Shaun Casteel, Ph.D., is a 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, and intensive management of soybean.  You can follow him on his podcast Purdue Crop Chat and Twitter: @PurdueSoybean 

Dr. Daniel J. Quinn is an Assistant Professor of Agronomy and the Extension Corn Specialist at Purdue University. He earned his B.S. and M.S. in Crop and Soil Sciences from Michigan State University and his Ph.D. in Plant and Soil Science from the University of Kentucky. Dr. Quinn leads an integrated research and Extension program focused on improving corn productivity, profitability, and environmental performance across Indiana and the Midwest. His current work examines fertilizer management, hybrid types, crop physiology, agronomic management intensities, equipment technology, conservation cropping systems, and the use of precision and sensing technologies to enhance nutrient efficiency and yield stability. Since 2021, his team has conducted more than 150 field trials across Indiana and secured over $4 million in competitive and industry funding. In addition, he has delivered over 200 presentations to over 24,000 people, been invited to speak at 33 out-of-state and international conferences, authored 20+ peer-reviewed papers, and leads several regional and national collaborations advancing science-based corn management practices.