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3~ aBCi- fFl3 • • <br />y,,,,~ 3 -Aquolls and Agc~ts, Rravell~ substratum <br />These nearly level soils are on bottom lands and flood plains of all <br />the major streams in the survey area. The Aquolls, which have dark <br />colored surface layers, make up about 65 percent of the mappirg unit. <br />The Aquents, which have lighter colored surface layers, make up about <br />25 percent. About 10 percent is Aquolls and Aquepts, flooded, and <br />Bankard sandy loam. <br />These are deep, poorly drained soils. They formed in recent alluvium. <br />Typically they have mottled, mildly to moderately alkaline, loamy or <br />~ clayey surface layers and underlying material, and are underlain by. <br />sand or sand and gravel within 48 inches <br /> <br />~\ <br />Piost of these soils are subject to flooding <br />gleyed layer in the underlying material. <br />They may or may not have a <br />A watertable is ,3t or <br />near the surface early in the spring and recedes to as deep as 48 <br />inches by late fall in some years. <br />These soils are used for rangeland and wildlife Habitat. Some small <br />areas have been reclaimed by major drainage and leveling operations <br />and is farmed to irrigated crops. <br />The potential native vegetation on these soils is dominated by alkali <br />sacaton,'switchgrass and western wheatgrass. Saltgrass, sedge, rush <br />and alkali bluegrass are also prominent. Potential production ranges <br />from 3000, pounds per acre in favorable years to 2000 pounds per acre <br />in unfavorable years. k'hen range condition deteriorates, switchgrass, <br />