80 MANUAL OF MODERN VITICULTURE. 



Account of the small space available. Further, the size and 

 the length of their roots renders transplanting rather 

 difficult ; they have to be cut or broken, and, finally, when 

 planted out, their growth is checked to such an extent that 

 no advantage is derived from it. Therefore it is preferable 

 in most cases not to leave the cuttings over a year in the 

 nursery. 



Such are the main results, of experience with regard to 

 the propagation of American vines by cuttings. Although 

 this method may be considered as the most important, and 

 is the most used, American vines may be propagated by 

 layering. 



