1. Dep. of Horticulture and Landscape ArchitecturePurdue Univ.W. LafayetteIN47907
2. Dep. of Horticulture and Natural ResourcesKansas State Univ.ManhattanKS66506
3. Southeastern Turfgrass Research CenterLexingtonKY40515
4. Bayer Crop SciencesDentonNE68339