1. Sugarcane Production Research Unit USDA‐ARS Canal Point FL USA
2. Current address: Irrigated Agriculture Research and Extension Center WA State Univ. Prosser WA USA
3. Dep. of Crop Sciences Univ. of Illinois Urbana‐Champaign IL USA
4. Current address: Guangxi Univ. Nanning Guangxi China
5. Sugarcane Research USDA‐ARS Houma LA USA