2002-06-18_PERMIT FILE - M2002062

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Official Series Description - NUMA Series Page 2 of 2 40 inches has hue of 7.SYR or yellower. The control section is typically loam or clay loam but clay ranges from 18 to 35 percent, silt from 5 to 50 percent, and sand from 20 to 70 percent. Man-made Ap horizons 10 to 20 inches thick that are medium to moderately fine textured that border mollic epipedons in color, and border anthropic epipedons in nitrogen and phosphorus, characterize these soils. These are the result of long periods of inigation with silt laden irrigation water accompanied by intense cropping, heavy fertilization, and larger than normal yearly returns of organic matter. The A horizon has hue of 2.SY through 7.5YR, value of 5 through 7 dry, 3 through 6 moist, and chroma of I through 4. It is moderately or strongly alkaline (1:5 dilution unbuffered organic dye). The Cca horizon has hue of 2.5Y through 7.SYR. Calcium carbonate equivalent of the fine earth ranges from 15 to 40 percent. COMPETING SERIES: These are the _Atrra, Bpyti~dish, Cibcque Hary~cy, and Pultney_ series. Abra and Harvey soils lack aman-made enriched Ap horizon. Bowdish and Pultney soils have a paralithic contact at depths of less than 40 inches. Cibeque soils have more than 15 percent rock fragments in the control section and lack man-made Ap horizons. GEOGRAPHIC SETTING: The Numa soils are on nearly level to gently sloping terraces, flood plains, and alluvial fans. Slopes typically range from about 0 to 6 percent or more. The soil formed in thick medium to moderately fine textured alluvium or pedisediments of mixed origin. At the type location the mean annual precipitation is about 15 inches with peak periods of precipitation in the spring and early summer months. Mean annual temperature is 52 degrees F., and mean summer temperature is 79 degrees F. GEOGRAPHICALLY ASSOCIATED SOILS: These are the Harvev and Neesoaah soils. Harvey soils lack the man-made enriched Ap horizons that characterize the Numa series. Neesopah soils have an argillic horizon, are moderately coarse textured, and lack a calcic horizon. DRAINAGE AND PERMEABILITY: Well drained; slow to very slow runoff; moderate to slow permeability. USE AND VEGETATION: Used as irrigated cropland. Principal irrigated crops are alfalfa, small grain, corn, sorghum, truck crops, and melons. DISTRIBUTION AND EXTENT: The Arkansas Valley, Colorado. The series is of small extent. MLRA OFFICE RESPONSIBLE: Salina, Kansas SERIES ESTABLISHED: Prowers County, Colorado, 1963. REMARKS: Last updated by the state 4/73. National Cooperative Soil Survey U.S.A. http://wwwstatlab.iastate.edu/cgi-bin/osdlosdname.cgi?-P 3/15/2002