24000 



tu 20000 



o 16000 - 



" 12000 - 



8000 



4000 



SITE INDEX 



100 



80 



70 



60 

 50 

 40 



10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 



Figure 1 — Natural regeneration yield curves for Inland Northwest forests of the 

 grand fir-cedar-hemlock ecosystem (total cubic feet, all stems). 



24000 - 



20000 r 



16000 



12000 



SITE INDEX 



100 



4000 



10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 



AGE 



Figure 2 — Natural regeneration yield curves for Inland Northwest forests of 

 the grand fir-cedar-hemlock ecosystem (merchantable cubic feet, 4.5-inch 

 top, stems greater than 7 inches d.b.h.). 



90 

 80 



70 



60 

 50 

 40 



5 



