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Official Series Description - N Serves rayC ~ ui ~ <br />• <br />Depth to redoximorphic features: present in the C horizon and can occur in any part of the profile <br />beneath the A horizon <br />Depth to endosaturation: 46 centimeters (18 inches) in wet years to 107 centimeters (42 inches) in dry <br />years <br />Thickness of mollic epipedon: 20 to 51 centimeters (8 to 20 inches) <br />A horizon: <br />Hue: IOYR <br />Value: 4 or 5 dry, 2 or 3 moist <br />Chroma: l to 3 <br />Texture: fine sandy loam, loam, or sandy loam, but the upper ]0 inches ranges from silt loam to loamy <br />sand <br />Reaction: neutral to strongly alkaline <br />AC horizon: ~f present 1 to 10 inches thick) <br />Hue: l OYR <br />Value: 4 or 5 dry, 3 to 4 <br />Chroma 2 or 3 <br />Texture: fine sandy loam, sandy loam or loamy fine sand <br />Reaction: neutral to strongly alkaline <br />C and Cg horizons: <br />Hue: lOYR or 2.SY <br />Value: 5 to 7 dry, 4 to 6 moist <br />Chroma: 1 to 4 <br />Texture: fine sandy loam or sandy loam and typically is coarser textured below a depth of 40 inches. <br />Thin strata of loam or loamy sand 1 to 3 inches thick are common in the control section; In places, sand, <br />gravelly to gravelly coarse sand or loam is below a depth of 40 inches <br />Reaction: neutral to strongly alkaline <br />COh~ETIlYG SERIES: These are the Marksbutte Ovina, and Sunset soils. <br />Marksbutte soils have gravelly sand or coarse sand at depths less than 40 inches and have salinity <br />greater than 4 mmohs. <br />Ovina soils have less fine and coarser sand in the lower part of the control section. <br />Sunset soils contain more clay in the control section. <br />GEOGRAPffiC SETTING: <br />Parent material: stratified, calcareous alluvium <br />Landform: lower slopes of the landscape <br />Slopes: 0 to 2 percent <br />Mean annual precipitation is 38 to 76 centimeters (15 to 30 inches), in Colorado ranges down to 28 <br />centimeters (11 inches) <br />Mean annual temperature is 9 to 13 degrees C (48 to 56 degrees F) <br />GEOGRAPffiCALLY ASSOCIATED SOILS: These include the Al.da, Cass, Darr, lna~~ai_e, Lamo, <br />Leshara, Lex, Ord, and Platte soils al} on a similiar flood plain. <br />Lex soils have coarse sand or gravelly sand between a depth of 20 to 40 inches. Inavale soils are coarser <br />textured and better drained. <br />Cass soils are better drained. <br />Darr soils are better drained and have coarse sand or gravelly sand betza~een a depth of 20 to 40 inches. <br />http://ortho.ftw.nres.usda.gov/cgi-bin/osd/osdname.cgi?-P 1/27/2006 <br />