TOTAL 

 FOREST 



NONPRODUCTIVE, 

 NONSUITABLE, 



AND 

 WITHDRAWN 



\ 



DECISION 

 DEFERRED 



1 



TIMBER 

 GROWING 

 BASE 



Figure 2.— A basic framework 

 for classifying forest land for 

 timber purposes on the Na- 

 tional Forests. 



YIELDS 

 UNAFFECTED BY 

 OTHER VALUES 



YIELDS REDUCED 

 BY 



OTHER VALUES 



MARGINAL 

 UTILITY AT 

 PRESENT 



10 



