BIO: Dave Mengel is Professor of Agronomy/Soil Fertility in the Department of Agronomy, at Kansas State University. He earned B.S. and M.S. degrees at Purdue University, and his Ph.D. at N.C. State. He worked in soil fertility research and extension positions at LSU and Purdue prior to going to K-State. He also served as the Head of the Agronomy department at KSU from 1998 through 2005. His extension, and research programs have focused on finding simple, economical methods to enhance the efficiency of fertilizer use; the interaction of tillage, residue cover and fertilization practices; and developing efficient and environmentally sound fertilizer recommendations. He is an active member of the American society of Agronomy and served as the organizing chair for Division A-9, Professional Practitioners, professional home for the CCA program. Dave is a Fellow of ASA and SSSA.