1. USDA‐ARS Bldg. 007, Rm. 008, BARC‐West Beltsville MD 20705
2. Duke Univ., Phytotron and USDA‐ARS, Remote Sensing and Modeling Lab. Bldg. 007, Rm. 008, BARC‐West Beltsville MD 20705
3. USDA‐ARS, Remote Sensing and Modeling Lab. Bldg. 007, Rm. 008, BARC‐West Beltsville MD 20705
4. Dep. of Plant and Soil Sciences Mississippi State Univ. Mississippi State MS 39762