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24 Soil Survey <br /> The upper 8 inches of the subsoil is brown gravelly rock. No single profile is typical of Fluvaquents, but one <br /> sandy clay loam, and the lower 3 inches is brown commonly observed in the survey area has a surface <br /> gravelly sandy loam.The substratum to a depth of 60 layer of light brownish gray loam about 2 to 12 inches <br /> inches or more is reddish yellow gravelly sand. thick. The underlying material is stratified and ranges <br /> Permeability of the Eckley soil is moderate. Available from gravelly sand to clay loam. <br /> water capacity is low. Effective rooting depth is 60 Included in this unit is about 10 percent Riverwash. <br /> inches or more. Runoff is medium to rapid, and the Permeability is variable. Available water capacity is <br /> hazard of water erosion is moderate. The hazard of soil high in areas where the underlying material is loam and <br /> blowing is moderate. is low where the underlying material is sand. Effective <br /> The Orsa soil is deep and somewhat excessively rooting depth is 20 to 60 inches or more. Runoff is slow, <br /> drained. It formed in sandy alluvium derived dominantly and the hazard of water erosion is slight. The hazard of <br /> from sandstone. Slope is 5 to 15 percent.Typically, the soil blowing is moderate. A seasonal high water table is <br /> surface layer is grayish brown and brown gravelly sandy at a depth of 18 to 60 inches in spring and summer. <br /> loam 10 inches thick.The upper 8 inches of the These soils are subject to frequent brief periods of <br /> underlying material is brown gravelly coarse sandy loam, flooding in spring and summer. <br /> and the lower part to a depth of 60 inches or more is This unit is used mainly for grazing. It is also used for <br /> light brown gravelly coarse sand. irrigated crops. <br /> Permeability of the Orsa soil is rapid. Available water If this unit is used for irrigated crops, the main <br /> capacity is low. Effective rooting depth is 60 inches or limitations are droughtiness and low fertility. Because the <br /> more. Runoff is slow to medium, and the hazard of water soil in this unit is droughty, applications of irrigation water <br /> erosion is moderate. The hazard of soil blowing is should be light and frequent. Returning all crop residue <br /> moderate. to the soil and using a cropping system that includes <br /> This unit is used as rangeland and for noninigated grasses, legumes, or grass-legume mixtures help to <br /> crops. improve or maintain fertility and filth. Sprinkler irrigation is <br /> This unit is poorly suited to nonirrigated crops. It is suited to this unit. <br /> limited mainly by the low available water capacity and The potential plant community on this unit is mainly <br /> the hazard of soil blowing. switchgrass, indiangrass, big bluestem, prairie sandreed, <br /> The potential plant community on this unit is mainly and western wheatgrass. <br /> blue grama, little bluestem, sideoats grama, and If this unit is used for hay and pasture, the main <br /> needleandthread. limitations are droughtiness, the hazard of flooding, and <br /> The suitability of this unit for rangeland seeding is fair. plant competition. Alfalfa can be added to the seed <br /> The main limitations are the low available water capacity, mixture for Irrigated pasture. Alfalfa can be grown alone <br /> the hazard of soil blowing, and steepness of slope. for hay, but it must be seeded with a companion crop to <br /> This unit is poorly suited to windbreaks and control erosion, <br /> environmental plantings. The main limitations are the low This unit is very poorly suited to homesite <br /> available water capacity, the hazard of soil blowing, and development. The main limitations are the hazard of <br /> steepness of slope. Onsite investigation is needed to flooding and the seasonal high water table. <br /> determine the feasibility of planting trees and shrubs. This map unit is in capability subclass VIw, irrigated <br /> If this unit is used for homesite development, the main and nonirrigated. It is in the River Bottom range site. <br /> limitations are steepness of slope and the coarse- <br /> textured underlying material. Erosion is a hazard in the 22—Fluvaquentic Haplaquolls,occasionally <br /> steeper areas. Excavating can expose material that is ponded.These poorly drained soils are on alluvial valley <br /> highly susceptible to soil blowing. Only the part of the floors and in oxbows of the Platte River flood plain.They <br /> site that is used for construction should be disturbed. formed in alluvium derived from various kinds of rock. <br /> Revegetating disturbed areas around construction sites Slope is 0 to 2 percent. Areas are elongated and are 40 <br /> as soon as feasible helps to control soil blowing. Slope to 400 acres. <br /> is a concern in installing septic tank absorption fields. No single profile is typical of Fluvaquentic Haplaquolls, <br /> Absorption lines should be installed on the contour. but one commonly observed in the survey area has a <br /> This map unit is in capability subclass Vie, surface layer of light brownish gray loam 1 inch thick <br /> nonirrigated. It is in the Gravel Breaks range site. over dark grayish brown clay loam about 9 inches thick. <br /> The upper 11 inches of the underlying material is gray, <br /> 21—Fluvaquents, 0 to 2 percent slopes.This map stratified loam, and the lower part to a depth of 60 <br /> unit is on alluvial valley, floors and on the first bottom of inches or more is brown coarse sand. The depth to <br /> the Platte River. Areas are elongated and are 40 to 800 coarse sand ranges from 10 to 24 inches. <br /> acres. Permeability of these soils is variable to a depth of 18 <br /> Fluvaquents are deep and somewhat poorly drained. inches and very rapid below this depth. Available water <br /> They formed in alluvium derived from various kinds of capacity is very low. Runoff is slow, and the hazard of <br />