The rootstock trial was planted on May 10, 2004.
Rootstocks: 5 seedling rootstocks
Scions: 'Sunflower' and 'Susquehanna'
Two pruning systems: minimal pruning versus central leader
8 replicate blocks with each treatment combination for a total of 160 trees (2 x 5 x 2 x 8 = 160).