BIO: Dr. Johnson is a Professor of Agronomy at Purdue University. He has been a member of the faculty since 1981 and specializes in forage crop production and management. During his career he has conducted research and education-related endeavors in the areas of forages as livestock feed, cover crops and biofuels. Dr. Johnson coordinates a graduate student seminar course that emphasizes communicating agronomic issues with the public. He obtained his BS degree in Agronomy and Animal Science at the University of Nebraska-Lincoln and his MS and Ph.D. degrees from Purdue University.