1. Dep. of Agronomy Univ. of Florida Gainesville FL 32611‐0500
2. Noble Research Institute Ardmore OK 73401
3. Instituto de Investigaciones Agropecuarias, Centro Regional de Investigacioìn Quilamapu Av. Vicente Meìndez 515 Chillaìn Chile
4. Horticultural Science Dep. Univ. of Florida, 32611