LUTHER BURBANK 



central woody tissues — the so-called heart of the 

 twig — there will be no union between stock and 

 cion in any case. 



But this is of no consequence since the new 

 growth of wood soon covers the trivial wound 

 with which the cambium layer will make ready 

 union under favorable circumstances; and the 

 growth will continue outward, year by year, until 

 ultimately the cion and stock are so firmly joined 

 that they constitute a branch scarcely less strong 

 than the ungrafted branches of the tree. 



But unless the living tissues of the cambium 

 layer are accurately joined, no union can take 

 place, and the graft will be a failure. 



If this essential principle is borne in mind, 

 the process of grafting becomes a comparatively 

 simple one, and one that may be carried out suc- 

 cessfully by amateurs with very little preliminary 

 practice. 



A few specific hints as to the details of the 

 method may, however, be of service. So I shall 

 give a brief account of the methods employed in 

 my orchards, where the process of grafting is 

 carried out thousands of times each year. 



Grafting may be divided under three headings: 

 (1) Grafting proper, in which a cion or small 

 shoot is inserted into or upon the stock; (2) 

 Inarching, in which the cion is left attached to 



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