Table 49. — Average animal unit month 'production by strategy and ecosystem,, 1970 



(AUM's per acre per year) 



Ecogroup by ecosystem 



Western Range : 



Sagebrush 



Desert shrub 



Southwestern shrubsteppe . 

 Chaparral-mountain shrub 



Pinyon-juniper 



Mountain grasslands 



Mountain meadows 



Desert grasslands 



Annual grasslands 



Alpine^ 



Western Forest: 



Douglas-fir 



Ponderosa pine 



Western white pine 



Fir-spruce 



Hemlock-Sitka spruce 



Larch 



Lodgepole pine 



Redwood 



Hardwoods 



Great Plains : 



Shinnery 



Texas savanna 



Plains grasslands 

 Prairie 



Eastern Forest: 



White-red-jack pine 



Spruce-fir 



Longleaf-slash pine 



Loblolly-shortleaf pine 



Oak-pine 



Oak-hickory 



Oak-gum-cypress 



Elm-ash-cottonwood 



Maple-beech-birch 



Aspen-birch 



Wet grasslands 



Weighted average __ 



Strategy 



Some 



livestock 



(B) 



0.03 

 .01 



.03 

 .02 

 .02 

 .10 

 .60 

 .03 

 .32 

 .21 



.04 

 .04 



.01 

 .01 



.06 



.07 

 .13 

 .22 

 .40 



.64 

 .17 

 .16 

 .26 

 .14 

 .20 

 .84 

 1.43 

 .92 



0.11 



Extensive 



management 



(C) 



0.13 

 .05 



.09 

 .12 

 .05 

 .28 

 .93 

 .22 

 .92 

 .21 



.05 

 .09 



.02 



.02 



.34 



.19 

 .22 

 .31 

 .75 



.64 

 .21 

 .24 

 .24 



.35 



.98 



2.01 



1.54 



0.25 



Intensive 



management 



(D) 



0.28 

 .11 



.17 

 .21 

 .14 

 .33 



2.50 

 .25 



1.52 

 .20 



.23 



.27 



.64 



.26 

 .44 

 .35 

 .84 



1.56 



.46 

 Lis' 



2.60 

 3.93 



0.44 



Maximize 



livestock 



(E) 



0.28 



.08 



.16 

 .16 

 .49 



2.70 

 .25 



2.49 



1.00 



.33 



.61 



.50 



1.28 



7.69 

 1.21 



0.90 



Exploita- 

 tive 

 (X) 



0.05 

 .01 



.05 

 .01 

 .01 

 .11 

 .45 

 .01 

 .46 



.43 

 .08 



.10 



.08 

 .09 

 .61 



.78 

 .04 

 .07 

 .06 

 .08 

 .23 

 .43 

 .71 

 1.12 



0.22 



1970 

 average 



0.12 

 .03 

 .06 

 .07 

 .05 

 .29 



1.14 

 .19 



1.05 

 .21 



.04 

 .07 



.01 



.01 



.33 



.23 



.34 



.31 



1.01 



.77 

 .22 

 .21 

 .23 

 .08 

 .36 

 .62 

 .99 

 2.61 



0.26 



^ Includes barren areas above treeline. 



1S3 



