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Official Series Description - SEDILLO Series • Yage "l or <br />• <br />alkaline. <br />TYPE LOCATION: Valencia County, New Mexico; about 15 miles southeast of Belen, 1.8 miles east <br />and 0.4 mile south of old ranch headquarters; 106 degrees, 33 minutes, 12 seconds west longitude; 34 <br />degrees, 35 minutes, 24 seconds north latitude. <br />RANGE IN CHARACTERISTICS: <br />Soil Moisture: Usually dry, intermittently moist from December through March and July through <br />September. The soil is driest during May and June. Ustic Aridic soil moisture regime. <br />Soil temperature: SO to 59 degrees F <br />A horizon -Hue: SYR through lOYR. Value: 4 through 6 dry, 3 through 5 moist. Chroma: 3 or 4. <br />Texture: sandy loam, fine sandy loam, or loam with 10 to 65 percent rock fragments. Reaction is neutral <br />through moderately alkaline. <br />Bt horizon -Hue: l OYR through SYR. Value: 4 through 6 dry, 3 through 5 moist. Chroma: 3 through 6. <br />Texture: loam, sandy clay loam, or clay loam with 30 to 80 percent rock fragments. Averages greater <br />than 35 percent rock fragments in the control section. Reaction is neutral through moderately alkaline. <br />Accumulations of calcium carbonate are in the lower subhorizons of some pedons. <br />Bk horizon -Hue: SYR through 14YR. Value: 5 through 8 dry, 3 through ?moist. Chroma: 2 through 6. <br />Texture: coarse sandy loam, sandy loam, fine sandy loam, loam, sandy clay loam, or clay loam with 15 <br />to 70 percent rock fragments. Some pedons have thin strata of very cobbly loamy fine sand. The Bk <br />horizons are strongly cemented in some pedons. Calcium carbonate equivalent: averages 15 to 30 <br />percent below 23 inches. Reaction: mildly through strongly alkaline. <br />COMPETING SERIES: These are the Larim(W~, Musofare(NM), Romber~(MT), and Tacan(UT) <br />series. Larim, Romberg and Tacan soils lack calcic horizons. Musofare soils have a paralithic contact <br />between depths of 20 to 40 inches. <br />GEOGRAPHIC SETTING: The Sedillo soils are on gravelly bajadas, fan terraces, stream terraces and <br />piedmont slopes at elevations ranging from 5,100 to 7,500 feet. Slopes are dominantly 3 to 20 percent <br />and range from 0 to 60 percent. The soils formed in gravelly moderately fine to moderately coarse <br />textured calcareous alluvium derived from mixed rocks. The climate is semiarid continental. The <br />average annual precipitation typically ranges from 10 to 12 inches, but ranges to 14 inches in some areas <br />with over one-half of the total falling in June through September. In Utah the precipitation ranges fror: 8 <br />to 16 inches. The average annual temperature ranges from 48 to 57 degrees F. The frost-free period is <br />110 to 180 days. In Utah the frost-free period drops to 100 days. In Arizona, elevations range as low as <br />4800 feet. <br />GEOGRAPHICALLY ASSOCIATED SOILS: These are the Ildefonso, Millett, Salas, Tesaio, and <br />Tres Hermanos soils. Ildefonso and Tesajo soils lack argil]ic horizons. Millett soils have l5 to 35 <br />percent gravel in the upper portion of the control section. Salas and Tesajo soils have mollic epipedons. <br />Tres Hermanos soils have 15 to 35 percent gravel in the control section and have annual soil <br />temperatures of 59 degrees F. or more. <br />DRAINAGE AND PERMEABILITY: Well drained; medium to rapid runoff; moderately slow <br />permeability. <br />http://ortho.ftw.nres.usda.gov/cgi-bin/osd/osdname.cgi?-P 1/27/2006 <br />