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• fragments and are effervescent in the argillic horizon. <br />GEOGRAPHIC SETTING: Monierco soils are on plateaus, knolls and ridges. Slopes range from 0 to 8 percent, <br />Elevations range from 4800 to 6400 feet. The mean annual precipitation is 6 to 110 inches. The mean annual <br />temperature is 48 to 55 degrees F. The average frost-free period is 120 to 160 days. In Arizona the temperature <br />is as high as 57 degrees F.; frost free days as long as 180 days; precipitation as <br />much as 12 inches; and slopes to 15 percent. <br />GEOGRAPHICALLY ASSOCIATED SOILS: These are the Mayqueen, Sheppard and Shiprock soils. Mayqueen <br />and Shiprock soil have less than 18 percent Gay in the particle-size control section and are deep. Sheppard soils <br />are sandy and deep. <br />DRAINAGE AND PERMEABILITY: Well drained; medium runoff and moderately slow permeaility. <br />USE AND VEGETATION: These soils are used for livestock grazing. Native vegetation is galleta, Mormon tea, <br />blue grams, Indian ricegrass, big sagebrush, broom snakeweed and winterfat. <br />• DISTRIBUTION AND EXTENT: The Monierco soils are of small <br />extent in northwestern New Mexico and nodheastem Arizona. <br />MLRA OFFICE RESPONSIBLE: Phoenix, Arizona <br />SERIES ESTABLISHED: San Juan County, New Mexico Eastern Park, 1977. <br />REMARKS: Diagnostic horizon and features recpgnized in this pedon are: <br />Ochric Epipedon: the zone from the surface to a depth of 3 inches. <br />Argillic horizon: the zone from 5 to 10 inches. (Bt horizon) <br />National Cooperative Soil Survey <br />U.S.A. <br />• <br />(Revised March 2006) Attachment 2.04.9-3-25 <br />