BIO: John Havlin is Professor (former Department Head) in the Department of Soil Science and Coordinator for Distance Education Programs in the College of Agriculture and Life Sciences at North Carolina State University. He received his B.S. in Chemistry from Illinois State University and his M.S. and Ph.D. in Soil Chemistry from Colorado State University. His area of expertise is in soil fertility/chemistry, soil management, remote sensing, and viticulture. Prior to NC State University, he was a Professor at Kansas State University (1986-96) and the University of Nebraska (1983-85). He is Fellow in Soil Science Society of America, American Society of Agronomy, and the National Association of College Teachers in Agriculture. He served on numerous state, regional, and national committees and advisory boards related to nutrient management, natural resources, sustainable agriculture, and environmental quality. He served as President of the Soil Science Society of America (2005). He has developed nationally recognized extension education programs in dryland cropping systems, precision agriculture, and nutrient management, and is providing leadership in developing internet-based soil science curriculum. He has received numerous research, teaching, and extension awards, and is a recipient of the USDA Honor Award (2004). Authored/co-authored 167+ refereed and other technical papers, eight book chapters, and is the author of the internationally recognized textbook Soil Fertility and Fertilizers.