Figure 7. 



-A mixed ponderosa pine and larch stand {type 20) in 

 eastern Washington. 



derance of mature and overmature trees, shown in 

 figure 12, typifies the important saw-timber stands 

 of the region and points significantly to the prob- 

 lems in their management. 



IMMATURE PONDEROSA PINE SAW-TIMBER TYPE (21) 



The immature ponderosa pine saw-timber stands 

 occur on old burns or cut-over land and cover 1.2 

 million acres. Both even-aged and uneven-aged 

 stands make up this type. The even-aged stands, 

 commonly called bull pine, usually occur on old 

 burns and often are very dense, ranging from about 

 4 to 10 M board feet per acre. They are usually 

 pure in composition. The uneven-aged stands 

 generally occur on selectively cut-over land. Ap- 

 proximately 850,000 acres of cut-over land is now 



occupied by ponderosa pine stands of saw-timber 

 size which average 2.4 M board feet per acre. 

 They vary considerably in density and often contain 

 scattered mature trees as well as the younger age 

 classes. A large part of this type is in southern 

 Oregon, and more than a fourth of the regional 

 total is in the Klamath Plateau unit. The Klamath 

 Plateau stands average 3.2 M board feet per acre, 

 much higher than the regional average. Stands 

 on cut-over land are not so well stocked as those on 

 old burns, the former averaging about 33 percent 

 well stocked, 51 percent medium stocked, and 16 

 percent poorly stocked (table 7), and the latter 

 50 percent well stocked, 42 percent medium 

 stocked, and 8 percent poorly stocked. 



Figure 8. — Mixed stand of ponderosa pine, Douglas-fir, and 

 western larch {type 27). 



20 



