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February 2010
Vol. 20, Issue 1
Pages 206-212

Carolyn F. Scagel
U.S. Department of Agriculture
Agricultural Research Service
Horticultural Crops Research Unit
3420 NW Orchard Avenue, Corvallis, OR 97330

Richard P. Regan
Department of Horticulture
Oregon State University
North Willamette Research and Extension Center
Aurora, OR 97002-9543

Guihong Bi
Department of Plant and Soil Sciences
Truck Crops Branch Experiment Station
Mississippi State University
2024 Experiment Station Road, Crystal Springs, MS 39059