Jeff Tarsi

Jeff Tarsi is the Executive Vice President and President of Global Retail at Nutrien Ag Solutions. In this role, Jeff oversees the company’s global portfolio and strategic priorities focused on delivering to stakeholders across the world. With an emphasis on safety, he also works closely with regional leaders throughout the company’s Retail network, which includes more than 2,000 locations in Australia, Canada, South America, and the United States.

Prior to his current role, Jeff served as the Vice President of Retail International & Strategy, where he led the retail businesses in Chile, Argentina, Uruguay, Brazil and Australia. Since joining a Nutrien legacy company in 1997, Jeff has held a variety of key leadership positions, including Senior Vice President of North American Operations for Nutrien Ag Solutions. With over three decades of experience in the agriculture industry, Jeff has gained a deep knowledge of retail operations. Raised on a farm in Mississippi, Jeff holds a degree in ag economics from Mississippi State University.

Bryan Hopkins

Bryan G. Hopkins is a Professor at Brigham Young University where he teaches and does research in soil, nutrient, and water management. He is a Certified Professional Soil Scientist. He is a Fellow of the America Society of Agronomy and the Soil Science Society of America. He is the Chief Consulting Agronomist for Sci-Scapes, Inc. His wife, Carrie, and he have 6 children and 10 grandchildren.

Dante Leventini

Dante Leventini is a recent MS graduate from UC Davis Plant Sciences. Working in Patrick H. Brown’s lab, Dante’s research used split-root solution culture of tomato to survey how potassium modulates water and nutrient uptake under nonuniform salinity.

Pedro Andrade-Sanchez

Pedro Andrade-Sanchez is an Associate Professor – Specialist in Precision Agriculture at The University of Arizona. He is affiliated with the Department of Biosystems Engineering and is stationed at The Maricopa Agricultural Center. Dr. Andrade-Sanchez earned his Ph.D in agricultural engineering from the University of California Davis in 2004 where his research focused on soil dynamics applied to tillage and sub-soil compaction. In 2006 he worked at the Center for Precision Agricultural Systems at Washington State University where he performed research in wireless sensor networks with applications to agriculture. Currently, Pedro leads an innovative research and extension program in precision agriculture focused on the implementation of information-intensive solutions engineered to increase efficiencies in crop production in farming systems of semi-arid lands. Dr. Andrade-Sanchez has performed extensive work in machine navigation systems, yield monitoring, variable-rate input application, electronic monitoring of ambient conditions, sensor-based characterization of crop development in various crops in Arizona. Other emphasis areas in his program include precision planting, on-the-go sensor-based weed detection, and soil respiration monitoring using low-cost electronics. Dr. Andrade-Sanchez has co-authored 30 peer-reviewed journal articles, 12 peer-reviewed extension bulletins; three book chapters.

Katie Lewis

Dr. Katie Lewis received her M.S. and Ph.D. in Soil Science from Texas A&M University in 2010 and 2014 after completing her B.S. in Chemistry from Sam Houston State University in 2008. She joined the Texas A&M AgriLife Research and Texas Tech University faculty in September 2014. As an Associate Professor of Soil Chemistry and Fertility, Dr. Lewis is provided the opportunity through research, service, and teaching to enhance the agricultural sustainability of the Texas High Plains which is vitally essential to both Texas and the nation. The major focus areas of Dr. Lewis’ program include: 1) determining sustainable regenerative management practices in semi-arid ecoregions; 2) optimizing nitrogen, phosphorus, and potassium management in cotton; and 3) evaluating alternative practices and products (e.g. fertilizer formulations and soil amendments). She is determined to optimize management strategies for cotton producers across the Texas High Plains and the Cotton Belt of the United States to ensure the longevity of their farming operations while conserving our soil and water resources. Dr. Lewis currently serves as the Chair of the Land Management & Conservation Section (ASA) and has chaired the Cover Crop Management Community. She has been the chair of the Great Plains Soil Fertility Planning Board since 2020. She has authored or co-authored 46 peer-reviewed articles and two book chapters. Dr. Lewis’ program has received $5.6 million in federal, state, and local funds ($36.2 million to all project investigators). She has mentored to completion eight M.S. students and six Ph.D. students. She is an associate editor of the Agrosystems, Geosciences, and Environment Journal and the Agronomy Journal.

She is married to her wonderful husband, Clay, and has two beautiful children, Kadence and Cade.

William Frame

Dr. William “Hunter” Frame is a Virginia native and graduate of Virginia Tech (B.S. and Ph. D.) as well as the University of Tennessee Knoxville (M.S.). He major in Crop and Soil Environmental Sciences and Plant Sciences with his advanced degrees focused on nitrogen fertilizer management in winter wheat, corn and burley tobacco systems. He has been a faculty member at Virginia Tech since May 2012 as the Field Crop Agronomist where his program focuses on agronomic issues in cotton production and enhanced efficiency nitrogen fertilizer management in non-legume field crops. Currently he is serving as the project director on the TFI 4R funded grant ($874,980): An integrated approach for nitrogen management in Upland Cotton (Gossypium hirsutum) across the U.S. Cotton Belt from 2019 – 2024. When not running his research and Extension program Dr. Frame enjoys watching his daughter on the softball field and bow hunting whitetail deer.

Jagmandeep Dhillon

Jagmandeep Dhillon is an Assistant Professor in the Department of Plant and Soil Sciences at Mississippi State University. His current research focuses on corn agronomics with topics encompassing precision nutrient management, optimization of corn management practices, and understanding the impact of climate change on southern crop production. He received his Ph.D. in Soil Science and M.S. in Plant and Soil Sciences from Oklahoma State University in 2019 and 2016, respectively.

Patrick Brown

Dr. Patrick Brown is the Professor of Plant Nutrition at the University of California, Davis – USA. He received his B.Sc. in 1984 from Adelaide University, Australia and Ph.D. from Cornell University, USA in 1988.  Dr. Brown has authored more than 250 scientific journal articles and numerous books and is among the highest cited experts in plant nutrition, biostimulants, boron, foliar fertilizers and horticulture. Dr. Brown is recognized globally as a leader in both basic and applied plant nutrition and has served as a member of numerous scientific and technical committees for governmental agencies including US-EPA, USDA, Californian Dept. Food and Ag and the International Standards Organization. Dr. Brown is a member of the IFA’s Science Panel for the Responsible Use of Fertilizers.

Dr. Brown has received many awards national and international for excellence in research and extension.

Margherita Germani

I completed my Bachelor’s Degree in Land and Agroforestry Science and my Master’s Degree in Vegetable Biotechnology and Crop Production at the University of Bologna (Italy). I am now a PhD candidate in Patrick H Brown’s lab at the University of California Davis, focusing on K dynamics in the almond system.