558 



FUNDAMENTALS OF FRUIT PRODUCTION 



Dwarfing effects are most evident and best known, but others occur. 

 In general the top of a grafted tree tends to assume a size equal to that 

 of the top which the stock would have formed if ungrafted. There are, 



■> So 



however, exceptions and qualifications. Northern Spy, itself a vigorous 

 grower, tends somewhat to dwarf many other varieties worked on its 

 roots. 13* Some varieties of apple form characteristically small trees, 



