Figure 1.—Top: thinned stand thinned to 14 by 14 feet, 

 average spacing; bottom: unthinned stand. 



Table 1.— Current stand density and average diameter by species for the thinned and unthinned stands, 

 Lubrecht Experimental Forest 







Basal 



area 







Number of trees 





Mean d.b.h. 



Species 



Thinned 



Unthinned 



Thinned 



Unthinned 



Thinned Unthinned 





Ft 2 / 

 acre 



Pet 



Ft 2 / 

 acre 



Pet 



No./ 

 acre 



Pet 



No./ 

 acre 



Pet 



Inches 



Douglas- 





















fir 



81.7 



67 



105.3 



61 



167 



78 



460 



63 



9.5 6.5 



Ponderosa 





















pine 



39.7 



33 



67.0 



39 



47 



22 



273 



37 



12.5 6.7 



Total 



121.4 





172.3 





214 





733 







2 



