F— 500254 



Figure 10. — USDA Forest Service has jurisdiction over 

 51 percent of the Ponderosa pine ecosystem. 



of other Western Range ecosystems, amount to 

 52 million acres — a sizable holding. 



Other Federal ownership which includes 

 Bureau of Land Management, National Park 

 Service, Fish and Wildlife Service, and Bureau 

 of Indian Affairs also is concentrated in the 

 western ecogroups, but is composed primarily 

 of the Western Range ecogroup. These other 

 Federal agencies have jurisdiction over 186 

 million acres of range ecosystems, of which 96 

 percent is located in the west, and 21 million 

 acres of forested lands, nearly equally divided 

 between Eastern and Western Forests. In the 

 Western Range ecogroup, Sagebrush and Desert 

 shrub ecosystems account for 122 million acres 

 or two-thirds of the other-Federal lands. 

 Pinyon-juniper (17 million acres). Chaparral- 

 mountain shrub (13 million acres). South- 

 western shrubsteppe (10 million acres), and 

 Desert grasslands (10 million acres) are other 

 dominant ecosystem holdings of these other 

 Federal agencies. 



The non-Federal sector is concentrated in 

 the Great Plains and Eastern Forest ecogroups. 

 More than 95 percent of the Great Plains and 

 92 percent of the Eastern Forest ecogroups are 

 in private ownership. The largest ecosystems 

 are Plains grasslands and Oak-hickory, with 

 163 and 116 million acres, respectively, com- 

 prising 34 percent of the non-Federal lands 



Table 4. — Forest-range by productivity and condition and stand-size classes, 1970 



(Thousand acres) 

 [Totals may not add due to rounding] 



Ecogroups and 



Productivity classes 



Total 



condition and 

 stand-size classes 



High 



Moderately 

 high 



Moderately 

 low 



Low 



Non-forested (condition) 

 Western Range 

 Good 



9,693 



6,110 



673 



20,963 



35,457 

 5,347 



39,101 



109,501 



26,195 



4,063 



58,312 



103,210 



73,820 



Fair 



209,380 



Poor 



135,425 



Total 



16,476 



61,767 



174,797 



165,585 



418,625 



Great Plains 

 Good 



4,403 



1,646 



349 



37,125 

 1,256 



457 



69,026 



97,432 

 3,014 



62 



2,452 

 11,637 



110,616 



Fair 



102,786 



Poor 



15,457 



Total 



6,398 



38,838 



169,472 



14,151 



228,859 



Total non-forested 



22,874 



100,605 



344,269 



179,736 



647,484 



Forested (stand size) 



Western Forest 



Nonstocked 



847 



5,994 



15,360 



800 



4,116 



15,607 



1,867 

 10,124 

 31,481 



2,675 

 27,386 

 44,372 



6,189 



Seedling, sapling, & pole 



47,620 



Sawtimber 



106,820 



Total 



22,201 



20,523 



43,472 



74,433 



160,629 



Eastern Forest 

 Nonstocked 



483 



8,425 



11,509 



1,726 

 42,748 

 41,013 



5,669 



102,649 



55,780 



10,717 

 79,933 

 32,831 



18,595 



Seedling, sapling, & pole 



233,755 



Sawtimber 



141,133 



Total 



20,417 



85,487 



164,098 



123,481 



393,483 







Total forested 



42,618 



106,010 



207,570 



197,914 



554,112 







22 



