Professor
UGA, Dept. of Biological and Agricultural Engineering
2329 Rainwater Road
Tifton, GA 31793
Email: 
Phone: 229-386-3377
Fax: 229-386-3958
Water Resources; Precision agriculture
Primary research interests are in measuring, modeling, and limiting environmental impacts of agricultural production systems. A second major area of emphasis is precision agriculture with an emphasis on developing yield monitoring technologies and techniques for peanuts, cotton, and specialty crops.
Current responsibilities:
• BAE's Coordinator of Research, Extension and Instruction - Tifton Campus
• Leader of the TransAtlantic Precision Agriculture Consortium (TAPAC) – 3 USA and 3 European universities dedicated to internationalizing teaching, research and extension programs.
• Chair, University of Georgia Tifton Campus Curriculum Committee
• College of Agricultural & Environmental Sciences Curriculum Committee
APTC 3030 - Principles of Precision Agriculture (Fall semesters)
APTC 3080 - Introduction to Environmental Sciences and Engineering (Fall semesters)
AESC 3910 - International Agriculture Internship (on demand)
AESC 4530 - Agriscience and Environmental Systems Study Tour (on demand)
Of 54 refereed journal articles, 9 book chapters, 130 other publications.
• Morari, F., G. Vellidis, and P. Gay. 2010. Agriculture: Environment and Human Health Effects: Fertilizers. In: Nriagu, J. (Ed.) Encyclopaedia of Environmental Health. Elsevier Science Publishers, Amsterdam, The Netherlands, 12 p. Invited (in press).
• Cho, J., G. Vellidis, D.D. Bosch, R. Lowrance, and T. Strickland. 2009. Water quality effects of simulated conservation practice scenarios in the Little River Experimental Watershed. Journal of Soil and Water Conservation (Invited contribution to special issue, in press)
• Todd, M. J., G. Vellidis, R.R. Lowrance, and C.M. Pringle. 2009. High sediment oxygen demand within an instream swamp in southern Georgia: Implications for low dissolved oxygen levels in coastal blackwater streams. Journal of the American Water Resources Association 45(6):1493-1507.
• Vellidis, G., B. Ortiz, G. Ritchie, A. Peristeropoulos, C. Perry and K. Rucker. 2009. Using GreenSeeker® to drive variable rate application of plant growth regulators and defoliants on cotton. In: van Henten, E.J., D. Goense, and C. Lokhorst (Eds.), Precision Agriculture ‘09 – Proceedings of the 7th European Conference on Precision Agriculture (7ECPA), Wageningen, the Netherlands, pp. 55-72.
• Ortiz, B.V., G. Hoogenboom, G. Vellidis, K. Boote, R.F. Davis, C. Perry. 2009. Adapting the CROPGRO-cotton model to simulate cotton biomass and yield under southern root-knot nematode parasitism. Transactions of the ASABE 52(6):2129-2140.
• Utley, B., G. Vellidis, R. Lowrance, and M.C. Smith. 2008. Factors affecting sediment oxygen demand dynamics in blackwater streams of Georgia's coastal plain. Journal of the American Water Resources Association 44(3):742-753.
• Vellidis, G., M. Tucker, C. Perry, C. Kvien, and C. Bednarz. 2008. A real-time wireless smart sensor array for scheduling irrigation. Computers and Electronics in Agriculture 61(1):44-50.
• Carey, R.O., G. Vellidis, R. Lowrance, and C.M. Pringle. 2007. Do nutrients limit algal periphyton in small blackwater Coastal Plain streams? Journal of the American Water Resources Association 43(5):1183-1193.
• Vellidis, G., V. Garrick, S. Pocknee, C. Perry, C. Kvien, M. Tucker. 2007. How wireless will change agriculture. In: Stafford, J.V. (Ed.), Precision Agriculture ‘07 – Proceedings of the Sixth European Conference on Precision Agriculture (6ECPA), Skiathos, Greece, pp. 57-67. Invited Keynote Presentation.
• Vellidis, G., P. Barnes, D.D. Bosch, A.M. Cathey. 2006. Mathematical simulation tools for developing dissolved oxygen TMDLs. Transactions of the ASABE 49(4) 1003-1022.
• Gay, P., G. Vellidis, and J.J. Delfino. 2006. The attenuation of atrazine and its major degradation products in a restored riparian buffer. Transactions of the ASABE 49(5) 1323-1339.
• Vellidis, G., M.A. Tucker, C.D. Perry, T. Wells, and C. Kvien. 2004. Predictive cotton lint yield maps from aerial photographs. Precision Agriculture 5(6):547–564.
• Vellidis, 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.
• Suttles, J.B., G. Vellidis, D. Bosch, R. Lowrance, J.M. Sheridan, and E.L. Usery. 2003. Watershed-scale simulation of sediment and nutrient loads in Georgia coastal plain streams using the annualized AGNPS model. Transactions of the ASAE 46(5):1325-1335. Received ASAE Superior Paper Award for 2004
• Vellidis, G., Perry, C.D., Thomas, D.L, Durrence, J.S., and Hill, R.W. U.S. Patent 6,525,276 issued 25 February 2003 for “Crop Yield Monitoring System”, Principal Inventor. Technology was licensed by WAG Corporation of Tupelo, MS.
• Vellidis, G., R. Lowrance, P. Gay, and R.D. Wauchope. 2002. Herbicide transport in a restored riparian forest buffer system. Transactions of the ASAE 45(1):89-97. Received ASAE Honorable Mention Award for 2003.
• Vellidis, G., C.D. Perry, J.S. Durrence, D.L. Thomas, R.W. Hill, C.K. Kvien, T.K. Hamrita, and G.C. Rains. 2001. The peanut yield monitoring system. Transactions of the ASAE 44(4):775-785.
Active grants of $13,534,918 awarded in reserch grants and $4,814,500 awarded in facilities grants.
• Southern Peanut Farmers Federation, “Using GPS based Auto-Guidance to Increase the Profitability of Peanut Production”, $23,237, Jan 2010-Dec 2010, Co-PI
• Georgia Cotton Commission, “Evaluating the Feasibility of Variable Rate Application of Nitrogen in Georgia”, $39,300, Jan 2010 – Dec 2010, Project Leader.
• Cotton Inc., “Evaluating the Feasibility of Variable Rate Application of PGRs and Defoliants in Georgia”, $15,000, Jan 2010 – Dec 2010, Project Leader.
• Georgia Peanut Commission, “Using Vegetation Indices to Measure Peanut Maturity”, $5,000, Jul 2009 – Jun 2010, Project Leader.
• USDA-CSREES Conservation Effects Assessment Program, “Synthesis and Analysis of 13 CSREES CEAP Projects”, $600,000, Sep 2007- Sep 2011, Principal Investigator.
• USDA-CSREES Conservation Effects Assessment Program, “Long-Term Water Quality Responses to Conservation Practices in Nested Coastal Plain Watersheds”, $650,000, Sep 2005 – Sep 2010, Project Leader.
