•2t>() TENDIN(; OF CHOWDKl) WOODS AFTKU KAlUA' YOUTH. 



open woods cannot preserve the fertility of the locaHty ; hence 

 they are only admissible on fertile localities, or special 

 measures must be taken to preserve the fertility of the soil. 



These considerations govern the most profitable growing 

 space in any particular case. It is conceivable tliat under 

 certain condilions tlie con-f^ct policy is to i-cniove all dead, 

 suppressed, and dominated trees, and even a portion of the 

 dominating trees, while in others the dominated and even 

 suppressed trees may have to be carefully husbanded, so as to 

 realise the objects of management in the highest possible degree. 

 Ii. A I It' I if Wood 



As the number of trees per acre decreases gradually from 

 several thousands to a comparativel}' small number at maturity, 

 it follows that the growing space increases with advancing 

 age, though not evenly. Statistics collected on this point in 

 Germany gave the following results foi- pure woods of Scotch 

 pine, spruce and beech, grown on soils of lirst quality : — 



