FEBRUARY 14, 2002 - Laserfiche WebLink

Home Browse Search

So~ sur~ey This soil is well suited to trees. The hazards and limitations are generally slight. Plant competition, however, is moderate. Co[npeting vegetation can be controlled by spraying, cuffing, or girdling. This soil has severe limitations for use as building sites because of wetness. Drainage is needed to reduce wetn6ss. This soil has severe limitations for septic tank absorption fields because of wethess and slow parmeabllity. Enlarging the filter field and lowering the water table may help the soil function better as an absorption field. This soil has severe limitations for local roads and streets because of frost action and Iow strength. Drainage ditches along reads help reduce frost action. The road base should be strengthened with suitable material. This soil is in capability subclass llw and in woodland suitability subclass 30. CsB2--Crosby-Mlarnl slit loams, 2 lo 4 percent slopes, eroded. These are gently sloping, deep, somewhat poorly drained and well drained soils. About 60 percent of the unit is Crosby soil, and about 30 percent is Miami soil. The Crosby soil is in the lower, txoeder, less sloping areas. The Miami soil is in the higher, more sloping areas. Areas of these soils are so intricately mixed or so small in size that it was not practical to map them separately. The areas are Irregular in shape and range fram 5 to 50 acres in size. Typically, the sudace layer of the Cresby soil is dark grayish brown silt loam about 8 inches thick. The subsoil is about 20 inches thick. In the upper part it is dark grayish brown, friable silty clay loam; in the middle part it is brawn, mottled, tirm clay loam; and in the lower part it is grayish brown, mottled, tirm clay loam. The substratum to a depth of about 60 inches is yellowish brown, mottled loam. In some places the soil is grayer, and in some places the silt cap is thicker. Also, in a few places the combined surface layer and subsoil are thicker than 40 inches, and the lower part of the subsoil and substratum have more sand. Typically, the surface layer of the Miami soil is mixed with the subsoil. It is brown slit loam and dark yellowish brown clay loam about 7 inches thick. The subsoil is about 30 inches thick. In the upper part it is dark yellowish brown, firm clay loam; in the middle part it is yellowish brown, firm clay loam, and in the lower part it is dark brown, firm clay loam. The substratum to a depth of about 60 inches is pale brown loam. In some places the lower part of the subsoil is mottled, or the combined surface layer and subsoil are thicker then 40 inches. Included with these soils in mapping are small areas of Brookston soils in depressions and narrow drainagaways. Also included are small areas where the surface of the Crosby and Miami soils is clay loam. The included soils make up about 10 percent of the map unit. The available water capacity of both the Crosby and · Miami soils'is high. Permeability o! the Crosby soil is slow. Permeability of the Miami soil is moderate in the subsoil and moderately slow in the substratum. The content of organic matter is moderately Iow in both soils. Surface runoff is medium. The Crosby soil has a water table at a depth of 1 to 3 feet in winter and early in spring. The surtace layer of both soils is friable and is easily worked within a fairly wide range of moisture content. It does, however, have a tendency to crest or puddle after hard rains, especially in areas where the surface layer is mixed with the subsoil. Root development is restricted below a depth et about 32 inches by compacted glacial till. In most areas these soils are used for cultivated crops. In a few small areas they are used for hey.or pasture or as woodland. The soils in this map unit are suited to corn, soybeans, and wheal Erosion is the major hazard. In addition, wetness is a limitation for the Crosby soil. Tile out, et terraces, grassed waterways, or diversions are needed to control surtaca mneff and erosion. Drainage is needed in the Crosby soil. Consarvation tillage that leaves crop residue on the surface, crop rotation, green manure crops or other organic material added to the soil help improve the content el organic matter, soil tilth, and water infiltration, and thus reduce crusting and erosion. These soils are well suited to grasses and legumes for hay or pasture. Grasses and legumes effectively control erosion. They should be selected on the basis of the extent of drainage. Overgrazing or grazing when the soil is wet causes compaction and poor tilth and reduces plant density and hardiness. Proper stocking rates, pasture rotation, timely grazing, and weed control help keep the pasture and in good condition. These soils are well suited to trees. The hazards and limitations are generally slight. Plant competition, however, is moderate. Competing vegetation can be controlled by spraying, cutting, or girdling. Species that are tolerant of wetness should be selected, The Crosby soil has severe limitations for use as building sites because el wetness. Drainage is needed to reduce wetness. Crosby soil has severe limitations for septic tank absorption tields because of wetness and slow permeability. Enlarging the tilter field and lowering the water table may help this soil function better as an absorption field. The Cresby soil has severe limitations for local roads and streets because of frost action and Iow strength. Drainage ditches along roads help reduce trost action. The read base should be strengthened with suitable material. ' The Miami soil has slight limitations Ior use as building sites. It has severe limitations for septic tank absorption fields because of moderately slow permeability. Enlarging the filter tiaid may help the soil function better as an absorption field. Lateral seepage on top of the till occurs in poorly designed systems and may surface downsiope.' The Miami soil has moderate limitations lot local roads and streets because of frost action. Drainage ditches along roads help reduce frost action.