CHOICE OF METHOD OF FORMATION OF WOODS. 179 



1. Combination of Artificial Formation, and Natural 

 Regeneration ly Seed. 



Natural regeneration assists artificial formation only in 

 rare cases, but the reverse constantly happens. Rarely 

 are natural regenerations by seed so complete that they 

 do not require artificial help, which can be afforded by 

 sowing or planting, generally the latter. There are 

 always certain parts of the regeneration area which, for 

 one reason or another, do not become stocked and have 

 to be planted . up. Then it frequently happens that the 

 ruling species shall be mixed with others which must be 

 brought in artificially, or one of the species in a mixed 

 wood fails to produce seed for a considerable period, 

 while the other, having regenerated itself, demands the 

 removal of the mother tree. 



In many cases, it can be foreseen that certain portions 

 of an area are unfit for natural regeneration; these may 

 at once be artificially stocked, even before the natural 

 regeneration of the remainder has commenced. In 

 other cases a part of the area may have been deprived 

 of the necessary shelter trees by natural phenomena ; 

 here artificial shelter woods may have to be planted. 



From the above remarks it will be seen that artificial 

 and natural formation may be started at the same time, 

 or the one may precede the other. In all such cases, 

 blanks in existing woods should be filled up with strong 

 plants of a quick-growing species. 



K 2 



