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Prime farmlands must receive a good supply of moisture, which must generally be provided through irrigation in Missoula County. \n\nFarmland of Statewide Importance\u2014State agencies define and identify these soils as being important from a statewide perspective. This designation is similar to Prime Farmlands, but has slightly less stringent criteria. Soils may have higher pH or salt content, more rock fragments, or lower water holding capacity. They may be slightly more erodible, but can be highly productive and produce high crop yields when properly managed. \n\nFarmland of Local Importance\u2014At the request of local farmers, the Missoula Conservation District identified important soils from a county-wide perspective. 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