Responsibilities and Interests:

Conceive, develop, and implement N management research to sustain agricultural ecosystems and protect water quality. Couple N management to hydrology and P management, focusing on defining critical source areas and flow pathways at the landscape and watershed scales. Advisor to students, state and federal government agencies, and other organizations on N management and related water quality issues.

Education:

• 1994 Ph.D. North Carolina State University, Soil Science, Statistics minor
• 1991 M.S. North Carolina State University, Soil Science, Statistics minor
• 1985 B.S. University of Illinois, Soil Science

Professional Background:

• 2004-present Soil Scientist, USDA-ARS-PSWMRU, University Park, Pennsylvania
• 2004-present Adjunct Associate Professor, Department of Crop and Soil Sciences, The Pennsylvania State University, University Park, Pennsylvania
• 2003-2004 Associate Professor, Department of Agronomy, Kansas State University
• 1997-2003 Assistant Professor, Department of Agronomy, Kansas State University
• 1996-1997 Post Doctoral Research Associate, Department of Soil, Water, and Climate, University of Minnesota
• 1994-1996 Post Doctoral Research Fellow, Oak Ridge Institute for Science and Education, US EPA Laboratory - Corvallis, Oregon
• 1986-1988 U.S. Peace Corps Volunteer, The University of South Pacific - Alafua, Western Samoa

Selected Publications:

1. Shigaki, F., J.P. Schmidt, P.J. Kleinman, A.N. Sharpley, and A.L. Allen. In review 2008. Nitrogen fate in drainage ditches of the Coastal Plain after dredging. J. Environ. Qual. __:__-__.
2. Dellinger, A.E., J.P. Schmidt, and D.B. Beegle. In review 2008. Developing nitrogen fertilizer recommendations for corn (Zea mays L.) using an active sensor. Agron. J. __:__-__.
3. Sripada, R.P., J.P. Schmidt, A.E. Dellinger, and D.B. Beegle. Accepted in 2008. Evaluating multiple indices from a canopy reflectance sensor to estimate corn nitrogen requirements. Agron. J. __:__-__.
4. Shigaki, F., P.J. Kleinman, J.P. Schmidt, A.N. Sharpley, and A.L. Allen. Accepted in 2008. Impact of dredging on dissolved phosphorus transport in agricultural drainage ditches of the Atlantic Coastal Plain. J. Am. Water Res. Assoc. __:__-__.
5. Sharpley, A.N., P.J.A. Kleinman, A.L. Heathwaite, W.J. Gburek, G.J. Folmar, and J.P. Schmidt. 2008. Phosphorus loss from an agricultural watershed as a function of storm size. J. Environ. Qual. 37:362-368.
6. Schmidt, J.P., and H. Lin. 2008. Water and Bromide recovery in wick and pan lysimeters under conventional and zero tillage. Comm. Soil Sci. Plant Anal. 39:108-123.
7. Schmidt, J.P., N. Hong, G. Folmar, D.B. Beegle, and H. Lin. 2007. Optimum nitrogen rate for corn increases with greater soil water availability. p. 4.1-4.10. In Tom Bruulsema (ed.) Managing Crop Nitrogen for Weather. International Plant Nutrition Institute, Norcross, GA
8. Sharpley, A.N., J.P. Schmidt, and G.W. Hergert. 2007. Nutrient Management Practices. p. 149-194. In Schnepf, M. and C. Cox (ed) Environmental Benefits of Conservation on Cropland: The State of Our Knowledge. Soil & Water Conservation Society, Ankeny, IA.
9. Strock, J.S., C.J. Dell, and J.P. Schmidt. 2007. Managing natural processes in drainage ditches for non-point nitrogen control. J. Soil Water Conserv. 62:__-__.
10. Vadas, P.A., M.S. Srinivasan, P.J.A. Kleinman, J.P. Schmidt, and A.L. Allen. 2007. Subsurface nutrient transport in a ditch-drained agro-ecosystem. J. Soil Water Conserv. 62:178-188.
11. Schmidt, J.P., C.J. Dell, P.A. Vadas, and A.L. Allen. 2007. Nitrogen export from Coastal Plain field ditches. J. Soil Water Conserv. 62:235-243.
12. Schmidt, J.P., N. Hong, A. Dellinger, D.B. Beegle, and H. Lin. 2007. Hillslope variability in corn response to nitrogen linked to in-season soil moisture redistribution. Agron. J. 99:229-237.
13. Schlossberg, M.J., and J.P. Schmidt. 2007. Nitrogen and trinexapac-ethyl treatment of putting greens cohabitated by ‘Penn A4’ Creeping Bentgrass and Annual Bluegrass. Agron. J. 99:99-106.
14. Loughin, T.M., M.P. Roediger, G.A. Milliken, and J.P. Schmidt. 2007. On the analysis of long-term experiments. J. R. Statist. Soc. A. 170:29-42.
15. Kleinman, P.J.A., M.S. Srinivasan, C.J. Dell, J.P. Schmidt, A.N. Sharpley, and R.B. Bryant. 2006. Role of rainfall, seasonal hydrology and landscape factors on phosphorus and nitrogen in surface runoff. J. Environ. Qual. 35:1248-1259.
16. Gehl, R.J., J.P. Schmidt, C.B. Godsey, L.D. Maddux, and W.B. Gordon. 2006. Post-harvest soil nitrate in irrigated corn: Variability among eight field sites and multiple N rates. Soil Sci. Soc. Am. J. 70:1922-1931.
17. Gehl, R.J., J.P. Schmidt, L.R. Stone, A.J. Schlegel, G.A. Clark. 2005. In Situ Measurements of Nitrate Leaching Implicate Poor Nitrogen and Irrigation Management on Sandy Soils. J. Environ. Qual. 34:2243-2254.
18. Gehl, R.J., J.P. Schmidt, L.D. Maddux, and W.B. Gordon. 2005. Corn yield response to nitrogen rate and timing in sandy irrigated Soils. Agron. J. 97:1230-1238.
19. Schmidt, J.P., R.K. Taylor, and R.J. Gehl. 2003. Developing topographic maps using an agricultural global positioning receiver. Applied Engineering in Agriculture. 19(3):291-300.
20. Kastens, T.L., J.P. Schmidt, and K.C. Dhuyvetter. 2003. Yield models implied by traditional fertilizer recommendations and a framework for including non-traditional information. Soil Sci. Soc. Am. J. 67:351-364.

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