BIO: Emerson Nafziger is the Ainsworth Professor of Crop Production and Extension Agronomist in the Department of Crop Sciences at the University of Illinois. He grew up on a farm in Ohio, and has degrees in agronomy from Ohio State, Purdue, and the University of Illinois. Since 1982 he has been at the University of Illinois, conducting research and extension programs in crop management. Research interests include crop rotations, tillage, N rate for corn, variety testing and performance, plant population, and the use of inputs such as micronutrients and fungicides on grain crops.