2013-10-18_REVISION - M1982186 - Laserfiche WebLink

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Kit Carson County, Colorado Parent material. Fine -loamy eolian deposits over fine - loamy alluvium Native plant cover type: Rangeland Flooding: None Available water capacity. Mainly 9.7 inches Typical profile: A1--0 to 5 inches; loam A2 -5 to 8 inches; loam Bt-8 to 16 inches; clay loam Bk1 -16 to 21 inches; loam Bk2 -21 to 28 inches; loam C-28 to 60 inches; loam Colby and similar soils Percent of the map unit. 20 percent Landform: Plains Landform element: Summits Slope range: 3 to 5 percent Surface layer texture: Silt loam Depth to restrictive feature: More than 60 inches Drainage class: Well drained Parent material. Fine - silty, calcareous loess Native plant cover type: Rangeland Flooding: None Available water capacity: Mainly 10.6 inches Typical profile: A-0 to 3 inches; silt loam AC-3 to 12 inches; silt loam C1 -12 to 28 inches; silt loam C2 -28 to 60 inches; silt loam Additional components Manter and similar soils: 15 percent Sampson and similar soils: 15 percent Management Major uses: Nonirrigated cropland, irrigated cropland, and rangeland The main limitations affecting nonirrigated and irrigated crops are low precipitation and the hazards of water erosion and soil blowing. The Colby soil is also limited by low organic matter content, low fertility, and lime- induced chlorosis. Because the amount of precipitation is not sufficient for annual cropping, the best cropping system for nonirrigated crops is one that includes small grain and summer fallow. Maintaining crop residue on or near the surface can help to control runoff and soil blowing. Tillage should be minimized and should be on the contour or across the slope. Terraces reduce the runoff rate, help to control erosion, and help to conserve moisture. A high content of lime that causes lime- induced chlorosis decreases the available supply of most plant nutrients. Choorosis is apparent, particularly in beans 79 and grain sorghum. Returning crop residue to the soil or regularly adding other organic material improves fertility, minimizes crusting, reduces the hazards of water erosion and soil blowing, and increases the water intake rate. Controlled livestock management is the major management practice needed on this map unit. The main limitations affecting windbreaks and environmental plantings are low precipitation and the hazard of soil blowing on the Satanta and Colby soils and lime- induced chlorosis on the Colby soil. Planting the trees on the contour helps to conserve moisture. Summer fallow, cultivation for weed control, and selection of adapted plants help to ensure the establishment and survival of seedlings. Shrubs and trees that are not sensitive to lime- induced chlorosis are suitable for use in windbreaks on the Colby soil. 78— Satanta- Sampson, rarely flooded, loams, 0 to 3 percent slopes Setting Location: This map unit occurs throughout the survey area. Elevation: 3,901 to 5,200 feet Mean annual precipitation: 14 to 17 inches Frost -free period. 145 to 152 days Note: This map unit is in nearly level and gently sloping areas on stream terraces and flood plains. The native vegetation is mainly grasses. Component Description Satanta and similar soils Percent of the map unit. 40 percent Landform: Terraces Slope range: 0 to 3 percent Surface layer texture: Loam Depth to restrictive feature: More than 60 inches Drainage class: Well drained Parent material. Fine -loamy eolian deposits over fine - loamy alluvium Native plant cover type: Rangeland Flooding: None Available water capacity: Mainly 10.0 inches Typical profile: Ap-0 to 4 inches; loam AB-4 to 7 inches; clay loam Bt1 -7 to 14 inches; clay loam Bt2 -14 to 19 inches; clay loam Bt3-19 to 23 inches; clay loam Bk -23 to 34 inches; loam C-34 to 60 inches; loam