Figure 3 . --Fifty-seven-year-old western larch on a medium site: A, Heavily overstocked 

 unthinned stand. Both diameter and height growth are suppressed; B, comparable stand 

 thinned from below, 27 years ago, to a 7- by 7 -foot spacing. This stand is still over- 

 stocked (growing at one-half potential), but diameter and height growth are 50 percent 

 greater than in the unthinned stand. 



