Dr. Robert Mullen is an Agronomist with Nutrien. Dr. Mullen had previously been the Director of Agronomy with PotashCorp since June 2011. Prior to joining PotashCorp, he was an Associate Professor of Soil Fertility and Nutrient Management at Ohio State University. Dr. Mullen received his B.S. in Ag Business at Cameron University in Lawton, Oklahoma in 1998. He earned his M.S. in Plant and Soil Science and Ph.D. in Soil Science from Oklahoma State University in 2001 and 2003, respectively. Prior to completing his Ph.D. program, Dr. Mullen was employed as an agronomist by NTech Industries Inc. where he worked with sensor-based, site-specific technology across the Great Plains and Western Corn Belt.