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 



'JDJ Vii \i)pl(> troo whuh has Ix'oii .sovou^lv pruned, its main 



l)ranchos Ihivnig been cut back. After G 11 Po^\ell 



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 mucl\ more active in growth. 

 (Fig. 202.) 



