BULLETIN 231] WALNUT CULTURE IN CALIFORNIA. 247 



original seedling top was cut off. It is not necessary that every tree 

 should have this stub completely grown over in the nursery in order to 



Fig. 46. 1, a poor graft union; 2, a good graft union on a root which has been 

 grafted unsuccessfully once or twice before. 



make it worthy of planting, but those with very poor union such as this 

 are of doubtful value and should be discarded if first-class trees are 



