26 



BULLETIN 604, U. S. DEPARTMENT OP AGRICULTURE. 



Table 16. — Comparative rate of growth of sugar pine, yelloiv pine, and 



incense cedar. 



Age. 



Sugar pine. 



Yellow pine. 1 



Incense cedar. 



Diam- 







Diam- 







Diam- 









eter 

 breast- 



Height. 



Vol- 

 ume. 



eter 

 breast- 



Height. 



Vol- 

 ume. 



eter 

 breast» 



Height. 



Vol- 

 ume. 





high. 







high. 







high. 













Board 







Board 







Board 



Years. 



Inches. 



Feet. 



feet. 



Inches. 



Feet. 



leet. 



Inches. 



Feet. 



feet. 



20 

 40 

 60 



0.2 

 2.5 



7.5 



8 

 23 

 45 





2.3 

 6.5 

 11.4 



12 



29 

 57 













3.2 

 6.4 







23 





80 



13.0 



72 



110 



16.1 



79 



210 



9.8 



49 





100 



18.1 



92 



240 



20.0 



94 



360 



13.6 



65 



70 



120 



22.7 



106 



490 



23.3 



104 



610 



17.8 



75 



140 



140 



26.8 



118 



850 



25.8 



112 



890 



21.3 



82 



230 



160 



30.5 



127 



1,290 



28.0 



118 



1,170 



23.6 



86 



310 



180 



33.9 



135 



1,760 



29.8 



123 



1,430 



25. '< 



90 



390 



200 



37.0 



142 



2,250 



31.3 



127 



1,640 



27.8 



93 



490 



220 

 240 

 260 

 280 

 300 

 320 

 340 

 360 

 380 

 400 



40.0 

 42.5 

 44.9 

 47.2 

 49.3 

 51.4 

 53.5 

 55.5 

 57.3 

 59.1 



148 

 153 

 158 

 162 

 167 

 171 

 174 

 177 

 180 

 183 



2,830 

 3,460 

 4,120 

 4,840 

 5,570 

 6,020 

 7,050 

 7,740 

 8,380 

 9,010 









29.8 

 31.7 

 33.6 

 35.4 

 36.9 

 38.2 

 39.2 

 40.1 

 40.9 

 41.6 



96 

 98 

 101 

 103 

 105 

 106 

 108 

 109 

 110 

 111 



600 



720 



850 



970 



1,090 



1,200 



1,290 



1,380 



1,440 



1,510 































































> From Forest Service Bulletin 69, "Sugar Pine and Western Yellow Pine in California," by Albert 

 W. Cooper. 



GROWTH IN EVEN-AGED STANDS. 



Growth in diameter, height, and volume in even-aged stands is, 

 as might be expected, much more rapid than that prevailing in 

 virgin all-aged stands, where competition for light and growing 

 space is keen. As is shown in Table 17, which is based on measure- 

 ments gathered in Madera, Tuolumne, and Yuba Counties, this 

 difference is considerable. Unfortunately, no mature even-aged 

 stands exist, and only general conclusions can be drawn as to the 

 growth in later life under such conditions. It is evident, however, 

 that incense cedar would make much better growth in even-aged 

 stands than in the all-aged virgin forests. 



Table 17. — Average growth of individual trees in even-aged stands; basis, 



35 trees. 



[curved.] 



Age. 



Total 

 height. 



Diameter 

 breast- 

 high 

 outside 

 bark. 



Volume. 



Years. 

 10 

 20 

 30 

 40 

 50 

 60 

 70 

 80 



Feet. 

 5.5 

 15.5 

 30.0 

 43.5 

 53.0 

 60.0 

 61.0 

 67.0 



Inches. 



Cubic feet. 



3.1 

 6.3 

 9.2 

 11.7 

 13.6 

 14.9 

 15.9 



0.5 

 1.3 



4.2 



9.9 



17.2 



26 



31.6 



