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<br />Management practices suitable for use on this unit are proper range use, deferred grazing, rotation grazing, and brush <br />management. Grazing should be delayed until the soil is firm and the more desirable forage plants have achieved suffi- <br />• cient growth to withstand grazing pressure. <br />Range seeding is also suitable if the range is in poor condition. For successful seeding, prepare a seedbed and drill in <br />the seed. The plants selected for seeding should meet the seasonal requirements of livestock or wildlife, or both. <br />This map unit is in capability subclasses Ille, irrigated, and Illc, nonirrigated. It is in Salt Meadow range site. <br />The soil listed below is located in the wetland immediately north of the site. <br />71-Redrob loam. This deep, somewhat poorly drained soil is on alluvial valley floors, low terraces, and flood plains. It <br />formed in mixed alluvium. Slope is 0 to 3 percent. Areas are elongated and are 20 to 80 acres. The native vegetation is <br />mainly cottonwood trees with an understory of shrubs and grasses. Elevation is 5,800 to 7,200 feet. The average annual <br />precipitation is 15 to 18 inches, the average annual, air temperature is 39 to 42 degrees F, and the average frost•free <br />period is 85 to 105 days. <br />Typically, [he upper part of the surface layer is grayish brown light loam about 4 inches thick. The lower part is grayish <br />brown loam about 13 inches thick. The next layer is grayish brown, stratified loam, sandy loam, and loamy sand 18 <br />inches thick. The underlying material to a depth of 60 inches or more is brown very gravelly and cobbly loamy sand and <br />sand. <br />included in this unit are small areas of Fluvaquents, frequently flooded; Curecanti very cobbly loam; Kobar silty clay <br />loam; Redrob Variant loam; Shawa loam; and Shawa loam, wet. Included areas make up about 15 percent of the total <br />acreage. The percentage varies from one area to another. <br />Permeability of this Redrob soil is moderate. Available water capacity is moderate. Effective rooting depth is 60 inches or <br />more for water-tolerant plants, but it is limited to depths between 20 and 40 inches for non-watertolerant plants. Runoff is <br />medium, and the hazard of water erosion is slight. A high water table is at a depth of 18 to 48 inches yearround. This soil <br />is subject to brief periods of flooding in May to July. Ice jams also cause flooding during prolonged cold periods in winter. <br />This unit is used for irrigated hay and pasture and for wildlife habitat. <br />This unit is well suited to irrigated hay and pasture. The main limitations are the restricted rooting depth for <br />non-watertolerant plants and a short growing season. Wetness limits the choice of plants and the period of cutting or <br />grazing and increases the risk of winterkill. Use of nitrogen and phosphorus fertilizer promotes good growth of forage <br />plants. Furrow, border, corrugation, and sprinkler irrigation systems are suited to the unit. Leveling helps to insure the <br />uniform application of water. <br />This unit provides food and cover for waterfowl and wetland wildlife. <br />• <br />Piceance Pi[ ?101 9 <br />