North American Fruit Explorers mailing list at ibiblio

["Martha L. Davis" <martha_davis@earthlink.net>]

As someone said  tree size is relative part based on rootstock which you can 
find relative sizes for, and part climate and other growing conditions.  Just 
an illustration Some hazel nuts from Bear Creek grown in Illinois 15+ feet 
tall grown in New Mexico 4 feet tall.  The age was similar. Don't take those 
tree sizes as absolutes just as relative sizes.

Martha