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6.4.10 Exhibit J -Vegetation Information <br />• that Aquolls and Aquepts, flooded is rarely used for irrigated alfalfa and yields are <br />not available for this soil type (USDA Soil Conservation Service, 1980). <br />Table 7. Yield per acre for irrigated alfalfa on the soil types in the project <br />area (Source: USDA Soil Conservation Service, 1980). <br />Soil type Yield (tons/ac) <br />Aquolls and Aquepts, flooded Not Available <br />Olney fine sandy loam, 0 to 1 percent <br />slopes 5.5 <br />Olney fine sandy loam, 1 to 3 percent <br />slopes 5.5 <br />Olney fine sandy loam, 3 to 5 percent <br />slopes 4.0 <br />Otero sandy loam, 3 to 5 percent <br />slopes 4.0 <br />Otero sandy loam, 5 to 9 percent <br />slopes 3.0 <br />Vona sandy loam, 1 to 3 percent <br />slopes 4.5 <br />Vona sandy loam, 3 to 5 percent <br />slopes 4.0 <br />n <br />U <br />6.4.10.3 THREATENED AND ENDANGERED PLANT SPECIES <br />The project site is within the range of one threatened plant species, Ute ladies' <br />tresses orchid (Spiranthes diluvialis). Potentially suitable habitat for this species <br />is present in the wet pasture. A presence/absence survey will be performed in <br />late July or August. <br />6.4.10.4 REFERENCES <br />USDA Soil Conservation Service. 1980. Soil Survey of Weld County, Colorado <br />southern part. USDA Soil Conservation Service in Cooperation with <br />Colorado Agricultural Experiment Station. Greeley, Colorado. <br />r 1 <br />U <br />File Pit 112 DMG Permit Application <br />Page 18 of 27 <br />