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SOIL SURVEY Sandy Loam to Clay Loam Soils Forming on Unconsolidated Materials on the Uplands 8. Platner -Rago- Rosebud Deep and moderately deep, nearly level to moderately sloping, well drained soils forming in loamy alluvial and eolian materials on uplands These nearly level to gently sloping soils are on upland tablelands located in the southeastern and north central part of Logan County. Slopes along intermittent drainageways are steeper than the dominant 0 to 3 per- cent slopes occurring in the area. This unit occupies about 23.5 percent of the county, a total of approximately 278,090 acres. About 40 percent of the unit is Platner soils, 30 percent Rago soils, 20 percent Rosebud soils, and the remaining 10 percent soils of minor extent. Platner soils are deep and well drained. They occupy flats and convex ridges and formed in mixed calcareous alluvial and eolian deposits. Rago soils are deep, well drained soils occupying low lying flats and depressions on uplands. They formed in calcareous loamy alluvial and eolian deposits of two ages. Rosebud soils are moderately deep, well drained soils occupying convex ridges and sideslopes. They formed in calcareous loamy alluvial and eolian materials over calcareous sandstone at depths of 20 to 40 inches. This is the most extensive unit in the county. It is also the most important, most productive nonirrigated cropland area The unit is used mainly for nonirrigated cropland with wheat, millet and grain sorghum as the principal crops. A few isolated areas are used for ir- rigated cropland where underground water is available. Some small scattered areas are used for grazing. Soil blowing and water erosion are hazards in the area. Prac- tices that conserve moisture, control runoff, and protect the soil from blowing should be implemented. Stubble mulch tillage and incorporating crop residues are effec- tive in conserving moisture and controlling soil blowing. On sloping areas, terraces are effective in controlling ru- noff and water erosion. Where irrigation water is available, the potential for ir- rigated cropland is good. The potential for urban uses is fair. The high shrink -swell and slow permeability charac- teristic of the Platner and Rago subsoils are limitations. Depth to bedrock should also be considered in the Rosebud soils. In irrigated lands the potential for open- land wildlife habitat is good. In nonirrigated lands the potential for openland and rangeland wildlife habitat is fair. 9. Weld - Platner- Ascalon Deep, nearly level to moderately sloping, well drained soils forming in loamy alluvial and eolian materials on uplands These nearly level to moderately sloping soils are dis- tributed throughout the western and southwestern part of the county. The unit occurs on upland tablelands and ridges and in valleys. This unit occupies about 9.5 percent of the county, a total of approximately 113,760 acres. About 30 percent of the unit is Weld soils, 30 percent Platner soils, 20 percent Ascalon soils, and the remaining 20 percent soils of minor extent. The major soils are deep and well drained. Weld soils occur on upland tablelands. They formed in calcareous, loamy eolian deposits. Platner soils occur on upland table- lands and hills. They formed in calcareous alluvial and eolian deposits. Ascalon soils occur on upland ridges and flats and in valleys. They formed in calcareous loamy eolian and alluvial deposits. Weld and Platner soils have loam surface layers. Ascalon soils have sandy loam sur- face layers. Minor soils are the Manter, Cushman and Rago soils. Manter soils occupy moderately sloping ridges. Cushman soils are moderately deep, occurring on ridges underlain by shale at 20 to 40 inches. The deep Rago soils are in depressions and along drainageways. All are well drained. This unit is used mainly for nonirrigated cropland and grazing. Some small areas are used for irrigated cropland. Wheat and millet are grown in nonirrigated areas. Alfalfa, corn and sugar beets are the main irrigated crops. Soil blowing and water erosion are the main management con- cerns. The scarcity of water limits the potential for irrigated cropland. The unit has a good potential for urban uses, although the Weld soils may be limited by high shrink - swell and slowly permeable subsoils. The potential for the development of openland and rangeland wildlife habitat in nonirrigated and irrigated sections is poor to good. 10. Norka- Ulysses -Colby Deep, gently sloping to strongly sloping, well drained soils forming in calcareous loamy eolian materials on uplands These gently sloping to strongly sloping soils are located in the southern part of the county. The high rounded elongated ridges extending in a northwest direction are divided by narrow elongated drainageways. This unit occupies about 2 percent of the county, a total of approximately 23,360 acres. About 40 percent of the unit is Norka soils, 30 percent Ulysses soils, 20 percent Colby soils, and the remaining 10 percent soils of minor extent. The major Norka, Ulysses and Colby soils are deep, well drained soils with loam surface layers. They formed in calcareous loamy eolian deposits. Norka and Ulysses soils are on mid slopes and foot slopes of ridges. Colby soils occur on ridge crests. They are usually eroded. The minor soils are the Kuma and Albinas soils in the nearly level drainageways and Keith soils on the nearly level to gently sloping upland flats. These soils are deep, well drained loamy soils.