Center for Hydrology, Soil Climatology, and Remote Sensing(HSCaRS), Alabama A&M University, Normal, AL35762,USA;Contributed by the Agricultural Experiment Station, Alabama A&M University Journal No.593;Research supported by NAG5-10721 from the National Aeronautics and Space Administration(NASA), Washington, DC, USA;Any use of trade, product or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.