Our Team
The California Nitrogen Assessment is led by four principal investigators – Thomas P. Tomich, Daniel Sumner, Kate M. Scow, and Randy Dahlgren – professors at the University of California, Davis. Additional project staff includes three post-doctoral research fellows, one communications and outreach fellow, and academic and communications coordinators. A distinguished nine-member technical advisory committee provides oversight for the project, a stakeholder advisory board provides comment and review from stakeholder perspectives, and an eight-member multidisciplinary faculty workgroup on nitrogen science and agriculture conducts complementary research.
Principal Investigators
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Randy DahlgrenDirector, Kearney Foundation of Soil ScienceDirector, Central Valley TMDL Research and Technical Support Program Department Chair, Professor of Soil Science and Pedologist/Soil Mineralogist, Department of Land, Air, and Water Resources, UC Davis |
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Kate M. ScowDeputy Director, Agricultural Sustainability Institute at UC DavisProfessor of Soil Science and Soil Microbial Ecologist, Department of Land, Air, and Water Resources, UC Davis |
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Daniel SumnerDirector, University of California Agricultural Issues CenterFrank H. Buck, Jr. Professor, Department of Agricultural and Resource Economics, UC Davis |
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Thomas P. TomichDirector, Agricultural Sustainability Institute at UC DavisW.K. Kellogg Endowed Chair in Sustainable Food Systems Director, UC Sustainable Agriculture Research and Education Program (SAREP) Professor of Community Development, Environmental Science & Policy UC Davis |
Research Fellows
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Antoine Champetier
Policy Options Packard Fellow
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Todd Rosenstock
Best Practices and Technical Options Packard Fellow |
Communications & Outreach Representative
Aubrey White
Communications and Outreach RepAgricultural Sustainability Institute at UC Davis UC Sustainable Agricultural Research and Education Program (SAREP) (530) 752-5299, abwhite@ucdavis.edu |
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Academic Coordinator
Sonja Brodt
Coordinator for Agriculture, Resources, and the Environment
Agricultural Sustainability Institute
UC Sustainable Agriculture Research and Education Program (SAREP)
(530) 754-8547, sbbrodt@ucdavis.edu
Technical Advisory Committee
Randy Dahlgren
Director, Kearney Foundation of Soil Science
Director, Central Valley TMDL Research and Technical Support Program
Department Chair, Professor of Soil Science and Pedologist/Soil Mineralogist, Department of Land, Air, and Water Resources, UC Davis
Thomas Harter
Robert M. Hagan Chair, Water Management and Policy
Department of Land, Air, and Water Resources, UC Davis
UC Cooperative Extension Groundwater Hydrologist
Ermias Kebreab
Professor, Sesnon Endowed Chair
Department of Animal Science, UC Davis
Faculty Affiliate, Agricultural Sustainability Institute at UC Davis
Frank Mitloehner
UC Cooperative Extension Livestock Air Quality Specialist
Department of Animal Science, UC Davis
Dan Putnam
Statewide Alfalfa & Forage Extension Specialist
Department of Agronomy & Range Science, UC Davis
Kate M. Scow
Deputy Director, Agricultural Sustainability Institute at UC Davis
Professor of Soil Science and Soil Microbial Ecologist, Department of Land, Air, and Water Resources, UC Davis
Johan Six
Professor
Department of Plant Sciences, UC Davis
Faculty Affiliate, Agricultural Sustainability Institute at UC Davis
Daniel Sumner
Director, University of California Agricultural Issues Center
Frank H. Buck, Jr. Professor, Department of Agricultural and Resource Economics, UC Davis
Thomas P. Tomich
Director, Agricultural Sustainability Institute at UC Davis
W.K. Kellogg Endowed Chair in Sustainable Food Systems
Director, UC Sustainable Agriculture Research and Education Program (SAREP)
Professor of Community Development, Environmental Science & Policy UC Davis
Multidisciplinary Faculty Work Group on Nitrogen Science and Agriculture
Valerie Eviner
Department of Plant Sciences, UC Davis
Ryan Galt
Department of Human and Community Development, UC Davis
Benjamin Houlton
Department of Land, Air and Water Resources, UC Davis
Alissa Kendall
Department of Civil and Environmental Engineering, UC Davis
Pierre Mérel
Department of Agricultural and Resource Economics, UC Davis
Sanjai Parikh
Department of Land, Air and Water Resources, UC Davis
Michael Springborn
Department of Environmental Science and Policy, UC Davis
Kerri Steenwerth
Department of Viticulture and Enology, UC Davis









