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to 51 degrees F. The frost -free season is about 110 to 130 days. <br />GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Cushman, Hiland, and <br />Cambria soils and the Parmleed soils. Parmleed soils have over 35 percent clay in the Bt horizon. <br />DRAINAGE AND PERMEABILITY: Well drained; runoff is medium or low; moderate permeability. <br />SE AND VEGETATION: These soils are used primarily for grazing. Native vegetation is <br />needleandthread grass, blue grama, western wheatgrass, and big sagebrush. <br />DISTRIBUTION AND EXTENT: Central and northern Wyoming. The soil is extensive. <br />MLRA OFFICE RESPONSIBLE: Bozeman, Montana <br />SERIES ESTABLISHED: Carbon County, Montana; 1971. <br />REMARKS: Diagnostic horizons and features recognized in this pedon are: <br />Ochric epipedon - 0 to 3 inches (A) <br />Argillic horizon - 3 to 31 inches (Bt1,Bt2) <br />Paralithic contact - 39 inches (Cr) <br />SIR - WY1133 <br />Attachment 2.04.9 -3 -12 <br />