Proceedings of a trilateral workshop - Chakraborty, Sukumar,; Leath, Kenneth T.,; Skipp,Robert A.,; Pederson, Gary A.,; Bray, Robert A.,; Latch, Garrick C. M.,; Nutter, Forrest W., Jr. (American Society of Agronomy ; Crop Science Society of America ; Soil Science Society of America, 1996)