| Warm-Moist Group | Cool-Moist Group | Warm-Dry Group | Shallow-Dry Group |
---|---|---|---|---|
Modal plant association | Basin big sagebrush/basin wildrye | Mountain big sagebrush/Idaho fescue | Wyoming big sagebrush/bluebunch wheatgrass-Thurber’s needlegrass | Low sagebrush/Sandberg bluegrass |
Years producing at least 672 kg ha−1 | All | High and average production years | High production years | None |
Dominant soil moisture regime | Xeric | Xeric | Aridic | Aridic |
Dominant soil temperature regime | Mesic | Frigid | Mesic | Mesic to frigid |
General soil depth | Deep to very deep | Moderately deep to deep | Shallow to moderately deep | Very shallow to shallow |
Percent of area | 11 % | 16 % | 61 % | 12 % |
Sagebrush cover by community phase | ||||
Early Seral | <1 % | <1 % | <1 % | <0.25 % |
Mid Seral Open | 1 % to 10 % | 1 % to 10 % | 1% to 8 % | 0.25 % to 1 % |
Late Seral Open | 10 % to 25 % | 10 % to 30 % | 8% to 20 % | 1 % to 5 % |
Late Seral Closed | >25 % | >30 % | >20 % | >5 % |