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• SOIL:' UESCRIPTION~ <br />ADAMS COUNTY, COLORADO <br />HELDT CLAY, 0 TO 3 PERCENT SLOPES (H18).--This soil has the profil-- <br />described as representative for the series. It is on terraced alor.~ <br />some of the major streams in the county. Surface runoff is me~.iium t.o <br />slo`+, and the hazard of v+ater erosion is slight. Included in :.ianpir.g <br />are small areas of Nunn loam and Arvada loam. Most areas of t.`.is a:il <br />are cultivated and irrigated (fig. 9). Capability unit IIIs-1. <br />irrigated, and IVs-3, nonirrigated; Clayey Plains range site: '.ree <br />planting suitibility group 4. <br />SOlL SURVEY OF ADAMS COUNTY, COLORADO; USDA, Soil Conservation :::-u4;:^ <br />in cooperation with Colorado Agricultural Experiment Station, <br />October, 1974. <br />