.78 PRACTICAL FOREST MANAGEMENT. 



woodlot (of five acres for example) is too small to be effectively 

 organised for annual or short period yield on a clear cutting or 

 .shelterwood method. 



" Disadvantages. Since the mature trees are scattered through- 

 out the whole stand and are intermixed with reproduction and 

 small trees, logging costs more than under other methods. 



" 2. Due to the mixture of age classes it is difficult to prevent 

 in the logging injury to the immature trees which form the forest 

 capital. 



" 3. Grazing cannot be permitted since reproduction is in 

 progress continually. 



" 4. The timber produced averages lower in grade than that 

 grown in even-aged stands. It is more apt to be knotty, due to 

 the greater crown development of the individual tree. To -some 

 extent the site on which the selection method is ordinarily 

 employed accounts for this. Selection forest has been used 

 principally on poor sites in exposed positions and at high elevations 

 as protective forest. On such situations the timber produced 

 under any method is of lower quality than that produced on better 

 sites. 



" 5. To apply intensively requires great skill on the part of the 

 forester. This results from the complex nature of the age-distri- 

 bution in the stand." 



This author also deals with the controversy as to the relative 

 productivity of the selection and other systems. The Swiss 

 foresters argue that the principle of the maximum sustained annual 

 yield is compatible with the selection system and Biolley claims to 

 have proved that this is so for the forests of the Canton of 

 Neuchatel. 34 Broillard on 'the other hand writes : 



" The outturn of produce of a forest worked by selection is 



; acre for acre, admittedly less than that of a regular high forest. 



This inferiority is due principally to the languid growth of some 



of the trees and the sickly condition of a .much larger number 



" La Methode du Controls -Indian .Forester. July. 922- -CHAMPION. 



