DO ROOTS STRIKE FROM THE CALLUS ? 233 



respecting the proper length to leave the branches. 

 In general, it may be said that the main roots of 



154. Roots do not start from the callus. 



trees two to four years old may be left six to 

 eight inches long. 



There is much discussion as to where the new 

 roots arise in transplanted trees. It should first 

 be said that the roots do not necessarily arise 

 from the callus,* although this is the almost uni- 



*See also, L. C. Corbett, 9th Ann. Rep. W. Va. Exp. Sta., 196. 



