536 Forestry Quarterly. 



in the virgin forest reproduction is conspicuously absent near 

 veteran seed bearing trees. The distribution of Yellow Pine in 

 California is probably governed, not by root compeition for mois- 

 ture between the veteran trees, but by the difficulty experienced 

 by seedlings in getting established on soils drained by the roots 

 of the mature trees, coupled with fire and other adverse factors. 

 Good silviculture, therefore, unmistakably calls for clear cutting 

 with few and scattered seed trees. This will necessarily be modi- 

 fied by the demands of good management and the group selection 

 system will most often be followed. Second growth could be 

 regenerated by clear cutting in strips or large patches and burn- 

 ing over the area thoroughly, killing unmerchantable Incense 

 Cedar and other worthless material. Good marking for fellings 

 will approach as clean a cutting as is compatible with the require- 

 ment that sufficient material for a second cutting be left upon 

 the ground. 



