2397.
Chapters in Scholarly Books
Silvertooth, J.C. 1991. Fertilizer use in cotton production worldwide. In W. Wichmann (ed.) International Fertilizer Use Review. International Fertilizer Industry Association. Paris, France. p. 457-471.
Silvertooth, J.C., K.L. Edmiston, W.H. McCarty, and D.R. Krieg. 1999. Production practices. In Cotton (a monograph), C.W. Smith and J.T. Cothren, Eds. John Wiley & Sons. New York, NY. p. 451-488.
Teaching Materials
Jacobsen, J.S. and J.C. Silvertooth. 1983. Soil fertility and management laboratory manual. Agron. 4234. Oklahoma State University. (60 pages).
Silvertooth, J.C. 1993/1999. Management of arid lands and salt affected soils - notes and reference manual. SWES 401/501. University of Arizona. (220 pages).
Silvertooth, J.C. 1998. Crop science and production - notes and reference manual. PLS 306. University of Arizona. (328 pages).
Abstracts
Silvertooth, J.C. and R.L. Westerman. 1986. Digestion of plant materials for the determination of total N to include nitrate. 78th Ann. Meeting, Am. Soc. of Agron., New Orleans, LA, Agron. Abstr.
Silvertooth, J.C. and R.L. Westerman. 1986. Uptake and distribution of nitrogen-15 in winter wheat under clean and reduced tillage system. 78th Ann. Meeting, Am.Soc. of Agron., New Orleans, LA, Agron. Abstr.
Inskeep, W.P. and J.C. Silvertooth. 1986. Kinetics of hydroxyapatite precipitation in the presence of humic and fulvic acids. 78th Ann. Meeting, Am. Soc. of Agron., New Orleans, LA, Agron. Abstr.
Silvertooth, J.C. and B.R. Gardner. 1988. Phosphate adsorption of several Arizona soils. 80th Ann. Meeting, Am. Soc. of Agron., Anaheim, CA, Agron. Abstr.
Silvertooth, J.C., A.K. Dobrenz, W.C. Hofmann, and D.L. Kittock. 1988. Date of planting effects on growth and photosynthesis of Upland and Pima cotton. Proc. Beltwide Cotton Prod. Res. Confs. New Orleans, LA. p. 91.
Silvertooth, J.C., T.A. Doerge, G.W. Thacker, and S.W. Stedman. 1989. Banded phosphate fertilization of cotton. 81st Ann. Meeting, Am. Soc. of Agron., Las Vegas, NV, Agron. Abstr.
Silvertooth, J.C., T.A. Doerge, G. Thacker, and S.W. Stedman. 1989. Effects of banded posphorus fertilizer on cotton. Western Soil Science Society of America Meetings, Bozeman, MT.
Silvertooth, J.C., J.E. Watson, and J.E. Malcuit. 1990. Evaluation of solute leaching potential in irrigated cotton. 82nd Ann. meeting, Am. Soc. of Agron., San Antonio, TX, Agron. Abstr.
Silvertooth, J.C., J.E. Malcuit, and J.E. Watson. 1990. Solute movement under irrigated cotton. Proc. Beltwide Cotton Prod. Res. Confs. Las Vegas, NV.
Silvertooth, J.C., T.A. Doerge, and J.E. Malcuit. 1991. Evaluation of nitrogen management strategies in Upland and Pima cotton. 83rd Ann. Meeting, Am. Soc. of Agron., Denver, CO, Agron. Abstr. p. 300.
Unruh, B.L., J.C. Silvertooth, T.A. Doerge, and D.M. Hendricks. 1992. Characterization of several Arizona soils relating to potassium fertility. 84th Ann. Meeting, Am. Soc. of Agron., Minneapolis, MN, Agron. Abstr. p. 294.
Silvertooth, J.C., P.W. Brown, and J.E. Malcuit. 1992. Growth and development patterns of Upland and Pima cotton in Arizona. 84th Ann. Meeting, Am. Soc. of Agron., Minneapolis, MN, Agron. Abstr. p. 156.
Brown, P.W. and J.C. Silvertooth. 1992. The Arizona cotton advisory program. 84th Ann. Meeting, Am. Soc. of Agronomy, Minneapolis, MN, Agron. Abstra. p. 25.
Sanchez, C.A., R.L. Roth, B.R. Gardner, and J.C. Silvertooth. 1993. Optimization of irrigation and N fertilization for sprinkler irrigated cauliflower on sand. 85th Annual Meeting, Am. Soc. of Agron., Cincinnati, OH, Agron. Abstr. p.285.
Unruh, B.L. and J.C. Silvertooth. 1993. Nitrogen, phosphorus, and potassium uptake by Upland and Pima cotton. 85th Annual Meeting, Am. Soc. of Agron., Cincinnati, OH, Agron. Abstr. p.290.
Unruh, B.L., J.C. Silvertooth, and D.M. Hendricks. 1993. Potassium fertility evaluation of several Arizona soils. 1993 Annual Meeting, Western Soc. of Soil Sci. (Agron. Abstr.) p.4.
Silvertooth, J.C., C.A. Sanchez, and B.L. Unruh. 1994. Evaluation of solute leaching potentials in furrow irrigated lettuce production. 86th Annual Meeting, Am. Soc. of Agron., Seattle, WA., Agron. Abstr. p. 315.
Unruh, B.L. and J.C. Silvertooth. 1994. University of Arizona 1994, Date of planting and irrigation termination effects on Upland and Pima cotton. 86th Annual Meeting, Am. Soc. of Agron., Seattle, WA., Agron. Abstr. p. 169.
Steger, A.J., J.C. Silvertooth, and P.W. Brown, University of Arizona. 1994. Timing initial post-planting irrigations of cotton using leaf water potential readings. 86th Annual Meeting, Am. Soc. of Agron., Seattle, WA., Agron. Abstr. p. 162.
Zeiher, C.A., Nkonko Matumba, P.W. Brown, and J.C. Silvertooth, University of Arizona. 1994. Night temperature effects on the growth dynamics of Upland Cotton during flowering. 86th Annual Meeting, Am. Soc. of Agron., Seattle, WA., Agron. Abstr. p.147.
Zeiher, C.A., P.W. Brown, N. Matumba, and J.C. Silvertooth. 1995. Response of Upland cotton to elevated night temperature. 87th Annual Meeting, Am. Soc. of Agron., St. Louis, MO, Agron. Abstr., p. 110.
Silvertooth, J.C., E.R. Norton, C.A. Sanchez, J.C. Navarro, and A. Galadima. 1997. Evaluation of a nitrogen-15 microplot design in a furrow irrigated row crop system. 89th Annual Meeting, Am. Soc. of Agron., Anaheim, CA., Agron. Abstr., p. 241.
Silvertooth, J.C., J.C. Navarro, E.R. Norton, and C.A. Sanchez. 1998. Affect of time of application on the uptake and recovery of fertilizer nitrogen in irrigated cotton. 90th Annual Meeting, Am. Soc. of Agron., Baltimore, MD, Agron. Abstr., p. 237.
Galadima, A., J.C. Silvertooth, and C.A. Sanchez. 1999. Mathematical models of potassium release kinetics for Sonoran Desert soils of Arizona. 91st Annual Meeting, Am. Soc. of Agron., Salt Lake City, UT., Agron. Abstr., p. 214.
Norton, E.R. and J.C. Silvertooth. 1999. Evaluation of applied nitrogen interaction effects in an irrigated cotton production system. 91st Annual Meeting, Am. Soc. of Agron., Salt Lake City, UT., Agron. Abstr., p. 257.
Holifield, C.D., J.C. Silvertooth, and H. Moser. 2000. Comparison of obsolete and modern cotton cultivars for irrigated production in Arizona. 92nd Annual Meeting, Am. Soc. of Agron., Minneapolis, MN., Agron. Abstr., p. 125.
Silvertooth, J.C. 2000. Soil and plant recovery of labeled fertilizer nitrogen in irrigated cotton. 92nd Annual Meeting, Am. Soc. of Agron., Minneapolis, MN., Agron. Abstr., p. 291.
Silvertooth, J.S. 2000. Phosphorus soil test calibration for irrigated cotton. 92nd Annual Meeting, Am. Soc. of Agron., Minneapolis, MN., Agron. Abstr., p. 367.
Norton, E.R. and J.C. Silvertooth. 2000. Ammonia volatilization from Arizona irrigation waters. 92nd Annual Meeting, Am. Soc. of Agron., Minneapolis, MN., Agron. Abstr., p. 367.
Norton, E.R. and J.C. Silvertooth. 2000. Evaluation of applied nitrogen interaction effects in an irrigated cotton production system. 92nd Annual Meeting, Am. Soc. of Agron., Minneapolis, MN., Agron. Abstr., p. 257.
Norton, E.R. and J.C. Silvertooth. 2001. Effects of temperature and water quality on nitrogen loss from Arizona irrigation waters. 93rd Annual meeting, Am. Soc. of Agron., Charlotte, NC., Agron. Abstr.
Silvertooth, J.C. 2003. Nutrient uptake in irrigated cantaloupes. Annual meeting, ASA-CSSA-SSSA, Denver, CO.
Norton, R., J.C. Silvertooth, and A. Galadima. 2004. Residual Soil Nitrogen Evaluations in Irrigated Soils of the Desert. Annual meetings, ASA-CSSA-SSSA, Seattle, WA.
Soto-Ortiz, R., J.C. Silvertooth, and A. Galadima. 2006. Nutrient uptake patterns in irrigated melons (Cucumis melo L.). Annual Meetings, ASA-CSSA-SSSA, Indianpolis, IN.
Soto-Ortiz, R., J.C. Silvertooth, and A. Galadima. 2006. Nutrient uptake in patterns in irrigated chiles (Capsicum annuum L.). Annual Meetings, ASA-CSSA-SSSA, Indianapolis, IN.
Babcock, E. and J.C. Silvertooth. 2010. Soil testing and plant analysis relationships for irrigated chile production. Annual Meetings, ASA-CSSA-SSA, Long Beach, CA.
ARTICLES
EXTENSION PUBLICATIONS
Silvertooth, J.C. and C.R. Farr. 1990. Management considerations for short season cotton production in Arizona. University of Arizona, College of Agriculture, Cooperative Extension Bulletin No. 8823.
Hine, R. and J.C. Silvertooth. 1990. Diseases and production problems of cotton in Arizona. University of Arizona, College of Agriculture, Cooperative Extension Bulletin No. 8927.
Silvertooth, J.C. and T.A. Doerge. 1990. Nitrogen management in Arizona cotton production. University of Arizona, College of Agriculture, Cooperative Extension Bulletin No. 9024.
Silvertooth, J.C. 1991. Agronomic guidelines for Pima cotton production in Arizona. University of Arizona, College of Agriculture, Cooperative Extension Bulletin No. 190038.
Silvertooth, J.C. 1991. Defoliation of Pima cotton. University of Arizona, College of Agriculture, Cooperative Extension Bulletin No. 191052.
Ayala, F. and J.C. Silvertooth. 1993. Physiology of cotton defoliation. University of Arizona, College of Agriculture, Cooperative Extension Bulletin No. 193010.
Arizona Cotton Agronomy Series Bulletins, J.C. Silvertooth: (available through the Arizona Cotton Information Site (ACIS) http://ag.arizona.edu/crops/cotton/cotton.html)
Silvertooth, J.C. 1998. General maturity groups for cotton varieties. University of Arizona Cooperative Extension Bulletin No. AZ 1214.
Silvertooth, J.C. 2001. Plant population evaluation/management for cotton. University of Arizona Cooperative Extension Bulletin No. AZ 1203.
Silvertooth, J.C. 2001. Nitrogen management for cotton. University of Arizona Cooperative Extension Bulletin No. AZ 1200.
Silvertooth, J.C. 2001. Soil Fertility and Soil Testing Guidelines for Arizona Cotton. University of Arizona Cooperative Extension Bulletin No. AZ 1215.
Silvertooth, J.C. 2001. Saline and Sodic Soil Identification and Management for Cotton. University of Arizona Cooperative Extension Bulletin No. AZ 1199.
Silvertooth, J.C. 2001. Nitrogen Management for Cotton. University of Arizona Cooperative Extension Bulletin No. AZ 1200.
Silvertooth, J.C. 2001. Feedback Requirements for Nitrogen Management. University of Arizona Cooperative Extension Bulletin No. AZ 1201.
Silvertooth, J.C. 2001. Soil Management and Soil Testing for Irrigated Cotton Production. University of Arizona Cooperative Extension Bulletin No. AZ 1216.
Silvertooth, J.C. 2001. Early cotton development. University of Arizona Cooperative Extension Bulletin No. AZ 1205.
Silvertooth, J.C. 2001. Determining the mainstem node number for cotton. University of Arizona Cooperative Extension Bulletin No. AZ 1207.
Silvertooth, J.C. 2001. Following cotton development over the fruiting cycle. University of Arizona Cooperative Extension Bulletin No. AZ 1206.
Silvertooth, J.C. 2001. Estimating the vegetative/reproductive balance in cotton growth. University of Arizona Cooperative Extension Bulletin No. AZ 1218.
Silvertooth, J.C. 2001. Estimating cotton fruit retention. University of Arizona Cooperative Extension Bulletin No. AZ 1208.
Silvertooth, J.C. 2001. PIX_tm application guidelines for Arizona cotton. University of Arizona Cooperative Extension Bulletin No. AZ 1211.
Silvertooth, J.C. 2001. Crop Management for Optimum Fiber Quality and Yield. University of Arizona Cooperative Extension Bulletin No. AZ 1219.
Silvertooth, J.C. 2001. Deciding on the final irrigation. University of Arizona Cooperative Extension Bulletin No. AZ 1212.
Silvertooth, J.C. 2001. Physiology of cotton defoliation. University of Arizona Cooperative Extension Bulletin No. AZ 1240.
Silvertooth, J.C. 2001. Crop management for defoliation. University of Arizona Cooperative Extension Bulletin No. AZ 1213.
Silvertooth, J.C. 2001. Water management for defoliation. University of Arizona Cooperative Extension Bulletin No. AZ 1198.
Silvertooth, J.C. 2001. Agronomic Guidelines for Pima Cotton Production in Arizona. University of Arizona Cooperative Extension Bulletin No. AZ 1242.
Cotton Advisory Program. 1991- September 2000. This is weekly, single page publication developed for 12 distinct locations across the state. The advisory is developed each week by Paul Brown (Weather Update), Peter Ellsworth (Insect Update), and myself (Agronomy Update) every Monday A.M., for 32 weeks from February to September. The advisory is sent to county Extension offices in cotton producing areas where it is then sent to local clientele.
Silvertooth, J.C. and M. Olsen. 2002. Diseases and Production Problems of Cotton in Arizona. University of Arizona Cooperative Extension Bulletin No. AZ 1245
Silvertooth, J.C., F. Ayala, E.R. Norton, and T.A. Doerge. 2011. Management of Fertilizer Nitrogen in Arizona Cotton Production. University of Arizona Cooperative Extension Bulletin No. AZ 1243 (revised)
Silvertooth, J.C., P.W. Brown, and S. Walker. 2010. Crop Growth and Development for Irrigated Chile (Capsicum annuum). University of Arizona Cooperative Extension Bulletin No. AZ 1529