Table 9. 



— Timber growing base area in the Lolo study unit by broad soil quality 

 classes as estimated from soil type map 



Soil quality 

 class 



Timber site 

 range' 



Acres 



Very good 



65+ 



448,729 



Good 



50-65 



70,770 



Fair 



40-50 



81,184 



Poor 



<40 



28,452 



Total 





629,135 



' Tree height at age 50, in feet. 



Summary of the Lolo Unit 

 Following is a summary of the area of the Lolo study unit by broad land management categories: 



Land class 



Category A (commercial): 

 Full yields expected 

 Modified yields expected 

 Total — Category A 



Category B (marginal) : 



Total - Timber Growing Base 



Category C (noncommercial): 



Unproductive forest land 

 Unsuitable forest land: 



Rock land & other unusable land 

 Unavailable productive forest land: 



Crest zone 



Use conflicts 



Total - Category C 



Category D (deferred): 



NONFOREST LAND 

 TOTAL ALL LAND 



Area in acres 



484,448 

 116,235 



36,535 



23,435 



25,070 

 7,598 



600,683 



28,452 

 629,135 



92,638 

 58,953 



54,407 

 835,133 



33 



