1. Department of Civil and Environmental Engineering, University of Maryland,1173 Glenn L. Martin Hall, College Park, Maryland 20742, United States
2. Department of Animal and Food Sciences, University of Delaware, 046 Townsend Hall, Newark, Delaware 19716, United States
3. Biosystems and Agricultural Engineering Department, Oklahoma State University, 223 Ag Hall, Stillwater, Oklahoma 74078, United States
4. U.S. Department of Agriculture, Agricultural Research Service (USDA-ARS), 10300 Baltimore Avenue, Beltsville, Maryland 20705, United States