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1 3?I X5.6 A13 <br /> 3 - AgolIs and Ar1e-ts,_1ravelly suhstrat. nm <br /> <br /> <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 mapping 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 /> <br /> These are deep, poorly drained soils. They formed in recent alluvium. <br />t <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. They may or may not have a <br /> <br /> gleyed layer in the underlying material. <br /> <br />( A watertable is at or <br />odin <br />fl <br />b <br />il <br /> g, <br />o <br />s are su <br />ject to <br />Most of these so <br />t near the surface early in the spring and recedes to as deep as 48 <br /> inches by late fall in some years. <br />' <br /> 'these soils are used for rangeland and wildlife habitat. Some small <br />t areas have been reclaimed by major drainage and leveling operations <br /> and is farmed to irrigated crops. <br /> <br /> The potential native vegetation on these soils is dominated by alkali <br /> sacaton,'switchgrass and western whestgrass. Snltgrass, 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. When range condition deteriorates, switchgrass, <br /> <br /> <br />