Practical Sylviculture 



147 



in clearing 

 w o o d 1 o t s of 

 dead mate- 

 rial, either on 

 the ground or 

 on the stump, 

 of removing 

 brush, small 

 worthless trees, 

 or removing a 

 part of the 

 regular stand 

 so as to im- 

 prove the de- 

 velopment and 

 the quality of 

 the remaining 

 trees. An im- 

 prove m e n t 

 thinning must 

 never be very 

 heavy, since 

 the purpose is 

 to benefit the 

 trees that are 

 to make the 

 final crop, and 

 at all times 



there should be sufficient density to the canopy to shade 

 out any grasses that would be .sure to come in if the 

 crowns were grouped or unevenly distributed. 



Fig. 42.- 



-Woodlot in need of an improvement 

 cutting. 



