BZA 2002 - Laserfiche WebLink

Home Browse Search

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