1. Ondokuz Mayıs University, Faculty of Agriculture, Department of Agricultural Structures and Irrigation; Samsun Turkey
2. Agrobigen Ltd Co., Samsun Technopark; Ondokuz Mayis University; Samsun Turkey
3. USDA-ARS, Forage and Livestock Production Research Unit; El Reno; OK United States
4. Retired USDA-ARS, Lago Vista; TX United States