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RANGE IN CHARACTERISTICS: <br />• Soil Moisture: Intermittently moist in the soil moisture control section May through <br />October and December through February. The soil moisture control section is moist for <br />longer periods of time during the summer than the winter. <br />Soil Temperature: 48 to 59 degrees F. <br />Depth to calcic horizon: 24 to 35 inches. <br />A horizon: <br />Hue: 10YR or 7.5YR <br />Value: 3 to 5 dry, 3 or 4 moist <br />Chroma: 2 to 4 <br />Texture: loam or clay loam <br />Bw horizon: <br />Hue: 5YR, 7.5YR, or 10YR <br />Value: 4 to 6 dry, 3 to 5 moist <br />Chroma: 3 to 6 <br />Texture: loam or clay loam <br />Bk horizon: <br />Hue: 5YR, 7.5YR, or 10YR <br />. Value: 5 to 8 dry, 4 to 7 moist <br />Chroma: 3 to 5 <br />Texture: loam, silty clay loam, clay loam, or sandy clay loam <br />Calcium carbonate: 15 to 50 percent with more than 5 percent visible carbonates. <br />COMPETING SERIES: These are the Abra (A~, Bighams (A~, Bowdish (CO), <br />Copeman (VVY), Creel (NM), Harvey (NM), Hernandez (NM), Honlu (UT), Numa (CO) <br />and Pultney (CO) series. Abra soils do not have a Iambic horizon and have a calcic <br />horizon at a depth of less than 20 inches. Bighams, Bowdish, Creel, and Pultney soils <br />have a lithic or paralithic contact at 20 to 40 inches. Copeman, Harvey, and Honlu soils <br />have a calcic horizon at a depth of less than 24 inches. Hernandez soils are 9 to 12 <br />inches deep to the calcic horizon. Numa soils do not have a Iambic horizon and in <br />addition are moist for longer periods in the spring. <br />GEOGRAPHIC SETTING: Darvey soils are on hills, fan terraces and valley fills. Slope <br />is 0 to 5 percent. The soils formed in alluvium derived from calcareous sandstone and <br />shale and limestone. The elevation is 4,500 to 6,500 feet. The mean annual <br />precipitation is 10 to 13 inches, but has ranged to 17 inches in the past. The mean <br />annual soil temperature ranges from 48 to 59 degrees F. The frost-free period is about <br />150 to 190 days. <br />GEOGRAPHICALLY ASSOCIATED SOILS: These are the Asparas, Deama, La Fonda, <br />. Pastura, and the competing Harvey soils. Asparas soils have an argillic horizon. <br />(REVISED 9/99) 2.04.9-40 <br />