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yASHINGTCN AND RAMSEY COUNTIES, MINNESOTA Rosholt sandy loam, 1 to 6 percent slopes. this very gently undulating to undulating soil is well "Ined. It is on sides and crests of tow hills on outwash ;utrns. Individual areas range from 5 to 30 acres and are negular in shape. Typically, the surface layer is dark brown sandy loam recut 11 Inches thick. The subsoil is about 20 inches Mk. The upper part is brown sandy loam. The middle part is reddish brown sandy loam. The lower part is eddish brown gravelly loamy coarse sand. The underly- ng material is yellowish red gravelly sand. In some *aces the underlying material lacks coarse fragments. the loamy mantle is less than 20 inches thick in places. n some small areas slope is more than 6 percent. In the Louth and central parts of the survey area the surface Isyer is thicker and darker colored. Included with this soil in mapping are small areas of Amigo. Barronett sandy substratum, Brill, and Poskin lots. The Antigo soils are well drained and have silt cam surface and subsurface layers over sand and ;ravel. The Barronett sandy substratum soils are poorly *tined and occupy depressions, The Brill soils are mod- erately well drained and are in shallow depressions. They have a silt loam surface layer and subsoil over find and gravel. The Poskin soils are somewhat poorly *coned and occur in depressions. Permeability of the Rosholt soil is moderately rapid in the surface layer and subsoil and is very rapid in the wderiving material. Surface runoff is medium. The avail- tW( ter capacity is low. Natural fertility is medium, wW „d organic matter content is low. Most areas of this soil are farmed. It has fair potential W crops, pasture, and woodland. It has poor potential br mast sanitary facilities and good potential as building ores. ,his soil has fair suitability for all crops commonly yyown in the survey area. The main limitation is the low wadable water capacity. Early -maturing crops are well adapted to this soil because they take advantage of eutyseason moisture. Minimum tillage and returnof crop residue to the soil help maintain tilth, increase water wadable for plants, and increase fertility. Crops grown on this soil respond well to irrigation. This soil has only fair suitability for permanent pasture Or hay because yields are limited by the low available "ter capacity. It provides good pasture in spring and fall and fair to poor pasture in summer. Proper stocking, posture rotation, weed control, and timely deferment of Qaang help to keep pasture and soil in good condition. Pannng pasture and hay may be desirable to improve plant species and potential yield. 71ns soil has fair suitability for trees. Seedling mortality t to moderate. Competing vegetation can be con - by spraying or girdling or by mechanical means %Xh as plowing, disking, or bulldozing. There is no re- *Icton to time of year or type of equipment that can be Iaeo. �'s soil is well suited to building site development. I od is moderately susceptible to frost heaving. 53 Roads, streets, and sidewalks are subject to damage unless carefully designed. Sidewalis in the underlying material have poor stability and may cave in during exca- vatlon. This can be prevented with temporary retaining walls. Septic tank absorption fields function well in this soil, but there is a hazard of contamination of underground water supplies unless special systems are installed. It is generally easy to establish lawns, trees, and shrubs on this soil. Additions of water and fertilizer are needed to keep them growing vigorously. This soil is a fair source of sand and gravel for construction. This soil is in capability subclass Its and woodland suitability group 20. 302C—Rosholt sandy loam, 6 to 16 percent slopes. This gently rolling to hilly soil is well drained. It is on sides and crests of hills on pitted outwash plains. Individ- ual areas range from 5 to 40 acres and are irregular in shape. Typically, the surface layer is very dark gray sandy loam about 5 Inches thick. The subsoil is about 29 Inches thick. The upper part is dark brown and very dark grayish brown sandy loam. The lower part is brown loamy sand. The underlying material is brown gravelly sand. In some places the loamy layers are less than 20 inches thick. In some farmed areas the surface layer is eroded and may be lacking. The underlying material lacks coarse fragments in places. In some areas slope is less than 6 percent or more than 15 percent. In the south and central parts of the survey area the surface layer is thicker and darker colored. Included with this soil in mapping are small areas of Antigo, Barronett sandy substratum, Brill, and Poskin soils. The Amiga soils are well drained and formed in a silty mantle over sand and gravel. The Barronett sandy substratum soils are poorly drained and occupy depres- sions. The Brill soils, which occur in shallow depressions, are moderately well drained and have a silty surface layer and subsoil. The Poskin soils are somewhat poorly drained and occur in depressions and drainageways. Permeability of the Rosholt soil is moderately rapid in the surface layer and subsoil and very rapid in the under- lying material. Surface runoff is medium to rapid. The available water capacity is low. Natural fertility is medium, and organic matter content is low. Most areas of this soil are farmed or are in woodland. This soil has fair potential for small grains and grass and legume hay and pasture. It has poor potential for corn and soybeans. It has fair potential for woodland. This soil has poor potential for most sanitary facilities and good potential for building site development. This soil has fair to poor suitability for craps. Droughti- ness and the hazard of erosion are the main limitations. It is best suited to early -maturing crops, such as small grains, which take advantage of early -season moisture. Minimum tillage or a crop rotation that contains forage craps helps to control erosion. Erosion control by con-