84 NUT GROWING 



best on the whole during the spring and early sum- 

 mer, but one may graft fruit or nut trees satisfac- 

 torily well up toward August. It is observed that the 

 proportion of scion catches is continually less as late 

 weeks go by. This is not true, however, of bud 

 grafting. Buds will catch easily until the stock trees 

 become "bark-bound" in autumn, a technical expres- 

 sion relating to the time when the bark no longer 

 slips readily when cut. In the early spring some of 

 the nut trees, walnuts particularly, bleed so freely 

 that we have to wait until the development of leaves 

 has depleted the supply of water, introducing lower 

 pressure, in order to obtain good results. 



The neyv method of grafting has extended the 

 scion grafting season several months, apparently. 

 Formerly there was hurry to get all of the grafts in 

 while tree buds were bursting in the spring. During 

 the season of 1919, however, under the new method, 

 hickories were grafted by the author from February 

 eighth up to August sixth experimentally. The 

 earliest grafts to catch were those placed late in 

 March. The last grafts which caught well in a prac- 

 tical way were put in on July twenty-first. After 

 that the proportion of catches was small and the 

 growth feeble. Incidentally it may be remarked that 

 hazels grafted with scions as late as August sixth 

 made flourishing growth but were winter-killed later. 

 The scions employed had been cut in late winter and 

 stored in the sawdust of the ice house. In July ex- 

 periments were tried with grafting immediately from 

 one tree to another, using wood of the season's 



