1. a Department of Biological and Agricultural Engineering , the University of Georgia , Griffin, Georgia 30 223, USA
2. b National Oceanic and Atmospheric Administration/National Environmental Satellite Data and Information Services , Camp Springs, Maryland 20 746, USA
3. c National Environmentally Sound Production Agriculture Laboratory, Department of Crops and Soil Science , the University of Georgia , Tifton, Georgia 31 793, USA
4. d Department of Biological and Agricultural Engineering, Louisiana State University , Baton Rouge , Louisiana 70 803, USA
5. e Department of Biological and Agricultural Engineering , the University of Georgia , Tifton, Georgia 31 793, USA