DATA 8EKIES 



131 



DATA SERIES VI 

 Statistics of Sample Acre Plots in Pure Even-aged Stands of Douglas Fir 

 Data collected by the U. S. Forest Service, 1909 and 1911, in Western Washington and 



Oregon. 



SITE QUALITY I 



Location and Plot Number 



Saddle Mt., Siuslaw, N.F. 



96 



95 



97 



89; 



94 



88 



91 



Cougar Cr., Ore. 



44 



49 



48 



58 



55 



62 



Bacon Creek, Washington, N. F. 



167 



160 



163 



149 



161 



165 



Parmelia Trail, Santiam, N. F. 



125 



129 



139 



138 



137 



136 



Lucia, Wash. 



7 



1 



5 



504 



510 



502 



D.B.H. 



of 



Average 



Tree, 



Inches 



10.7 

 9.8 

 10.8 

 11.5 

 11.2 

 10.5 

 11.9 



9.5 

 12.6 

 11.5 



9.2 

 10.7 

 10.2 



11.3 

 14.3 

 13.8 

 13.9 

 15.3 

 14.8 



16.1 

 17.8 

 19.5 

 17.4 

 17.7 

 21.2 



27.3 

 26.2 

 29.7 

 29.1 

 27.4 

 30.3 



Height 



of 



Average 



Tree, 



Feet 



88 

 85 

 88 

 91 

 89 

 87 

 92 



95 

 110 

 105 



93 

 101 



98 



108 

 117 

 115 

 116 

 120 

 118 



135 

 141 

 148 

 140 

 141 

 155 



173 

 169 

 178 

 177 

 173 

 180 



* This table includes all species on the acre plot except cedar. The latter is considered 

 an understory. Douglas fir is the predominating soecies, with scattering hemlock, firs, spruce, 

 pines and hardwoods. All trees to 2 inches D.B.H. are tallied by inch classes. 



Board measure based on trees 12 inches and over in diameter. 



