The effects of rootstock on cumulative yield 

 per tree also varied with cultivar (Table 2). The 

 general trends were similar to those with tree 

 size, with trees on 0.3 and M.26 EMLA yielding 

 the most, those on B.9 and Mark yielding the 

 least, and trees on M.9 EMLA yielding 

 intermediately. Over all rootsotcks, Rome 

 trees produced the highest yield, and Empire 

 trees produced the lowest. Regarding the 

 effects of site, trees in Virginia and Ohio 



produced the highest yields, and those in 

 Arkansas produced the lowest. 



More important than yield per tree, the 

 effects of rootstock on cumulative yield 

 efficiency (relating yield to tree size) varied 

 with cultivar (Table 3). The most efficient 

 Golden Delicious, Jonagold, and Empire trees 

 were on B.9 and Mark, and the least efficient 

 were on M.26 EMLA. Trees on M.9 EMLA and 

 0.3 were intermediate. Rome trees on B.9 were 



Fruit Notes, VoUimc 63 (Number 1), Winter, 1998 



