1. Dep. of Agronomy and Horticulture; Univ. of Nebraska; Lincoln NE 68583-0915
2. Dep. of Agronomy; Iowa State Univ.; Ames IA 50011
3. Contribution of the Dep. of Agronomy and Horticulture, Univ. of Nebraska, Lincoln, NE 68583. Published as Paper no. 15201, Journal Series Nebraska Agric. Exp. Stn. Project No. 12-194. Funding for this research was received from the Nebraska Agricultural Research Division, Nebraska Soybean Development, Utilization, and Marketing Board, United Soybean Board, and Fluid Fertilizer Foundation