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Managing a Legacy of Phosphorus
We can't control how phosphorus was applied as fertilizer in the past, but that doesn't mean phosphorus applied in the past doesn't need to be managed today. In watersheds across the globe, phosphorus levels from past applications--so called "legacy phosphorus"--has overwhelmed the capacity of the soil to store it. As a result, these soils can bleed phosphorus and pollute nearby waterbodies.

In this webinar, we'll describe the global magnitude of this problem, the soil chemistry of legacy phosphorus, and the techniques at our disposal for dealing with legacy phosphorus losses to water. Our panelists include Dr. Dean Hesterberg, retired from North Carolina State University, Dr. Isis Scott of the University of Maryland, and Dr. Jean-Olivier Goyette of the University of Montreal. We'll have plenty of time for questions and answers from the audience.

May 20, 2021 09:00 AM in Arizona

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Dr. Dean Hesterberg
Research Scientist and Soil Science Advisor @Brazilian Center for Research in Energy and Materials
Dr. Hesterberg was formerly a William Neal Reynolds Distinguished Professor of Soil Chemistry in the Department of Crop and Soil Sciences at NC State University, where he worked for 28 years. Dr. Hesterberg earned a B.S. degree in Plant and Soil Science from Southern Illinois University – Carbondale (1981), an M.S. degree in Agronomy from Purdue University (1984), and a Ph.D. degree in Soil and Environmental Sciences from the University of California – Riverside (1988). Before joining NC State University in 1993, he worked for Chevron Oil Field Research Company between 1988 and 1990, and for the Institute for Soil Fertility Research in the Netherlands between 1990 and 1992. His current research focuses on developing and applying advanced synchrotron imaging and spectroscopy techniques to study the molecular chemistry of phosphorus and heavy metals in soils and other complex environmental systems.
Dr. Isis Stacanelli Pires Chagas Scott
Postdoctoral Research Associate @University of Maryland/Hydrology and Remote Sensing Laboratory (USDA-ARS)
Dr. Isis S. P. C. Scott is a postdoctoral research associate at the University of Maryland/Hydrology and Remote Sensing Laboratory (USDA-ARS). She earned her Ph.D. in Agricultural & Biological Engineering at Purdue University, where she researched dissolved phosphorus (P) removal technologies, contributing to the better understanding of P sorbing media and their use in P removal structures. Her current research explores other aspects of excessive nutrient issues in agricultural landscapes, including phytoremediation and its effects on farm sustainability.
Dr. Jean-Olivier Goyette
Postdoctoral Researcher @Laval University
Dr. Jean-Olivier Goyette holds a PhD in biological sciences from the University of Montreal (supervised by Roxane Maranger and Elena Bennett), and works as a postdoctoral researcher at Laval University in the lab of Monique Poulin. His research has mainly focused on the effect of human activities and landscape configuration on aquatic nitrogen and phosphorus pollution from a historical perspective. His work now also explores methods to elaborate wetland conservation and restoration plans to optimize the flow of ecological services to beneficiaries.