Dr. Daniel L. Thomas is currently Professor and Head of the Biological and Agricultural Engineering Department at Louisiana State University and the LSU Agricultural Center in Baton Rouge. Dr. Thomas assumed that role in March of 2003. Prior to that time he served as a faculty member at the University Georgia, Bio & Ag Engineering Department, College of Agricultural and Environmental Sciences Tifton Campus from 1984 to 2003 while working his way from Assistant Professor to Professor. While at the University of Georgia, he has served in different leadership roles including Research Leader (starting in 1991) to Research, Extension and Instruction Coordinator (starting in 1996) for the Tifton unit.

His career started with B.S. (1978) and M.E. (1980) degrees in Agricultural Engineering from Louisiana State University and a Ph.D. from Purdue University (1984). He has been involved in research and extension activities associated with drainage, water quality, irrigation, and precision systems. With over 70 refereed/reviewed publications, over 110 presentations to professional groups, over 70 formal extension presentations, and about 30 other publications, his research and extension efforts are well-known. He has been a member of ASAE, ASCE/EWRI, and SWCS for many years and has served in leadership positions in each organization. He has taught portions of college level courses on irrigation, professionalism/ethics, drainage, design of small dams, engineering graphics, and surveying. He has been recognized by Sigma Xi (Research Honorary), Alpha Epsilon (Agricultural Engineering Honorary), and Gamma Sigma Delta (Agricultural Honorary). He was the Panel Manager for the NRI Watershed Processes and Water Resources Program in 2004-2005. In 2005, Dr. Thomas was inducted into the first class of Diplomates for the American Academy of Water Resources Engineers. Dr. Thomas was inducted as a Fellow into the American Society of Civil Engineers in 2006.

Awards and Honors:

Team Member, CSREES Program Review for Dept of Ag & Bio Engineering, UFL, 2008

Team Leader, Program Review for Department of Bio & Ag Engineering, NCSU, 2007

Gamma Sigma Delta Teaching Merit Honor Roll, 2007 for teaching in the 2006 year

Metropolitan Who’s Who Among Executives and Professionals in Engineering, 2007/08

Panel Manager, USDA, ARS, Drainage and Water Quality Program Review, 2006

Leadership, Bio-based Energy Plan for the LSU AgCenter, 2006

Elected to Fellow, American Society of Civil Engineers, 2006-present

Elected to Diplomate Status for the inaugural class of the American Academy of Water Resources Engineers, 2005 – present.

Panel Manager, NRI Watershed Systems Program, USDA, CSREES, 2004-2005

Academic Keys Who’s Who in Agriculture Higher Education, 2003, 2004, 2005, 2006

Strathmore’s Who’s Who, 2001-2002.

SWCS State Merit Award, Riparian Ecosystem Management Team. 2000.

Named in the Top Ten Percent of Reviewers for Transactions of the ASAE - 1999

Sigma Xi (Scientific Research Society) - 1983.

Gamma Sigma Delta (Agriculture Honor Society) - 1983.

Alpha Epsilon (Agricultural Engineering Honor Society) - 1983.

3/03 to present     Professor & Head, Biological and Agricultural Engineering Department, Louisiana State University and the LSU Ag Center, Baton Rouge, LA.

5/98 to 3/2003     Professor & Research, Extension, & Instruction Coordinator, Biological and Agricultural Engineering Department, University of Georgia, College of Agricultural and Environmental Sci. (CAES) Tifton Campus, Tifton, GA.

11/96- 5/98     Associate Professor & REI Coordinator, Bio. & Ag. Engineering Dept., University of Georgia, CAES Tifton Campus, Tifton, GA.

11/91 - 11/96     Associate Professor and Research Leader, Biological and Agricultural Engineering Department, University of Georgia, CPES, Tifton, GA.

6/93 - 9/93     Visiting Associate Professor, Agricultural and Irrigation Engineering Department, Utah State University, Logan, UT

7/91- 11/91     Associate Professor, Biological and Agricultural Engineering Department, University of Georgia, CPES, Tifton, GA.

5/84 - 7/91     Assistant Professor, Biological and Agricultural Engineering Department, University of Georgia, CPES, Tifton, GA.

1/81 - 4/84     Graduate Research Instructor, Agricultural Engineering Department, Purdue University, West Lafayette, IN.

1/79 - 12/80     Graduate Research Assistant, Agricultural Engineering Department, Louisiana State University.

1/79 - 5/80     Laboratory Instructor, Agricultural Engineering Department, Louisiana State University.

9/78 - 12/78     Course Instructor, Engineering Graphics Department, Louisiana State University.

Other Professional Employment

11/03 – 9/04     GS-15, USDA, CSREES, Panel Manager for the Watershed Systems Panel for the NRI grant program

6/78 - 8/78     Design Engineers Assistant, Cane Machinery and Engineering Company (CAMECO), Thibodaux, Louisiana.

10/74 - 5/78     Microfilm Technician, Medical Records Department, Baton Rouge General Hospital, Baton Rouge, LA.

6-8/72-73     Water Quality Laboratory Technician and Shop Worker, Engineering Science Department, Louisiana State University, Baton Rouge, LA.

Identifying critical non-point source areas of pollution to Bayou Courtableau,2008-2009. LDEQ-US-EPA 319 Funds. $128,314. Co-PI.

 Water Quality Impacts by Implementing Improved Production and Management Practices in the Cabin-Teele Watershed in Northeastern Louisiana. 2006-2008. USDA Soil and Water Research Unit, Baton Rouge, LA, $97,561. Principal Investigator.

Lower Mississippi River Basin Nutrient Symposium, 2006. USDA Soil and Water Research Unit, Baton Rouge, LA, $5,000. Principal Investigator.

Soil and Water Research Program. 2004-2005. USDA, ARS, Soil and Water Research Unit, Baton Rouge, LA, $9,261. Principal Investigator.

Evaluation of level-basin irrigation in high rainfall zones, October, 2004 to September, 2009. USDA, ARS, US Water Conservation Laboratory, Phoenix, AZ. $47,850. PI

Irrigation of Soybeans on Precision-Graded Land. 2003-2004. LA Soybean and Grain Research and Promotion Board. $3,942. Co-PI.

Soil and Water Research Program. 2003-2004. USDA, ARS, Soil and Water Research Unit, Baton Rouge, LA, $50,000. Principal Investigator.

Irrigation Management for Peanut Production.  2001-2002.  Southeastern Peanut Research Initiative. $145,000.  Co-Project Leader.

Agricultural Water Use: Irrigation and Animal Use Evaluation Program for Georgia. 2000-2003. CSREES. $300,000. Project Leader.

Precision Agriculture Consortium for Land and Crop Health. 2000. USDA, CSREES, $2.8 million. June, 2000 to June, 2003. Co-Principal Investigator (submitted).

Development of an Innovative Education Tool for Irrigation Water Conservation. Georgia Department of Natural Resources, Environmental Protection Division, Water Resources Branch. $20,840.  June 1, 2000  to May 31, 2001. Principal Investigator (submitted).

Automated Monitoring of Agricultural Water Use in the Upper Floridan Aquifer. Georgia Department of Natural Resources, Environmental Protection Division, Geologic Survey Branch. $851,262. March 13, 2000 to March 12, 2002.  Co-Principal Investigator.

Developing Simple & Reliable Techniques for Using PYMS. 1999. Georgia Agricultural Commodity Commission for Peanut. $12,000. July 1, 1999 to June 30, 2000. Co-Principal Investigator.

Can Precision Farming Increase the Efficiency and Profitability of Peanut Growers? 1999. Peanut Foundation. $35,000. July 1, 1999 to June 30, 2000. Co-Principal Investigator.

Using Precision Farming Technologies to Improve Profitability in Cotton Production. 1999-2000. Georgia Agricultural Commodity Commission for Cotton. $30,000. Co-Project Leader.

Tailoring Precision Farming Technologies to Cotton for Improved Pest and Soil Management and Yield Evaluation.  1998-1999. Georgia Agricultural Commodity Commission for Cotton. $30,000. Co-Principal Investigator.

Creating Peanut Yield Maps & Turning Them into Money-Making Management Tools, 1998-1999. GACC Peanut. $9,000. Co-Principal Investigator.

Agricultural Water Use: A Monitoring and Evaluation Program for Georgia. 1999-2002. CSREES. $300,000. Project Leader.

AGricultural WATER: Potential Use and Management Program IN Georgia [AG WATER PUMPING]. 1998-2004. Georgia DNR, EPD, Geologic Survey. $1,305,747. Project Leader (plus $39,300 from Vice President for Research).

A Landscape Approach to Protecting Water Quality in the Southeastern Coastal Plain. 1997-2000. CSREES. $300,000. Co-Project Leader.

Evaluation of New Yield Monitoring Technologies for Cotton.  1997-1998. Georgia Agricultural Commodity Commission for Cotton. $30,000. Co-Principal Investigator.

Commercialization of a Yield Monitoring System for Peanuts. 1997-1998. Georgia Agricultural Commodity Commission for Peanuts. $6,000. Co-Investigator.

Current Status of Drip Irrigation Systems in Georgia. 1996-1997. Georgia Agricultural Commodity Commission for Pecans. $7,000. Co-Principal Investigator.

Development of a Yield Monitoring System for Peanuts. 1996-1997. Georgia Agricultural Commodity Commission for Peanuts. $9,000. Co-Investigator.

A Landscape Approach to Protecting Water Quality in the Southeastern Coastal Plain. 1996-1999. CSREES. $200,000. Co-Project Leader.

Development of Precision Farming Technologies for Southeastern Agricultural Production. 1996-1997. Georgia Research Alliance. $483,795. Co-Principal Investigator.

Riparian Ecosystem Management Model (REMM) Integration into an Ecological Risk Assessment System. 1996-1998. Subcontract to The Ohio State University, NSF project. $40,000. Principal Investigator.

Development of REMM system components. 1994-1998. USDA-ARS, Research Support Agreement. $136,500.  Principal Investigator.

Benchmark Farms for Irrigation Water Use Estimation.  1995-1997.  Georgia Department of Natural Resources. $50,000.  Principal Investigator.

Use of Chipped Vehicle Tires in Agricultural Applications.  1995-1996.  Georgia Department of Natural Resources. $10,000. Co-Investigator.

Benchmark Farms for Irrigation Water Use Estimation.  1994-1995.  US Geological Survey. $19,500.  Principal Investigator. (+ $550 from the Georgia Research Foundation).

Transfer of GLEAMS Model Technology.  1994.  USDA, Agricultural Research Service.  $25,000.  Principal Investigator.

Effects of Management and Ecosystem type on Nutrient Retention in Riparian Zones.  1993-1996.  National Research Initiative, Competitive Grants Program.  $298,000.  Co-Principal Investigator.

Development of Computer-Controlled, Variable-Rate, Center Pivot Irrigation System.  1993-1995.  USDA-ARS, Research Support Agreement.  Coastal Plains Soil and Water Research Center, Florence, SC.  $180,000.  Co-Investigator.

Processing of Pesticide and Nutrient Inputs by Managed and Restored Riparian Forests in the Southeastern Coastal Plain.  1992-1994.  U.S. EPA Environmental Research Laboratory, Duluth.  $250,000.  Co-Investigator.

Development of the National Environmentally Sound Production Agricultural Laboratory (NESPAL).  1990-1993.  $3.6 million.  USDA/CSRS buildings and facilities program (1 of 13 Principal Investigators). 1992-1993 $1.8 million. Environmental Technology Consortium, Georgia Research Alliance (1 of 8 PIs).

Water quality and resource management.  1992.  $1.9 million.  Georgia Institute of Technology and University of Georgia proposal to the Environmental Technology Consortium, Georgia Research Alliance (1 of 12 PIs).

Effects of Management on Nutrient and Pesticide Retention in a Riparian Buffer.  1991-1993.  National Research Initiative, Competitive Grants Program.  $198,908.  Co-Principal Investigator.

Measurement of pesticide transformation/degradation and transport using large undisturbed soil cores.  1990.  Southern Region, PIAP.  $18,000.  Co-Investigator.

Nitrogen Application and Drainage Effects on Nitrogen Losses and Uptake on Flue Cured Tobacco.  1990-1993.  Philip Morris, Inc.  $46,000. (Plus $2,500. from the University of Georgia Research Foundation, Inc.)  Principal Investigator.

Evaluation of a Means of Data Communications for Tobacco Farms.  1989.  Georgia Agricultural Commodity Commission for Tobacco.  $1,000.  Principal Investigator.

Cultivation as it Affects the Upward Movement of Water from a Subirrigation System.  1989.  Georgia Agricultural Commodity Commission for Tobacco.  $2,000.  Co-Principal Investigator.

Field Monitoring and Modeling of Agricultural Pesticide Fate.  1988.  Southern Region Pesticide Impact Assessment Program.   $18,000.  Co-Principal Investigator.

Monitoring Ground Water Quality for the Infiltration of Nitrogen Fertilizer.  1987.  Georgia Agricultural Commodity Commission for Tobacco.  $2,000.  Co-Principal Investigator.

Groundwater and Vadose Zone Modeling of Pesticide Fate and Transport.  1987.  Southern Region Pesticide.  $15,000.  Co-Principal Investigator.

Multiple Cropping Around Tobacco.  1987-1990.  Philip Morris, U.S.A.  $191,192.  Co-Investigator.

Drainage and Subirrigation Outflow and Groundwater Quality.  1986.  Office of Water Resources Technology.  $12,000.  Principal Investigator.

Expert Systems Application for Cotton.  1986.  Georgia Agricultural Commodity Commission for Tobacco.  $1,972.  Principal Investigator.

Improving Rapeseed Production Practices in the Southeastern United States.  1986-1988.  Martin Marietta Energy Systems, Inc.  $180,000.  Principal Investigator.

Evaluation of Subirrigation and Drainage for Georgia Conditions.  1984.  Office of Water Resources Technology.  $12,000. Co-Principal Investigator.

Subirrigation and Drainage Research System Installation.  1984.  Advanced Drainage Systems, Inc.  $10,000.  Principal Investigator.

Subirrigation and Drainage Research System Installation.  1984.  Abner Pope and Sons.  $8,000.  Principal Investigator.

Daniel L. Thomas: Publications

Chapters in Books: 5

Smith, M. C., D. K. Gattie, and D. L. Thomas. 2002. Agricultural Runoff Characteristics. Encyclopedia of Water Science, Marcel Dekker Publishers. New York, NY.

Thomas, D. L. 2002. Hydrology Research Centers. Encyclopedia of Water Science, Marcel Dekker Publishers. New York, NY.

Thomas, D. L. and M. C. Smith. 2002. Hydrologic Process Modeling. Encyclopedia of Water Science, Marcel Dekker Publishers. New York, NY.

Whitley, T. W. and D. L. Thomas. 1993. History of the Department of Biological and Agricultural Engineering, University of Georgia, Coastal Plain Experiment Station, Tifton, Georgia, 1919 - 1993. in History of the University of Georgia, Coastal Plain Experiment Station, 1919 - 1993. M. H. Bass, editor. Lang Printing Co., Tifton, GA 31794. pp. 130-151.

Raymer, P. L., D. G. Bullock, and D. L. Thomas. 1990. Potential of winter and spring rapeseed cultivars for oilseed production in the southeastern U.S.A. In: New Crops. J. E. Simon and J. Janick, editors. Purdue University Press, W. Lafayette, IN. Proceedings of the First National New Crops Symposium. (Invited publication).

Monographs: 3

Hook, J. E., K. A. Harrison, G. Hoogenboom, and D. L. Thomas. 2005. Ag Water Pumping, Statewide irrigation monitoring. Project Report 52 for EPD Cooperative Agreement Number 764-890147. 145 pp. http://www.nespal.org/awp/previous.asp

Fouss, J. L., R. O. Evans, D. L. Thomas, and H. W. Belcher. 1999. Operation of controlled-drainage and subirrigation facilities for water table management. Agricultural Drainage, ASA Drainage Monograph, Chapter 22. pp. 743-763.

^*Evans, R. O., K. A. Harrison, J. E. Hook, C. V. Privette, W. I. Segars, W. B. Smith, D. L. Thomas, and A. W. Tyson. 1998. Irrigation conservation practices appropriate for the southeastern United States. Edited by D. L. Thomas. Georgia Dept. Natural Resources, Envir. Protection Div., Geologic Survey Report No. 32. 38 p.

Refereed Journal Articles (in print or accepted): 45

(* denotes publications which have gone through rigorous peer review)

^*45Guerra, L. C., A. G. Y. Garcia, J. E. Hook, K. A. Harrison, D. L. Thomas, D. E. Stooksbury, and G. Hoogenboom. 2007. Irrigation water use estimates based on crop simulation models and kriging. Agricultural Water Management 89(3):199-207.

^*44Guerra, L. C., G. Hoogenboom, J. E. Hook, D. L. Thomas, V. K. Boken, and K. A. Harrison. 2005. Evaluation of on-farm irrigation applications using the simulation model EPIC. Irrigation Science 23(4):171-181. 10.1007/s00271-005-0105-6 http://dx.doi.org/10.1007/s00271-005-0105-6.

^*43Vellidis, G., M. A. Tucker, C. D. Perry, D. L. Thomas, N. Wells, and C. K. Kvien. 2004. Predicting cotton lint yield maps from aerial photographs. Precision Agriculture 5:547-564.

^*42Guerra, L. C., G. Hoogenboom, V. K. Boken, J. E. Hook, D. L. Thomas, and K. A. Harrison. 2004. Evaluation of the EPIC model for simulating crop yield and irrigation demand. Transactions of ASAE. 47(6):2091-2100.

^*41Thomas, D. L., K. A. Harrison, and J. E. Hook. 2004. Sprinkler irrigation scheduling with the UGA EASY Pan: Performance Characteristics. Applied Engineering in Agriculture. 20(4): 439-445.

^*40Boken, V. K., G. Hoogenboom, J. E. Hook, D. L. Thomas, L. C. Guerra and K. A. Harrison. 2004. Agricultural water use estimation using geospatial modeling and a geographic information system. Agricultural Water Management. 67(2004):185-199.

^*39Boken, V. K., G. Hoogenboom, F. N. Kogan, J. E. Hook, D. L. Thomas, and K. A. Harrison. 2004. Potential of using NOAA-AVHRR data for estimating irrigated area to help solve an interstate water dispute. International Journal of Remote Sensing, vol. 25(12): 2277-2286.

^*38Vellidis, G., C. D. Perry, G. Rains, D. L. Thomas, N. Wells, C. K. Kvien. 2003. Simultaneous assessment of cotton yield monitors. Applied Engineering in Agriculture. 19(3): 259-272.

^*37Rains, G. C., D. L. Thomas, C. D. Perry. 2002. Pecan mechanical harvesting parameters for yield monitoring. Transactions of the ASAE 45(2):281-285.

^*36Rains, G. C., D. L. Thomas, G. Vellidis. 2001. Soil-sampling issues for precision management of crop production. Applied Engineering in Agriculture 17(6):769-775.

^*35Vellidis, G., C. D. Perry, J. S. Durrence, D. L. Thomas, R. Hill, C. K. Kvien, T. K. Hamrita, G. Rains. 2001. The peanut yield monitoring system. Transactions of the ASAE 44(4):775-785.

^*34Tucker, M. G., D. L. Thomas, D. D. Bosch and G. Vellidis. 2000. GIS-based coupling of GLEAMS and REMM hydrology: I. Development and sensitivity. Transactions of the ASAE 43(6): 1525-1534.

^*33Tucker, M. A., D. L. Thomas, D. D. Bosch and G. Vellidis. 2000. GIS-based coupling of GLEAMS and REMM hydrology: II. Field test results. Transactions of the ASAE 43(6): 1535-1544.

^*32Kvien, C., N. Wells, G. Vellidis, D. Thomas, C. Perry, S. Pocknee, D. Kissel, and J. Durrence. 2000. Lesson learned in cotton from precision farming multidisciplinary research. Precision Agriculture. Accepted for publication.

^*31Sun, H., J. E. Houston, and D. L. Thomas. 2000. Modeling voluntary participation in a cost-sharing agricultural water quality management program. Annals of Operations Research Special Issue on Operations Research Models in Natural Resources 94 (2000): 125-138.

^*30Lowrance, R. R., L. S. Altier, R. G. Williams, S. P. Inamdar, J. M Sheridan, D. D. Bosch, R. K. Hubbard, and D. L. Thomas. 2000. REMM: The riparian ecosystem management model. J. of Soil and Water Conservation 55(1): 27-34.

^*29Inamdar, S. P., J. M. Sheridan, R. G. Williams, D. D. Bosch, R. R. Lowrance, L. S. Altier, and D. L. Thomas. 1999. Riparian Ecosystem Management Model (REMM): I. Testing of the hydrologic component for a Coastal Plain riparian system. Transactions of ASAE 42(6): 1679-1689.

^*28Thomas, D. L., C. D. Perry, G. Vellidis, J. Durrence, L. Kutz, C. K. Kvien, B. Boydell, T. K. Hamrita. 1999. Development and implementation of a load cell yield monitor for peanuts. Applied Engineering in Agriculture 15(3): 211-216.

^*27Boydell, B., G. Vellidis, C. D. Perry, D. L. Thomas, and R. W. Vervoort. 1999. Deconvolution of site-specific yield measurements to address peanut combine dynamics. Transactions of the ASAE 42(6): 1859-1865.

^*26Perry, C. D., G. Vellidis, R. R. Lowrance, and D. L. Thomas. 1999. Watershed-scale water quality impacts of riparian forest management. J. of Water Resources Planning and Management, ASCE, 125(3):117-125.

^*25Thomas, D. L., C. D. Perry, R. O. Evans, F. T. Izuno, K. C. Stone, and J. W. Gilliam. 1995. Agricultural drainage effects on water quality in the Southeastern U.S. Journal of Irrigation and Drainage Engineering 121(4): 277-282.

^*24Branch, B. G., Jr., S. R. Ghate, D. L. Thomas, and D. L. Cochran. 1994. Seedigation parameter effects on seed distribution within pipeline. Transactions of the ASAE 37(4):1053-1058.

^*23Thomas, D. L., P. L. Raymer, and M. A. Breve. 1994. Seeding depth and packing wheel pressure effects on oilseed rape emergence. Journal of Production Agriculture 7:94-97. Research Application Summary 7:19-20.

^*22Dixon, K. L., M. C. Smith, D. L. Thomas and W. G. Knisel. 1993. Leaching characteristics of banded and broadcast chemical applications. Transactions of the ASAE 36(6):1779-1788.

^*21Johnson, M. H., Jr., D. L. Thomas, B. D. McLendon. 1993. Controlled-drainage/subirrigation system automation based on soil water potential. Transactions of the ASAE 36(3):751-759.

^*20Perry, C. D., G. Vellidis, D. L. Thomas. 1993. A microprocessor-based data acquisition system for measuring soil moisture and temperature. Applied Engineering in Agriculture 9(3)285-292.

^*19Smith, M. C., G. Vellidis, D. L. Thomas, and M. A. Breve. 1992. Measurement of water table fluctuations using ground penetrating radar. Transactions of the ASAE 35(4):1161-1166.

^*18Thomas, D. L., P. G. Hunt, and J. W. Gilliam. 1992. Water table management effects on water quality in streams and shallow ground water of the eastern Coastal Plain. Journal of Soil and Water Conservation 47(1):65-70.

^*17Shirmohammadi, A., C. R. Camp, and D. L. Thomas. 1992. Water table management for field-sized hydrologic units in the Atlantic Coastal Plain. Journal of Soil and Water Conservation 47(1):52-57.

^*16Thomas, D. L., M. A. Breve, and P. L. Raymer. 1991. Influence of timing and method of harvest on seed yield of oilseed rape. Journal of Production Agriculture 4(2):266-272.

^*15Smith, M. C., A. B. Bottcher, K. L. Campbell, and D. L. Thomas. 1991. Field testing and comparison of the PRZM and GLEAMS models. Transactions of the ASAE 34(2):838-847.

^*14Thomas, D. L., A. Shirmohammadi, R. R. Lowrance, M. C. Smith. 1991. Drainage/subirrigation effect on water quality in the Georgia flatwoods. Journal of Irrigation and Drainage Engineering, January/February 117(1):123-137.

^*13Shirmohammadi, A., D. L. Thomas, and M. C. Smith. 1991. Drainage‑subirrigation design for pelham loamy sand. Transactions of the ASAE 34(1):73-80.

^*12Vellidis, G., M. C. Smith, D. L. Thomas, and L. E. Asmussen. 1990. Detecting wetting front movement in a sandy soil with ground-penetrating radar. Transactions of the ASAE 33(6):1867-1874.

^*11Thomas, D. L., M. C. Smith, A. Shirmohammadi, and C. D. Perry. 1990. Hydraulic capacity of control devices for water table management systems. Applied Engineering in Agriculture 6(6):745-750.

^*10Smith, M. C., D. L. Thomas, A. B. Bottcher, and K. L. Campbell. 1990. Measurement of pesticide transport to shallow groundwater. Transactions of the ASAE 33(5):1573-1582.

^*9Perry, C. D., D. L. Thomas, M. C. Smith and R. W. McClendon. 1990. Expert system based coupling of SOYGRO and DRAINMOD. Transactions of the ASAE 33(3):991-997.

^*8Thomas, D. L., M. A. Breve, P. L. Raymer and F. J. K. daSilva. 1990. Planting date effect and double cropping potential of rape in the southeastern United States. Applied Agricultural Research 5(3):205-211.

^*7Thomas, D. L., M. C. Smith, R. A. Leonard, and F. J. K. daSilva. 1990. Simulated effects of rapeseed production alternatives on pollution potential in the Georgia coastal plain. Journal of Soil and Water Conservation 45(1):148-154.

^*6Thomas, D. L., editor. 1989. Research needs in irrigation and drainage, 1989. Research and Education Administrative Standing Committee. Journal of Irrigation and Drainage Engineering 115(4):714-721. (Invited publication).

^*5Thomas, D. L. and W. A. Cromer. 1988. Temperature effects on CMOS multiplexers used for data acquisition. Computers and Electronics in Agriculture 3:109‑117.

^*4Thomas, D. L., F. J. K. daSilva and W. A. Cromer. 1988. Image processing technique for plant canopy cover evaluation. Transactions of the ASAE 31(2):428‑434.

^*3Hubbard, R. K., D. L. Thomas, R. A. Leonard and J. L. Butler. 1987. Surface runoff and shallow groundwater quality as affected by center pivot applied dairy cattle wastes. Transactions of the ASAE 30(2):430‑437.

^*2Thomas, D. L. and D. B. Beasley. 1986. A physically‑based forest hydrology model, II. Evaluation under natural conditions. Transactions of the ASAE 29(4):973‑981.

^*1Thomas, D. L. and D. B. Beasley. 1986. A physically‑based forest hydrology model, I. Development and sensitivity of components. Transactions of ASAE 29(4):962‑972.

Bulletins and Reports: 23

^*Thomas, D. L., and K. A. Harrison. 2006. UGA EASY Pan Irrigation Scheduler: Pan Size Considerations.  Extension Bulletin 1201A. Georgia Cooperative Extension Service. http://pubs.caes.uga.edu/caespubs/pubcd/B1201-A.htm

*Hook, J. E., K. A. Harrison, G. Hoogenboom, and D. L. Thomas. 2005. Ag Water Pumping, Statewide irrigation monitoring. Project Report 52 for EPD Cooperative Agreement Number 764-890147. 145 pp. (Received a peer review from a CAST panel). http://www.nespal.org/awp/previous.asp

Thomas, D. L., K. A. Harrison, M. D. Dukes, R. M. Seymour, F. N. Reed. 2004. Landscape and turf irrigation auditing: A mobile laboratory approach for small communities. GA Cooperative Extension Service Bulletin no. 1253 (also LAES in Louisiana and IFAS in Florida). http://pubs.caes.uga.edu/caespubs/pubcd/B1253.htm

Hawkins, G. and D. L. Thomas. 2002. Surface Water Resources and Impacts in Georgia. UGA, Cooperative Extension Service Bulletin no. 1217. Athens, GA 15 pp. http://pubs.caes.uga.edu/caespubs/pubcd/B1217.htm

Rains, G., and D. L. Thomas. 2001. Soil sampling issues for precision management of crop production. UGA, Cooperative Extension Bulletin No. 1208. Athens, GA 4 pp.

Thomas, D. L., K. A. Harrison, J. E. Hook, T. W. Whitley. 2001. UGA Easy Pan Irrigation Scheduler. UGA, Cooperative Extension Bulletin No. 1201. Athens, GA. 12 pp.

Parsons, J., D. L. Thomas, and R. Huffman, editors. 2001. Agricultural Non-point Source Water Quality Models: Their Use and Application. Southern Cooperative Series Bulletin No. 398. ISBN: 1-58161-398-9. 200 pp.

Rains, G. and D. L. Thomas. 2000. Introduction to Precision Farming. UGA, Cooperative Extension Service Bulletin no. 1186. 25 pp.

Thomas, D. L., et al. (Editor). 1999. Current Water Resources Programs and Activities. By the College of Agricultural and Environmental Sciences Water Task Force. CAES, Athens, GA. 23 pp.

Thomas, D. L., A. Shirmohammadi and B. A. Engel, editors. 1992. Application and enhancement of hydrologic/water quality models. Southern Cooperative Series Bulletin No. 372. Available through the Biological and Agricultural Engineering Department, University of Georgia, Coastal Plain Experiment Station, Tifton, GA 31793-0748 USA. 114 pp.

Thomas, D. L. 1992. Simulated sediment and chemical losses from crop production alternatives. in Application and enhancement of hydrologic/water quality models. edited by D. L. Thomas, A. Shirmohammadi and B. A. Engel. Southern Cooperative Series Bulletin No. 372. pp. 10-12.

Thomas, D. L. and M. C. Smith. 1992. Controlled-drainage/subirrigation effect on water quality in the Atlantic coast flatwoods. in Application and enhancement of hydrologic/water quality models. edited by D. L. Thomas, A. Shirmohammadi and B. A. Engel. Southern Cooperative Series Bulletin No. 372. pp. 13-15.

Perry, C. D. and D. L. Thomas. 1992. Expert system-based coupling of SOYGRO and DRAINMOD. in Application and enhancement of hydrologic/water quality models. edited by D. L. Thomas, A. Shirmohammadi and B. A. Engel. Southern Cooperative Series Bulletin No. 372. pp. 16-18.

Thomas, D. L., M. A. Breve, P. L. Raymer, N. A. Minton, and D. R. Sumner. 1990. Improving rapeseed production practices in the Southeastern United States. Final Project Report to Oak Ridge National Laboratory, Martin Marietta Energy Systems, Inc., U.S. DOE. ORNL/Sub/86-91324/1. 42 pp.

Seigler, W. E., S. Adkins, D. L. Thomas. 1989. Energy saving demonstration - Cotton gin drying. Final Report to the Georgia Office of Energy Resources, Atlanta, GA. 15 pp.

Beasley, D. B. and D. L. Thomas, editors. 1989. Application of water quality models for agricultural and forested watersheds. Southern Cooperative Series Bulletin No. 338. 116 pp.

Thomas, D. L., M. L. Griffin, and D. B. Beasley. 1989. Selection and evaluation, ANSWERS (Areal nonpoint source watershed environment response simulation). In: Application of Water Quality Models for Agricultural and Forested Watersheds. D. B. Beasley and D. L. Thomas, editors. Southern Cooperative Series Bulletin No. 338. pp. 5‑13.

Thomas, D. L., K. L. Campbell, and R. L. Bengtson. 1989. Selection and evaluation, CREAMS (Chemicals, runoff and erosion from agricultural management systems. In: Application of Water Quality Models for Agricultural and Forested Watersheds. D. B. Beasley and D. L. Thomas, editors. Southern Cooperative Series Bulletin No. 338. pp. 14‑20.

Thomas, D. L. 1989. The ANSWERS model: Forest hydrology version. In: Application of Water Quality Models for Agricultural and Forested Watersheds. D. B. Beasley and D. L. Thomas, editors. Southern Cooperative Series Bulletin No. 338. pp. 39‑43.

Smith, M. C., D. L. Thomas, B. M. Stone, and A. B. Bottcher. 1989. Field monitoring and modeling of agricultural pesticide fate and transport to ground water. Final Project Report. Southern Region Pesticide Impact Assessment Program. Project No. SR88-02-N-GA. Biological and Agricultural Engineering Department, University of Georgia, Coastal Plain Experiment Station, Tifton, GA 31793-0748 USA. 60 pp.

Smith, M. C., A. B. Bottcher, K. L. Campbell, and D. L. Thomas. 1988. Coupling vadose zone and ground water models to predict agricultural pesticide fate and transport. Final Project Report. Southern Region Pesticide Impact Assessment Program. Project No. SR87-22-W-FL. Biological and Agricultural Engineering Department, University of Georgia, Coastal Plain Experiment Station, Tifton, GA 31793-0748 USA. 41 pp.

Thomas, D. L. and F. J. K. daSilva. 1987. Evaluation of rapeseed as a winter cover crop in south Georgia. Final Report for the USDA‑DOE Herbaceous Energy Crops Program Under Specific Cooperative Agreement No. 58‑43YK‑5‑6. Agricultural Engineering Department, University of Georgia‑Coastal Plain Experiment Station, Tifton, GA. 27 pp.

Thomas, D. L., A. Shirmohammadi and R. R. Lowrance. 1987. Evaluation of subsurface and outflow water quality from a drainage‑subirrigation system in the Georgia flatwoods. Technical Completion Report for USGS Project No. G‑900(07). ERC 03‑86. Agricultural Engineering Department, University of Georgia‑Coastal Plain Experiment Station, Tifton, GA. 41 pp.

Published Proceedings of Research Conferences: 51

Clawson, E.L., D.K. Fisher, A.B. Coco, R. Husser, R.L. Hutchinson, and D. Thomas. 2006. Weighing lysimeters for measurement of cotton water use in Louisiana.  Proc. 2006 Beltwide Cotton Conferences, San Antonio, TX, Jan. 3-6.

Hook, J.E., K.A. Harrison, G. Hoogenboom, D.L. Thomas, L. Guerra, and V. Boken. 2005. Irrigation practices during long-term drought in the Southeast of America. Int. Water and Irrigation 25(4):22-28.

Thomas, D. L, K. A. Harrison, M. D. Dukes, J. W. Branch. 2005. Landscape and turf irrigation auditing for small communities. In Proceedings of the ASCE/EWRI Water Resources Conference in Anchorage, AL, May 16-19, 2005. 12 pp.

Hook, J. E., K. A. Harrison, G. Hoogenboom, D. L. Thomas, and V. Boken. 2004. Irrigation practices during long-term drought in the southeast. In Proceedings of the 2004 International Irrigation Association Meeting, Tampa, FL, November 14-16. 8 pp.

Hook, J. E., G. A. Abts, L. Wheeler, K. A. Harrison, G. Hoogenboom, D. L. Thomas. 2003. Center pivot and irrigation system monitoring for farmers and regulators. Anticipated for presentation at the 2003 Irrigation Association Meeting, Sacramento, CA.

Thomas, D. L., K. A. Harrison, V. J. Norton, N. A. Norton, J. E. Hook, D. A. Eigenberg, L. R. Wheeler. 2003. Recommendations for metering agricultural water withdrawals in Georgia. In Proceedings of the 2003 Georgia Water Resources Conference, April 23-24, 2003. Kathryn J. Hatcher, Editor. Institute of Ecology, The University of Georgia, Athens, Georgia.

Thomas, D. L., K. A. Harrison, J. E. Hook, G. Hoogenboom, R. W. McClendon, L. Wheeler, 2003. Agricultural water use in Georgia: Results from the Ag. Water PUMPING Program. In Proceedings of the 2003 Georgia Water Resources Conference, April 23-24, 2003. Kathryn J. Hatcher, Editor. Institute of Ecology, The University of Georgia, Athens, Georgia.

Newton, G. L., M. D. McCranie, V. J. Boken, D. L. Thomas, G. Hoogenboom. 2003. Agricultural water use associated with animal production systems in Georgia. In Proceedings of the 2003 Georgia Water Resources Conference, April 23-24, 2003. Kathryn J. Hatcher, Editor. Institute of Ecology, The University of Georgia, Athens, Georgia.

K. A. Harrison, D. L. Thomas, and F. N. Reed. 2003. Landscape irrigation auditing: A mobile laboratory approach for small communities. In Proceedings of the 2003 Georgia Water Resources Conference, April 23-24, 2003. Kathryn J. Hatcher, Editor. Institute of Ecology, The University of Georgia, Athens, Georgia.

Boken, V. K., G. Hoogenboom, L. C. Guerra, J. E. Hook, D. L. Thomas, and K. A. Harrison. 2003. Water use estimation for some major crops in Georgia using geospatial statistics. In Proceedings of the 2003 Georgia Water Resources Conference, April 23-24, 2003. Kathryn J. Hatcher, Editor. Institute of Ecology, The University of Georgia, Athens, Georgia.

Guerra, L. C., G. Hoogenboom, V. K. Boken, D. L. Thomas, J. E. Hook, and K. A. Harrison. 2003. Estimating statewide irrigation requirements using a crop simulation model. In Proceedings of the 2003 Georgia Water Resources Conference, April 23-24, 2003. Kathryn J. Hatcher, Editor. Institute of Ecology, The University of Georgia, Athens, Georgia.

Guerra, L., G. Hoogenboom, J. E. Hook, D. L. Thomas, K. A. Harrison. 2002. Predicting water demand for irrigation under varying cropping patterns and weather conditions. In proceedings of the International Irrigation Association Meeting, New Orleans, LA, October 24-26. 6 pp.

Hook, J. E., K. A. Harrison, D. L. Thomas. 2002. Development and goals of the C. M. Stripling Irrigation Research Park. In proceedings of the International Irrigation Association Meeting, New Orleans, LA, October 24-26. 6 pp.

Thomson, S. J. and D. L. Thomas. 2002. Experience with the UGA EASY pan for irrigation of cotton grown in midsouth clay soils. In proceedings of the International Irrigation Association Meeting, New Orleans, LA, October 24-26. 6 pp.

Harrison, K. A., D. L. Thomas, and F. N. Reed. 2002. Landscape irrigation auditing: A mobile laboratory approach for small communities. In proceedings of the International Irrigation Association Meeting, New Orleans, LA, October 24-26. 8 pp.

Wheeler, L., K. A. Harrison, D. L. Thomas, J. E. Hook, G. Hoogenboom. 2002. Field data collection for model evaluation of water use. In proceedings of the International Irrigation Association Meeting, New Orleans, LA, October 24-26. 6 pp.

Thomas, D. L., K. A. Harrison, J. E. Hook, G. Hoogenboom, L. Wheeler. 2002. Agricultural water use in Georgia: Monitoring results from Ag. Water PUMPING. In proceedings of the International Irrigation Association Meeting, New Orleans, LA, October 24-26. 6 pp.

Thomas, D. L., K. A. Harrison, J. E. Hook, T. W. Whitley. 2002. Sprinkler irrigation scheduling in humid areas with the EASY pan. In proceedings of the ASCE/EWRI/USCID Conference on Energy, climate, environment and water - issues and opportunities for irrigation and drainage, San Luis Obispo, CA July 9-12, 2002. 8 pp.

Thomas, D. L., K. A. Harrison, J. E. Hook, G. Hoogenboom, R. W. McClendon, L. Wheeler, W. I. Segars, J. Mallard, G. Murphy, M. Lindsay, D. D. Coker, T. Whitley, J. Houser, S. Cromer, C. Myers-Roche. 2001. Status of Ag. Water PUMPING: A program to determine agricultural water use in Georgia. In proceedings of the 2001 Georgia Water Resources Conference, March 26-27, 2001. Kathryn J. Hatcher, Editor. Institute of Ecology, The University of Georgia, Athens, Georgia. pp. 560-562.

Thomas, D., K. Harrison, J. Hook, G. Hoogenboom, and D. Stooksbury. 2000. Current water resources issues in Georgia: Their potential impact on irrigation. In proceedings of the ASCE/EWRI Watershed Management 2000 symposium, Fort Collins, CO. Edited by M. Flug and D. Frevert. June 19-22. Track E, Section 6. 8 pp.

Thomas, D. L., C. Myers-Roche, K. A. Harrison, J. E. Hook, A. W. Tyson, G. Hoogenboom, W. I. Segars. 1999. Ag. Water PUMPING: A new program to evaluate agricultural water use in Georgia. In proceedings of the 1999 Georgia Water Resources Conference, March 30-31, 1999. Kathryn J. Hatcher, Editor. Institute of Ecology, The University of Georgia, Athens, Georgia. pp. 560-562.

Hook, J. E., E. R. Blood, D. L. Thomas, K. A. Harrison, and R. Powell. 1999. Agricultural water consumption in the A.C.F. river basin: Current approaches for quantifying irrigation in Georgia. In proceedings of the 1999 Georgia Water Resources Conference, March 30-31, 1999. Kathryn J. Hatcher, Editor. Institute of Ecology, The University of Georgia, Athens, Georgia. pp. 429-432.

Durrence, J. S., D. L. Thomas, C. D. Perry, and G. Vellidis. 1999. Preliminary evaluation of commercial cotton yield monitors: the 1998 season in South Georgia. Proceedings of the 1999 Beltwide Cotton Conference, Orlando, FL.

Thomas, D. L., R. O. Evans, A. Shirmohammadi, and B. A. Engel. 1998. Agricultural non-point source water quality models: their use and application. Proceedings of the International Water Resources Engineering Conference, ASCE. Edited by S. R. Abt, J. Young-Pezeshk and C. C. Watson. Memphis, TN, Aug. 3-7. pp. 1818-1823.

Durrence, J. S., C. D. Perry, G. Vellidis, D. L. Thomas and C. K. Kvien. 1998. Mapping peanut yield variability with an experimental load cell yield monitoring system. Proceedings of the 1998 Conference on Precision Farming. Minneapolis, MN.

Perry, C. D., J. S. Durrence, D. L. Thomas, G. Vellidis, C. J. Sobolik, and A. Dzubak. 1998. Evaluation of commercial cotton yield monitors in Georgia field conditions. Proceedings of the 1998 Conference on Precision Farming. Minneapolis, MN.

Thomas, D. L., K. A. Harrison. G. Krewer. 1998. Shredded tire applications in agricultural drainage. In Proceedings of the Seventh International Drainage Symposium, “Drainage in the 21^st Century: Food Production and the Environment”, L. C. Brown, ed., Orlando, Florida, March 8-10. pp. 480-488.

Inamdar, S. P., J. M. Sheridan, R. G. Williams, D. D. Bosch, R. R. Lowrance, L. S. Altier, and D. L. Thomas. 1998. The riparian ecosystem management model: evaluation of the hydrology component. Proceedings of the 1^st Federal Interagency Hydrological Modeling Conference, Las Vegas, NV. April, 1998. pp. 7.17-7.24.

Lowrance, R. R., L. S. Altier, R. G. Williams, S. P. Inamdar, D. D. Bosch, J. M Sheridan, D. L. Thomas, R. K. Hubbard. 1997. The riparian ecosystem management model: sumulator for ecological processes in riparian zones. Proceedings of the USDA, ARS/Interagency Conference, Fort Collins, Colorado.

Krewer, G., J. M. Ruter, D. S. NeSmith, D. L. Thomas, P. Sumner, K. Harrison, G. Westberry, B. Mullinix, D. Knox. 1997. Preliminary report on the effect of tire chips as a mulch and substrate component for blueberries. Proceedings of the Sixth International Symposium on Vaccinium Culture. Edited by D. E. Yarborough and J. M Smagula. Acta Horticulturae Number 446, ISHS. pp. 309-318.

Perry, C. D., G. Vellidis, R. R. Lowrance, D. L. Thomas. 1995. Water quality impact of riparian forests in the Little River research watershed: A GIS study. Proceedings of the Conference on Versatility of Wetlands in the Agricultural Landscape, K. L. Campbell, editor. held in Tampa, Florida, September 17-20, 1995, ASAE, St. Joseph, MI. CD-ROM, pp. 221-234.

Smith, M. C., W. G. Knisel, D. L. Thomas, and S. R. Wilkinson. 1995. Representing poultry litter management with GLEAMS. in Water Resources Engineering, Volume 1. W. H. Espey, Jr. and P. G. Combs, editors. Proceedings of the First International Conference of the Water Resources Engineering Division, August 14-18, 1995, San Antonio, Texas, American Society of Civil Engineers. pp. 446-450.

Thomas, D. L. and J. E. Hook. 1995. Impacts of potential water use restrictions on row-crop irrigation in the ACF basin. in Integrated Water Resources Planning for the 21st Century, M. F. Domenica, editor. Proceedings of 22nd Annual Water Resources Planning and Management Conference, May 7-11, 1995, Cambridge, Massachusetts, American Society of Civil Engineers. (Invited Presentation) pp. 1026-1029.

Hook, J. E. and D. L. Thomas. 1995. Projected seasonal water consumption and water restrictions for row-crop irrigation in the ACF basin. Proceedings of the 1995 Georgia Water Resources Conference. Kathryn J. Hatcher, Editor. Carl Vinson Institute of Government, The University of Georgia, Athens, Georgia. pp. 276-279.

Thomas, D. L., C. D. Perry, R. O. Evans, and J. W. Gilliam. 1993. Effect of agricultural drainage on water quality in the Southeastern Coastal Plain. in Management of Irrigation and Drainage Systems: Integrated Perspectives, R. G. Allen and C. M. U. Neale, editors. Proceedings of the National Conference on Irrigation and Drainage Engineering, July 21-23, 1993, Park City, Utah, American Society of Civil Engineers. pp. 557-565.

Altier, L. S., R. R. Lowrance, R. G. Williams, J. M. Sheridan, D. D. Bosch, R. K. Hubbard, W. C. Mills, and D. L. Thomas. 1993. An ecosystem model for the management of riparian areas. Proceedings of the Conference on Riparian Ecosystems in the Humid U.S., Atlanta, GA.

Perry, C. D. and D. L. Thomas. 1993. COSSMO: A combination crop growth and water management modeling system. Proceedings of the 1993 Georgia Water Resources Conference. Kathryn J. Hatcher, Editor. Institute of Natural Resources, The University of Georgia, Athens, Georgia. pp. 380-382.

Smith, M. C., G. Vellidis, D. L. Thomas, and R. L. Leonard. 1993. Herbicide transport/transformation in large diameter soil cores from the Ohio MSEA. Agricultural Research to Protect Water Quality: Proceedings of the 1993 Conference. February 21-24, Minneapolis, MN. Soil and Water Conservation Society, Ankeny, IA.

Smith, M. C., G. Vellidis, D. L. Thomas, and R. L. Leonard. 1993. Chemical transport and transformation in large diameter soil cores. Proceedings of the 1993 Georgia Water Resources Conference. Kathryn J. Hatcher, Editor. Institute of Natural Resources, The University of Georgia, Athens, Georgia. pp. 217-220.

Perry, C. D, D. L. Thomas, and R. O. Evans. 1992. Validation of COSSMO: a combined crop growth and water management model. in Drainage and Water Table Control, edited by R. L. Bengtson and C. E. Carter. Proceedings of the Sixth International Drainage Symposium, December 13-15, Nashville, TN. American Society of Agricultural Engineers, St. Joseph, MI. pp. 30-37

Thomas, D. L., L. C. Brown, and J. L. Fouss. 1991. Research for new water table management systems. In: Irrigation and Drainage Engineering and Ground Water in the Pacific Rim. W. F. Ritter, editor. Proceedings of the National Conference on Irrigation and Drainage Engineering, July 23-26, 1991, Honolulu, Hawaii. American Society of Civil Engineers. pp. 138-144.

Thomas, D. L., C. T. Haan, and W. G. Knisel. 1991. Sediment and chemical losses from rapeseed production alternatives: model simulations and interpretations. Proceedings of the CIGR-seminar on Environmental Challenges and Solutions in Agricultural Engineering, H. Lilleng and B. Rognerud, Editors. July 1-4, 1991, Institute for Tekniske Fag, Aas, Norway. pp. 119-125. Agricultural University of Norway, Department of Agricultural Engineering, P.O. Box 65, N-1432 Aas-NLH.

Thomas, D. L. and M. C. Smith. 1991. Justification for water table management in Georgia. Proceedings of the 1991 Georgia Water Resources Conference. Kathryn J. Hatcher, Editor. Institute of Natural Resources, The University of Georgia, Athens, Georgia. pp. 288-291.

Raymer, P. L. and D. L. Thomas. 1990. Canola production systems in the southeast U.S. region. Proceedings of the International Canola Conference, Atlanta, GA, April 2-6. Sponsored by the Potash and Phosphate Institute, Atlanta, GA. pp. 271-279.

Thomas, D. L., M. C. Smith, M. A. Breve, and R. A. Leonard. 1989. Alternate production systems. Proceedings of the CREAMS/GLEAMS Symposium, Athens, GA, September, 1989. Bio. and Ag. Engineering, University of Georgia, Tifton, GA 31793. pp 149-160.

Smith, M. C. and D. L. Thomas. 1989. Water quality research in the south Georgia coastal plain. Proceedings of the 1989 Georgia Water Resources Conference. Kathryn J. Hatcher, Editor. Institute of Natural Resources, The University of Georgia, Athens, Georgia. pp. 230-233.

Maw, B. W. and D. L. Thomas. 1988. Sprinkler and subirrigation research park for multiple cropping research. In: Planning Now for Irrigation & Drainage in the 21st Century. D. R. Hay, editor. Proceedings of the Irrigation and Drainage Division Specialty Conference. American Society of Civil Engineers. pp. 341‑347.

Thomas, D. L. and R. W. McClendon. 1988. What is an expert system? In: Planning Now for Irrigation & Drainage in the 21st Century. D. R. Hay, editor. Proceedings of the Irrigation and Drainage Division Specialty Conference. American Society of Civil Engineers. pp. 528‑535.

Thomas, D. L., A. Shirmohammadi and R. R. Lowrance. 1987. Evaluation of water quality from a drainage‑subirrigation system in Georgia. In: Irrigation Systems for the 21st Century. Proceedings of the ASCE Irrigation and Drainage Division Specialty Conference. L. G. James and M. J. English, Editors. pp. 17‑24.

Thomas, D. L., A. Shirmohammadi and R. R. Lowrance. 1987. Subsurface and outflow water quality from drainage‑subirrigation systems. ASAE Technical Publication No. 07-87. Proceedings of the Fifth National Drainage Symposium. pp. 195‑202.

Thomas, D. L. and F. J. K. daSilva. 1986. Rape as a winter cover crop in south Georgia. Proceedings of the Solar, Biomass and Wind Energy Workshop. USDA‑DOE, Atlanta, GA., 6 pp.

Papers and Posters Presented at Scientific Meetings: 53

(¨ indicates papers which have published counterparts, ** indicates invited)

Ocampo, L. R., D. L. Thomas, J. E. Hook, and K. A. Harrison. 2003. Comparative loss study of four different sprinkler packages on center pivot systems under south Georgia conditions. ASAE Paper No. 03-2013. ASAE, St. Joseph, MI 12 pp.

Thomas, D. L., K. A. Harrison, J. E. Hook, and T. W. Whitley. 2003. Experience with the UGA EASY Pan for sprinkler irrigation scheduling. ASAE Paper No. 03-2141. ASAE, St. Joseph, MI 23 pp.

Thomas, D. L., K. A. Harrison, R. Reed, R. Bennett, V. Perez. 2002. Landscape and turf irrigation auditing: a mobile laboratory approach for small communities. ASAE Technical Paper No. 02-2247. ASAE, St. Joseph, MI. 30 pp.

Thomas, D. L., K. A. Harrison, J. E. Hook, T. W. Whitley. 2002. Sprinkler irrigation scheduling with the UGA EASY Pan. ASAE Technical Paper No. FL-2002-18. ASAE, St. Joseph, MI. 13 pp.

Guerra, L. C., G. Hoogenboom, V. K. Boken, J. E. Hook, D. L. Thomas, and K. A. Harrison. 2002. Estimating water demand for irrigation using a crop simulation model. ASAE Technical Paper No. 022030. ASAE, St. Joseph, MI. 12 pp.

Vellidis, G., C. D. Perry, G. Rains, D. L. Thomas, N. Wells, C. K. Kvien, R. W. Hill, D. Dales. 2002. Simultaneous assessment of cotton yield monitors. ASAE Technical Paper No. 02-1163. ASAE, St. Joseph, MI. 20 pp.

Thomas, D., J. Hook, G. Hoogenboom, K. Harrison, and D. Stooksbury. 2000. Drought management impacts on irrigation in southwest Georgia. ASAE Technical Paper No. 00-2015. ASAE, St. Joseph, MI. 8 pp.

Perry C. D., G. Vellidis, D. Thomas, J. Durrence, C. Kvien, T. Hamrita. 2000. PYMS - The peanut yield monitoring system. ASAE Technical Paper No. 00-1128. ASAE, St. Joseph, MI. # pp.

Rains, G. C., D. L. Thomas, C. D. Perry, T. W. Whitley, J. S. Durrence. 2000. Development and assessment of a pecan yield monitor. ASAE Technical Paper No. 00-1129. ASAE, St. Joseph, MI. # pp.

Vellidis, G., D. Thomas, C. Perry, J. Durrence, C. Kvien, T. Hamrita. 2000. PYMS - Peanut yield monitor system. ASAE Florida and Georgia State Section Meeting, Daytona Beach, Fl., May 10-13.

**Kvien, C., N. Wells, G. Vellidis, D. Thomas, C. Perry, S. Pocknee, D. Kissel, and J. Durrence. 1999. Lesson learned in cotton from precision farming multidisciplinary research. Precision Agriculture. Agronomy Abstracts, Salt Lake City, UT, ASA invitational presentation.

**Wells, T., G. Vellidis, D. Thomas, G. Rains, S. Pocknee, C. Perry, C. Kvien, D. Kissel, J. Hook, V. Garrick, and K. Franke. 1999. Macro and micro opportunities to improve profitability. APRES. Savannah, GA. July.

**Kvien, C., G. Vellidis, N. Wells, D. Thomas, G. Rains, S. Pocknee, C. Perry, D. Kissel, K. Franke, J. Durrence, and D. Betts. 1999. Improving efficiencies in agriculture through GPS referencing of resources ION (Intl Organization of Navigation) GPS. Nashville, Sept.

^¨Vellidis, G., D. L. Thomas, N. Wells, C. K. Kvien. 1999. Cotton yield maps created from aerial photographs. ASAE Technical Paper No. 99-1139. ASAE, St. Joseph, MI. 8 pp.

^¨Durrence, J. S., C. D. Perry, G. Vellidis, D. L. Thomas, C. K. Kvien. 1998. Evaluation of commercially available cotton yield monitors in Georgia field conditions. ASAE Technical Paper No. 98-3106. ASAE, St. Joseph, MI. 11 pp.

^¨Perry, C. D., J. S. Durrence, G. Vellidis, D. L. Thomas, R. W. Hill, and C. S. Kvien. 1998. Field experiences with a prototype peanut yield monitor. ASAE Technical Paper No. 98-3095. ASAE, St. Joseph, MI. 10 pp.

^¨Thomas, D. L., R. O. Evans, A. Shirmohammadi, and B. A. Engel. 1998. Agricultural non-point source water quality models: their use and application. ASAE Technical Paper No. 98-2193. ASAE, St. Joseph, MI. 8 pp.

Durrence, J., D. L. Thomas, C. D. Perry, A. Dzubak, C. Sobolik, G. Vellidis, C. Kvien. 1998. Evaluation of commercially available cotton yield monitoring systems. Beltwide Cotton Conference, January, San Diego, CA.

Inamdar, S. P., R. Lowrance, R. G. Williams, L. S. Altier, J. M Sheridan, D. Bosch, and D. L. Thomas. 1998. Use of the riparian ecosystem management model (REMM) to investigate the influence of riparian site conditions on hydrologic response. Poster for the National Conservation Buffers Technology Conference. San Antonio, TX, Jan. 26.

^¨Thomas, D. L., C.D. Perry, G. Vellidis, J. S. Durrence, L. J. Kutz, C. K. Kvien, B. Boydell, and T. K. Hamrita. 1997. Development of a load cell yield monitor for peanut. ASAE Technical Paper No. 97-1059. ASAE, St. Joseph, MI. 26 pp.

^¨Vellidis, G., E. Blood, J. Bradley, D. Bosch, J. Freeman, G. Gascho, S. Golladay, G. Harris, R. Hubbard, R. Lowrance, W. Michener, L. Newton, R. Odom, D. Pape, J. Sheridan, K. Smith, D. Thomas, L. Usery, R. WiIliams. 1997. A landscape approach to protecting water quality in the southeastern Coastal Plain. ASAE Technical Paper No. 97-2199. ASAE, St. Joseph, MI. 17 pp.

^¨Durrence, J. S., T. K. Hamrita, G. Vellidis, C. D. Perry, D. L. Thomas, and C. K. Kvien. 1997. Digital signal processing techniques for optimizing a load cell peanut yield monitor. ASAE Technical Paper No. 97-3009, ASAE, St. Joseph, MI, 25 pp.

^¨Perry, C. D., D. L. Thomas, G. Vellidis, J. S. Durrence, L. J. Kutz, and C. K. Kvien. 1997. Integration and coordination of multiple sensor and GPS data acquisition for precision farming systems. ASAE Technical Paper No. 97-3143, ASAE, St. Joseph, MI, 25 pp.

^¨Tucker, M. G., D. L. Thomas, and D. D. Bosch. 1996. GLEAMS and REMM GIS-based model system: results and sensitivity of hydrologic components. ASAE Technical Paper No. 96-2022. ASAE, St. Joseph, MI. 26 pp.

^¨Thomas, D. L. and K. A. Harrison. 1994. Irrigation system efficiencies in Georgia. ASAE Technical Paper No. 94-2101. ASAE, St. Joseph, MI. 13 pp.

^¨Tucker, M. A., D. L. Thomas, L. S. Altier, and D. D. Bosch. 1994. GIS interfaced with field & riparian zone models. ASAE Technical Paper No. 94-2151. ASAE, St. Joseph, MI. 13 pp.

^¨Ge, J., D. L. Thomas, C. R. Camp, and E. J. Sadler. 1994. Microsprinkler performance under a moving irrigation system simulator. ASAE Technical Paper No. 94-2168. ASAE, St. Joseph, MI. 16 pp.

^¨Sheridan, J. M., R. G. Williams, L. S. Altier, R. R. Lowrance, W. C. Mills, and D. L. Thomas. 1993. Hydrologic modeling for riparian management. ASAE Technical Paper No. 93‑2598. ASAE, St. Joseph, MI. 18 pp.

^¨**Thomas, D. L., M. C. Smith, W. G. Knisel, and R. A. Leonard. 1992. Alternate agricultural production system effects on sediment and chemical movement. Presented at the 2nd Annual University System Symposium on Research, "Designing Tomorrow's Sustainable Environment Today." Georgia Center for Continuing Education, Athens, GA. May 8-9.

^¨Thomas, D. L., C. F. Douglas, M. C. Smith, M. B. Parker, and M. G. Stephenson. 1992. Controlled-drainage and nitrogen rate effects on nitrate-nitrogen losses. ASAE Technical Paper No. 92‑2646. American Society of Agricultural Engineers, St. Joseph, MI. 15 pp.

^¨Smith, M. C., G. Vellidis, D. L. Thomas, E. W. Tollner, D. E. Radcliffe, and J. E. Hook. 1992. Research in porous media flow: The University of Georgia. ASAE Technical Paper No. 92‑2549. American Society of Agricultural Engineers, St. Joseph, MI. 12 pp.

^¨Thomas, D. L., M. C. Smith, G. Vellidis, C. D. Perry, and B. W. Maw. 1991. Status of water table management research in Georgia. ASAE Technical Paper No. 91‑2022. American Society of Agricultural Engineers, St. Joseph, MI. 12 pp.

^¨Johnson, M. H., Jr., D. L. Thomas, B. D. McLendon. 1991. Controlled-drainage/subirrigation control algorithm. ASAE Technical Paper No. 91‑2093. American Society of Agricultural Engineers, St. Joseph, MI. 22 pp.

^¨Dixon, K. L., M. C. Smith, D. L. Thomas, and W. G. Knisel. 1991. Characterization of solute plume propagation from banded and broadcast chemical applications. ASAE Technical Paper No. 91‑2071. American Society of Agricultural Engineers, St. Joseph, MI. 22 pp.

^¨Perry, C. D., D. L. Thomas, and G. Vellidis. 1990. A microprocessor-based data acquisition system for measuring soil water content and temperature. ASAE Technical Paper No. 90‑2583. American Society of Agricultural Engineers, St. Joseph, MI. 13 pp.

^¨Maw, B. M. and D. L. Thomas. 1990. Interdisciplinary studies on multiple cropping. ASAE Technical Paper No. 90‑2008. American Society of Agricultural Engineers, St. Joseph, MI. 8 pp.

^¨Smith, M. C., G. Vellidis, D. L. Thomas, and M. A. Breve. 1989. Measurement of water table fluctuations using ground penetrating radar. ASAE Technical Paper No. 89‑2519. American Society of Agricultural Engineers, St. Joseph, MI. 15 pp.

^¨Vellidis, G., M. C. Smith, D. L. Thomas, M. A. Breve, and C. D. Perry. 1989. Using ground-penetrating radar (GPR) to detect soil water movement in the soil. ASAE Technical Paper No. 89‑2520. American Society of Agricultural Engineers, St. Joseph, MI. 13 pp.

^¨Breve, M. A., D. L. Thomas, J. M. Sheridan, D. B. Beasley and W. C. Mills. 1989. Evaluation of ANSWERS in the Georgia coastal plain. ASAE/CSAE Technical Paper No. 89‑2044. American Society of Agricultural Engineers, St. Joseph, MI. 16 pp.

^¨Cromer, W. A., D. L. Thomas and M. C. Smith. 1989. A distributed control monitoring system for a subsurface irrigation and drainage research site. ASAE Technical Paper No. 89‑6073. American Society of Agricultural Engineers, St. Joseph, MI. 8 pp.

^¨Smith, M. C., K. L. Campbell, A. B. Bottcher and D. L. Thomas. 1989. Field testing and comparison of the PRZM and GLEAMS models. ASAE/CSAE Technical Paper No. 89‑2072. American Society of Agricultural Engineers, St. Joseph, MI. 20 pp.

^¨Stone, B. M., M. C. Smith and D. L. Thomas. 1989. Variability in point source measurement of shallow groundwater quality. ASAE/CSAE Technical Paper No. 89‑2120. American Society of Agricultural Engineers, St. Joseph, MI. 20 pp.

^¨Thomas, D. L. M. C. Smith, A. Shirmohammadi and C. D. Perry. 1989. Evaluation of control devices for water table management systems. ASAE/CSAE Technical Paper No. 89‑2136. American Society of Agricultural Engineers, St. Joseph, MI. 11 pp.

^¨Smith, M. C., A. B. Bottcher, K. L. Campbell, and D. L. Thomas. 1988. Measurement of pesticide transport to shallow groundwater. ASAE Technical Paper No. 88‑2640. American Society of Agricultural Engineers, St. Joseph, MI. 44 pp.

^¨Perry, C. D., D. L. Thomas, M. C. Smith and R. W. McClendon. 1988. Expert system based coupling of SOYGRO and DRAINMOD. ASAE Technical Paper No. 88‑2573. American Society of Agricultural Engineers, St. Joseph, MI. 22 pp.

^¨daSilva, F. J. K., D. L. Thomas and W. A. Cromer. 1986. Image processing technique for percent canopy cover evaluation. ASAE Technical Paper No. 86‑2533. American Society of Agricultural Engineers, St. Joseph, MI. 16 pp.

^¨Shirmohammadi, A., D. L. Thomas, E. D. Threadgill and F. J. K. daSilva. 1985. Design of drainage‑subirrigation systems for Georgia flatwoods soils. ASAE Technical Paper No. 85‑2605. American Society of Agricultural Engineers, St. Joseph, MI. 27 pp.

^¨Shirmohammadi, A., D. L. Thomas, E. D. Threadgill and F. J. K. daSilva. 1985. Drainage‑subirrigation system evaluation for Georgia flatwoods. Technical Completion Report, USGS Project No. G‑900(07). ERC 03-84. 42 pp.

^¨daSilva, F. J. K., D. L. Thomas, A. Shirmohammadi and W. A. Cromer. 1985. Development of a plant growth evaluation technique through computer‑based image processing. ASAE Technical Paper No. 85‑3547. American Society of Agricultural Engineers, St. Joseph, MI. 15 pp.

^¨Thomas, D. L. and A. Shirmohammadi. 1985. Soil moisture status under drainage‑subirrigation in the Georgia flatwoods. ASAE Technical Paper No. 85‑2512. American Society of Agricultural Engineers, St. Joseph, MI. 18 pp.

^¨Thomas, D. L. and D. B. Beasley. 1984. A distributed, management‑oriented, forest hydrology model. ASAE Technical Paper No. 84‑2019. American Society of Agricultural Engineers, St. Joseph, MI. 37 pp.

^¨Thomas, D. L. and D. B. Beasley. 1982. Modeling the forest hydrologic system. ASAE Technical Paper No. 82‑2601. American Society of Agricultural Engineers, St. Joseph, MI. 18 pp.

^¨Thomas, D. L., and R. J. Edling. 1980. Estimation of irrigation need in Louisiana. ASAE Technical Paper No. 80‑2087. American Society of Agricultural Engineers, St. Joseph, MI. 11 pp.

7. Abstracts: 24

Hook, J. E., K. A. Harrison, G. Hoogenboom, D. L. Thomas, and V. Boken. 2004. Irrigation practices during long-term drought in the Southeast. Presentation at the Irrigation Association Meeting in Tampa Florida, November.

Hook, J. E., E. R. Blood, D. L. Thomas, G. Hoogenboom, K. A. Harrison, V. K. Boken, L. C. Guerra. 2003. Irrigation and water conservation effects on monthly stream flow in a mixed cropping area. Presentation at 2003 ASA-CSSA-SSSA Annual meeting in Denver Colorado, November 2-6.

Boken, V. K., G. Hoogenboom, J. E. Hook, D. L. Thomas, K. A. Harrison, F. N. Kogan. 2002. Application of NOAA/AVHRR data for estimating crop irrigation. Paper presented at the annual meeting of the American Society of Photogrammetry and Remote Sensing, 19-26 April, Washington DC.

Boken, V. K., Hoogenboom, G., Hook, J.E., Thomas, D.M., Guerra, L.C., and Harrison, K.A. 2002. Estimating cotton-irrigation in Georgia using geostatistics and GIS. p. 103-104. In Proc. of the 25th Conference on Agricultural and Forest Meteorology, American Meteorological Society, Norfolk, Virginia, 20-24 May.

Guerra, L. C., G. Hoogenboom, V. K. Boken, D. L. Thomas, J. E. Hook, and K. A. Harrison. 2002. Predicting water demand for irrigation based on a crop simulation model and local weather data. p. 101-102. In Proc. Of the 25^th Conference on Agricultural and Forest Meteorology, Norfolk, VA.

Kvien, C., N. Wells, G. Vellidis, D. Thomas, C. Perry, S. Pocknee, D. Kissel, and J. Durrence. 1999. Lessons learned in cotton from precision farming multidisciplinary research. Precision Agriculture. Agronomy Abstracts, Salt Lake City, UT. American Society of Agronomy National Conference, November.

Precision Agriculture Team, UGA. (Including D. L. Thomas) 1999. Using management zones to aid crop protection in southeastern U.S. soils. Precision Agriculture ‘99 (The Peanut Grower Magazine Series). June 2-3, pp. 6-8.

Wells, T., G. Vellidis, D. Thomas, G. Rains, S. Pocknee, C. Perry, C. Kvien, D. Kissel, J. Hook, V. Garrick, and K. Franke. 1999. Macro and micro opportunities to improve profitability. APRES. Savannah, GA. July.

Kvien, C., G. Vellidis, N. Wells, D. Thomas, G. Rains, S. Pocknee, C. Perry, D. Kissel, K. Franke, J. Durrence, and D. Betts. 1999. Improving efficiencies in agriculture through GPS referencing of resources ION (Intl Organization of Navigation) GPS. Nashville, Sept.

Thomas, D. 1999. Yield Monitoring. Cotton Physiology Today. Vol 9(2):18-19.

Precision Farming Team, UGA. (Including D. L. Thomas) 1998. Precision farming simplified. Technology Update, Georgia Farmer. October Issue, Page 12.

Inamdar, S. P., R. Lowrance, R. G. Williams, L. S. Altier, J. Sheridan, D. Bosch, D. L. Thomas. 1998. Use of the riparian ecosystem management model (REMM) to investigate the influence of riparian site conditions on hydrologic response. Abstract, National Conservation Buffers Technology Conference, San Antonio, TX. Jan, 26.

Vellidis, G., D.L. Thomas, C.D. Perry, J.S. Durrence, C.Kvien, L. Kutz, B.Boydell, and T. Hamrita. 1997. Development and implementation of yield‑monitoring technologies for peanuts and cotton. In: Proceedings of the 1997 Ag Showcase `97.University of Georgia, College of Agricultural and Environmental Sciences, Experiment Station Publication No. 88. pp 15‑16.

Vellidis, G., D.L. Thomas, C.D. Perry, J.S. Durrence, C.Kvien, L. Kutz, B.Boydell, and T. Hamrita. 1997. Precision agriculture. In: Proceedings of the 1997 Ag Showcase `97. University of Georgia, College of Agricultural and Environmental Sciences, Experiment Station Publication No. 88. pp 19‑21.

Boydell, B. C., C. Perry, D. L. Thomas, and G. Vellidis. 1996. Dynamics of peanut flow through a peanut combine. 3rd International Conference on Precision Farming, June 23-26, Minneapolis, MN.

D. Waters, G. Vellidis, L. E. Usury, D. L. Thomas, S. Pocknee, J. E. Hook, H. M Green, B. Boydell. 1996. Precision farming. Agronomy Abstracts, American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America, Summary

Krewer, G., D. S. NeSmith, D. L. Thomas, J. Ruter, P. Sumner, K. Harrison, G. Westberry, and B. Mullinix. 1996. Tire chips as a mulch and drainage component for blueberries. ISHS Annual Conference, August, 1996.

Hook, J. E. and D. L. Thomas. 1995. Water application restrictions for row crops during drought years. Agronomy Abstracts, American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America, Summary No. S06132P.

Thomas, D. L., M. C. Smith, W. G. Knisel, and R. A. Leonard. 1992. Alternate agricultural production system effects on sediment and chemical movement. Abstract of the 2nd Annual University System Symposium on Research, "Designing Tomorrow's Sustainable Environment Today." Georgia Center for Continuing Education, Athens, GA. May 8-9.

Smith, M. C., K. L. Dixon, W. G. Knisel, and D. L. Thomas. 1992. Characterization of solute plume propagation from banded and broadcast chemical application. Abstract of the 2nd Annual University System Symposium on Research, "Designing Tomorrow's Sustainable Environment Today." Georgia Center for Continuing Education, Athens, GA. May 8-9.

Smith, M. C., G. Vellidis, D. L. Thomas, and L. E. Asmussen. 1990. Calibration of water table location in a sandy soil using ground-penetrating radar. Abstract of the Third International Conference on Ground-Penetrating Radar. Lakewood, CO. May 14-18. p.70.

Vellidis, G., M. C. Smith, D. L. Thomas, and L. E. Asmussen. 1990. Detecting soil water movement in a sandy soil with ground-penetrating radar. Abstract of the Third International Conference on Ground-Penetrating Radar. Lakewood, CO. May 14-18. p.77.

Raymer, P. L. and D. L. Thomas. 1990. Canola production systems in the southeast U.S. region. Abstract of the International Canola Conference, Atlanta, GA, April 2-6. Sponsored by the Potash and Phosphate Institute, Atlanta, GA. p.301.

Raymer, P. L., D. G. Bullock, and D. L. Thomas. 1988. Potential of winter and spring rapeseed cultivars for oilseed production in the southeastern U.S.A. In: Purdue University Press, W. Lafayette, IN. J. E. Simon and J. Janick, editors. Abstract of the First National New Crops Symposium. pp. 38.

8. Book reviews: 1

Keller, J. and R. Bliesner. 1990. Sprinkler and Trickle Irrigation. Van Nostrand Reinhold.

9.Other publications: 28

Thomas, D. L., Editor. 2003. Development of a monitoring/modeling system for agricultural water used determination. A project report for completion of the Ag. Water Pumping Program. Funded by the Georgia Geologic Survey Branch, Environmental Protection Division, Department of Natural Resources. 43 pp.

Harrison, K, D. Thomas, R. Reed, R. Bennett, V. Perez, and T. Whitley. 2002. Community report indicating results of the Mobile Landscape Irrigation Auditing Project in Douglas, Georgia</