Shaun Casteel, Ph.D., is Professor of Agronomy and Extension Soybean Specialist for Purdue University. Dr. Casteel was born and raised on the family farm in east-central Illinois. He earned his B.S. in Crop Sciences at the University of Illinois, his M.S. in Crop Science and his Ph.D. in Soil Science at North Carolina State University. He has given over 850 invited presentations to 60,000 people across the country and world. Key areas of interest include: sulfur synergies, precision management of resources and practices; integration of soil characteristics, nutrient inputs, and crop physiology; and the influence of agronomic practices on yield physiology of soybean. His practical research also extends to field-scale trials with seeding rates, sulfur, biologicals, and intensive management of soybean.  You can follow him on his podcast Purdue Crop Chat and X/Twitter: @PurdueSoybean 

Dr. Dan Quinn is currently an Assistant Professor of Agronomy and the Extension Corn Specialist at Purdue University. Dr. Quinn earned his B.S. and M.S. in Crop and Soil Science at Michigan State University and his Ph.D. in Plant and Soil Science at the University of Kentucky. His interdisciplinary research and extension program at Purdue works to improve the overall production, profitability, and environmental performance of Midwestern U.S. corn systems. Currently, Dr. Quinn’s research program includes studies examining yield physiology, agronomic management intensities, precision technologies, nutrient management, and cover crop use in corn production systems using large-scale and small-plot field research trials.