1. Ph.D. Student, Biological and Agricultural Engineering Dept., Kansas State Univ., 129 Seaton Hall, Manhattan, KS 66506 (corresponding author).
2. Associate Professor, Biological and Agricultural Engineering Dept., Kansas State Univ., 129 Seaton Hall, Manhattan, KS 66506.
3. Associate Professor, Dept. of Geography, Kansas State Univ., 118 Seaton Hall, Manhattan, KS 66506.
4. Assistant Professor, Dept. of Agronomy, Kansas State Univ., 2004 Throckmorton Hall, Manhattan, KS 66506.