114 



UNIVERSITY OF CALIFORNIA EXPERIMENT STATION. 



The bottom of the callusing bed is first covered with 2 or 3 inches 

 of sand. The bundles of grafts are then placed in a row along one end 

 of the bed, and sand well filled in around them. The bundles should be 



FIG. 12. Plan of Callusing bed. 



placed in a slightly inclined position with the scions uppermost, and 

 the sand should be dry enough so that it sifts in between the grafts in 

 the bundle. The bundles of grafts are then covered up completely 

 with sand, leaving it at least 2 inches deep above the top of the scion. 



FIG. 13. Wire graft properly callused. 



Another row is then placed in the same manner until the bed is full. 

 Finally a layer of 2 or 3 inches of moss or straw is placed over all. 

 (See Figs. 11 and 12.) 



The callusing bed may be made much deeper and the bundles of 

 grafts laid horizontally in superposed layers. This method economizes 



