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Semiarid Foothills
Ecoregion
on
Columbia Plateau
,
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The shrub- and grass-covered Semiarid Foothills ecoregion is higher and more rugged than nearby Ecoregions 12a, 12c, and 12h. A few perennial streams flow across the ecoregion but are absent on the lacustrine deposits of the Unwooded Alkaline Foothills (12j). Shallow, clayey soils are common and often support medusahead wildrye, cheatgrass, and scattered shrubs. Wildfire frequency is high. Land use is primarily livestock grazing and is distinct from the irrigated agriculture of the Treasure Valley (12a).
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