PRUNING 223 
Seventh; by a severe pruning of the top, trees which are beginning 
to fail from general debility are often rejuvenated. This kind of 
pruning, which is characterized as severe because so much of the 
top is removed, is known as ‘“‘pruning for wood.” By the removal 
Fe. 
Fie, 202. — An Apple tree which has been severely pruned, its main 
branches having been cut back. After G. H. Powell. 
of much of the top the balance between the top and roots 
is upset, and as a result a much larger supply of water and 
mineral salts is received by the remaining branches, which con- 
sequently become invigorated and much more active in growth. 
(Fig. 202.) 
