Travis Shaddox

Travis Shaddox
Assistant Professor

Professional Profile

2018-Present,  Assistant Professor. University of Kentucky, Department of Plant and Soil Sciences

2015-2018,  Assistant Professor. University of Florida. Ft. Lauderdale, FL.

2014-2015,  Postdoctoral Research Associate. University of Florida, Gainesville, FL.


Doctor of Philosophy. 2004. University of Florida, Gainesville, Florida.
Major: Soil and Water Science, specializing in soil fertility and turfgrass nutrition
Dissertation: “Investigation of soil amendments for use in golf course putting green construction”

Master of Science. 2001. University of Florida, Gainesville, Florida.
Major: Soil and Water Science, specializing in soil fertility and turfgrass nutrition
Thesis: “Fate of nitrogen during grow-in of a golf course fairway under different nitrogen management practices and irrigation intensities”

Bachelor of Science. 1999. Oklahoma State University, Stillwater, Oklahoma.
Major: Horticulture and Landscape Architecture. Option: turfgrass management

Additional Information


Dr. Travis Shaddox develops best management practices for the lawn, golf, sport turf, and sod industries. Specifically, his research focuses on soil fertility and turfgrass nutrition with consideration given to reducing costs and environmental risk from the application of granular and foliar nutrients. In addition, Dr. Shaddox continues to develop reliable interpretations of soil and tissue tests for turfgrasses.


Dr. Shaddox is a state turfgrass extension specialist who addresses soil fertility and nutrition issues in the golf, lawn care, sport turf, and sod production industries. He travels extensively supporting county extension faculty. In his prior position in Florida, his extension program was the Florida and Southern regional winner of the Excellence in Consumer or Commercial Horticulture by the National Association of County Agriculture Agents.

Google Scholars Page

Recent Publications

  • Shaddox, T.W. and J.B. Unruh. 2018. Correlating methods of measuring zoysiagrass thatch. In preparation.
  • Shaddox, T.W., J.K. Kruse, J.B. Unruh, J.E. Erickson, and B.W. Bahder. 2018. Nitrogen and phosphorus leaching through simulated rapid infiltration basins modified with organic and inorganic amendments. In preparation.
  • Shaddox, T.W., C.D. Ryan, and K. Tang. 2017. Reference ranges: A novel interpretation of turfgrass nutrient values. Agric. Environ. Lett. doi:10.2134/ael2016.12.0046. Note: This paper was featured in the ‘Society Science’ section of CSA News. 62(6):18.
  • Shaddox, T.W., J.B. Unruh, and L.E. Trenholm. 2017. Nitrogen required for acceptable centipedegrass quality, color, growth rate and nitrate leaching. Int. Turf. Soc. Res. J. doi: 10.2134/itsrj2061.04.0241.
  • McGroary, P., T.W. Shaddox, J.L. Cisar, J.B. Unruh, and L.E. Trenholm. 2017. Annual nitrogen requirement of bahiagrass lawns maintained in sub-tropical climates. Int. Turf. Soc. Res. J. doi: 10.2135/cropsci2016.05.0420.
  • Shaddox, T. W., J. K. Kruse, G. L. Miller, P. Nkedi-Kizza, and J. B. Sartain. 2016. Surfactant-modified soil amendments reduce nitrogen and phosphorus leaching in a sand-based rootzone. J. Environ. Qual. 45:1549-1557. doi:10.2134/jeq2016.01.0025.
  • Shaddox, T.W. J.B. Unruh, J.K. Kruse, and N.G. Restuccia. 2016. Solubility of iron, manganese and magnesium sulfates and glucoheptonates in two alkaline soils. Soil Sci. Soc. Am. J. 80:765–770. doi:10.2136/sssaj2015.10.0382.
  • Shaddox, T.W., J.B. Unruh, and L.E. Trenholm. 2016. Nitrate leaching from soluble nitrogen applied to ‘Floratam’ St. Augustinegrass and common centipedegrass during dormancy. Crop Sci. 56:837-844. doi: 0.2135/cropsci2015.02.0104.
  • Shaddox, T.W., J.B. Unruh, L.E. Trenholm, P.C. McGroary, and J.L. Cisar. 2016. Nitrogen rate required for acceptable St. Augustinegrass and associated nitrate leaching. Crop Sci. 56:439-451. doi: 10.2135/cropsci2015.04.0226.
  • Telenko, D.E.P., T.W. Shaddox, J.B. Unruh, and L.E. Trenholm. 2015. Nitrate leaching, turf quality, and growth rate of ‘Floratam’ St. Augustinegrass and common centipedegrass. Crop Sci. 55:1320–1328.
  • Shaddox, T.W., and J.B. Sartain. 2001. Fate of nitrogen during grow-in of a golf course fairway under different nitrogen management practices. Soil Crop Sci. Soc. Florida Proc. 60:59