1. USDA‐ARS, Grain, Forage, and Bioenergy Research Unit, 251 Filey Hall, Department of Agronomy and Horticulture, University of Nebraska‐Lincoln Lincoln NE 68583‐0937
2. Bioenergy Research Unit, 251 Filey Hall, Department of Agronomy and Horticulture University of Nebraska‐Lincoln Lincoln NE 68583‐0937
3. USDA‐ARS, Lincoln, NE 68583, currently Chemical Engineering student, University of Oklahoma Norman OK 73019