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UNIVERSITY OF CALIFORNIA EXPERIMENT STATION. 



decidedly more successful on the north than on the south side of the 

 tree. We do not know that this method has been tried sufficiently to 

 enable final judgment to be passed upon it, but certainly with trees of 



FIG. 36. Top-grafting; scion inserted. 



not extremely large size and especially in grafting over orchard-planted 

 black walnut trees, it is more practical to cut off the whole top, either 

 in the trunk or main forks, and graft it all at once. 



The method used in top-grafting is usually the ordinary cleft graft 



