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J4 • Soil 12-B. Sandy loam, 0 to 3 percent slope. A deep, somewhat ~~oorly drained soil with a light textured surface soil and a moderately light textured, poorly developed subso9l. 4Jater intake is moderately rapid (2 to 6 inches per hour). Water holding capacity is moderately glow. Soil 12-B belongs to capability class III e8. Class III soil~c have severe limitations that reduces choice of plants, require careful manage- ment, or both. The letter "e" indicates that the severe limitation is attributed primarily to erosion hazards. Capability unit III a-I. is des- cribed as follows.2 "...deep, well drained soils with sandy loam surface layers ar~d subsoils or underlying layers of sandy loam, sandy clay loam or clay. Slopes 'are 0 to 3 percent. Precipitation is 12 to 18 inches and the frost-free season is 140 to 155 days. The soils are rapidly to slowly permeable, runoff is slow to medium and erosion hazard is moderate to severe. Available water holding capacity for the profile is 5 to 11 inches. Effective rooting depth is 6 inches or more." "The land is used mainly for dry cropland, although a few areas (including the Jenkins tract - G.L.H.) are pasture. Wheat is the main crop." "This land is suited to all dryland uses and all adapted craps and grasses. A summer fallow system of farming is necessary for good yields... crested wheat, pubescent wheat, intermediate wheat and Russian tiild rye are good grasses." Soil .16-A. McClave clay loam, level, A deep, somewhat poorly dr~3ined soil with a moderately heavy to medium textured surface soil. The sub- soil is moderately heavy textured, and poorly developed. Water intake . rate is moderately slow (0.2 to 0.6 inches per hour). 4later holding capacity is high. Irrigation management is important. Capability Unit II sw 1 when irrigated. Capability Unit II say is described as follows: U.S. Soil Conservation Service.. Unpublished manuscript at Longmont, Colorado office.