1. Univ. of ArkansasDep. of Crop, Soil, and Environ. Sci.1366 W. Altheimer DrFayettevilleAR72704
2. Univ. of ArkansasAgricultural Statistics Lab.101 Agricultural AnnexFayettevilleAR72701
3. Univ. of ArkansasNortheast Research and Extension Center1241 W. County Rd. 780KeiserAR72351
4. Univ. of ArkansasSoutheast Branch Experiment Station140 Experiment Station LoopWatsonAR71674
5. Mississippi State Univ.Delta Research and Extension CenterP.O. Box 197, 82 Stoneville Rd.StonevilleMS38776