1. Crop Science Division Bayer AG Waco NE 68460 USA
2. Midwestern BioAg St. Paul MN 55108 USA
3. Dep. of Crop and Soil Sciences North Carolina State Univ. Raleigh NC 27695 USA
4. Dep. of Soil and Crop Sciences Texas A&M AgriLife Research and Extension Center Dallas TX 75252 USA
5. Dep. of Agronomy Univ. of Florida Gainesville FL 32611 USA
6. Dep. of Horticulture and Landscape Architecture Purdue Univ. West Lafayette IN 47907 USA