Trials were established at one location in 2007 (Sampson
County, NC) and two locations in 2009 (Jackson and Henderson
Counties, NC). Each trial was conducted as a randomized complete
block design with four replications. As is typical for the region,
raised-bed plasticulture was employed with a stake-and-weave
plant-training system (16). Water was provided by drip irrigation
and soil fertility was managed according to standard on-farm
protocols (described below).