Second Growth Yellow Pine. 533 



Notwithstanding the stands of exceptional density in which 

 fir occurs, second growth pine prunes itself very slowly. Branches 

 are soon killed when overshadowed, but are of such large size 

 that they do not rot away from the trunk for a long time. Even 

 the more tolerant Sugar Pine and Douglas Fir clean themselves 

 more rapidly as they have comparatively small branches. Prob- 

 ably Yellow Pine can not be grown densely enough to make it 

 prune itself well without so curtailing growth through mutual 

 suppression and stagnation that more is lost than gained. Clear 

 lumber can not be produced with a short rotation until the time 

 comes when it is possible to practice methods of tree pruning 

 such as are employed in European forestry. (?) Inasmuch as 

 White Pine abroad has proved in this respect more troublesome 

 than Scotch Pine, and Yellow Pine is far worse than either, it 

 may prove impossible to obtain anything but knotty lumber and 

 second growth or the "bull" pine of the lumberman. 



GROWTH TABLE 



Second Growth Yellow Pixe 



Volume table based on Clark's International Log Rule. Trees considered 

 merchantable to 5-inch top. 



It is to be regretted that the growth of stands over 65 years of 

 age could not be determined, since the earliest cuttings date back 

 to 1850 and there are no even-aged stands caused by fires such 

 as are found in the Douglas Fir type in the northwest. The 

 growth from 65 to 80 years of age was therefore based on incre- 

 ment borings in the oldest stands to be found. Beyond this age 

 it is impossible to obtain any indication of the behavior of even- 



