1. Department of Horticulture; Oregon State University; 4107 Agriculture and Life Science Bldg. Corvallis OR 97331 USA
2. Horticultural Crops Research Unit; USDA-ARS; 3420 NW Orchard Avenue Corvallis OR 97330 USA
3. Arid-Land Agricultural Research Center; USDA-ARS; 21881 North Cardon Lane Maricopa AZ 85138 USA
4. North Willamette Research and Extension Center; Oregon State University; 15210 Northeast Miley Road Aurora OR 97002 USA