Table 2 . --Individual tree growt h in 20 years by species, initial 

 diameter, vigor, and intensity of cutting (120- to 220-year-old 

 trees ) 



Initial 



Fonderosa pine : Douglas-fir 





vigor clas 



3 ; vigor 



class 





D.B.H. . 



Good 



Fair 



Poor : Good 



Fair 



Poor 



(Inches ) 



Board feet 



Board 



feet 







Medium 



cutting (78 percent)—^ 







12 



69 



(2/) 



(3/) 70 



(2/) 





16 



122 





104 







20 



175 





137 







24 



228 





171 







28 



282 





205 









Light 



cutting 



(41 percent) 







12 



55 



30 



19 60 



41 



32 



16 



77 



58 



35 74 



58 



40 



20 



99 



86 



52 87 



75 



48 



24 



121 



114 



68 101 



92 



56 



28 



143 



142 



85 115 



109 



63 



1/ Trees on the heavy cutting responded similarly but were 

 insufficient in number in the several vigor classes for complete anal- 

 ysis . 



2/ Values are the same as for good vigor. 

 3/ Insuffic lent data„ 



-7- 



