Wetland classification, Identification and Delineation report-2004

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RANGE IN CI-EARACTERISTICS: Depth to free carbonates range from 30 to 65 _ inches. The mollic ep�peclon thickness ranges from 24 to 60 inches. Typically the upper colluvim contains less than 2 percent gravel by volume and the lower part contains 2 to 6 percent grave! by volume of mixed lithology. The A horizons have hue of IOYR or is neutral, value of 2 or 3, and chroma of Q to 2. � Typically it is loam or clay loam, but silt loam or silty clay loam are within the range. It , has coatings of clean sand and silt particles in the lower part of the A horizon in some pedons. It is moderately acid to neutraL The Btg horizon has hue of lOYR,2.SY, or SY, value of 2 to 4, and chroma of 1 or 2. It is ctay loam, silty clay loam high in sand, or loam. It has between 25 and 35 percent clay and 15 to 35 percent fine sand and coarser. It has B/A clay ratios of I.2 to I.4. It has few to many, faint to prominent clay films. It is moderately acid to neutral. The C horizon has ttue of a 2.SY or SY, value of 4 to 6,chroma of 1 or 2. It is ]oam or clay loam.It is slightly alkaline or moderately alkaline. The clay content ranges fcom 18 to 32 percent and the total sand content ranges from 25 to 4S percent. � COMPETING SERIES: These are the Alvada, Barrv, Berville, Brookston, Buntin�ville, Clackamas, Cordova, Forestcitv, Jameston, Maren�o,Millgrove, Navan, Nosoni, Rensselaer, and Westiand soils. The Alvada series (Tentative- OH} is not in the OSD file at this time. The Barry, Berville,Brookston, Cordova, Marengo, Millgrove, � Navan,Rensselaer, and Westland soils have a mollic epipedon that is less than 24 inches � ; thick.The Buntingville soils have carbonates at depths of less than 20 inches. The Clackamas and Nosoni soils lack free carbonates in the series control section. The Forestcity soils have 45 to 65 percent sand and 10 to 18 percent clay in the underlying materiai.The Jamestown soils formed in a firm and very firm till associated with the Iowan Erosional surface. � GEOGRAPHIC SETTING: Hamel soils nave concave slopes in swales, rims of ciosed ' depressions, foot and toe slopes, and upper drainageways•below sloping to very steep slopes. Slope gradients are 1 to 4 percent. Hamel soils formed in slope colluvium and glacial tilI of Late Wisconsinan Aga. Mean annual air temperature is about 45 to 48 '� degrees F. Mean annual precipitation is about 25 to 30 ini;hes. Frost free days range from 125 to 165. Elevation above sea Ievel ranges from 704 to 1600 feet. ' GEOGRAP�-IICALLY ASSOCIATED SOILS: These.are principally the Ha den and Lester soils.These soils are well drained and are on the higher lying, gently sloping to very steep slopes. DRAINAGE AND PERMEABILITY: Poorly drained and somewhat poorly drained. Surface runoff is low or moderately low. Permeability is:moderately slow. The apparent seasonal high water tabie is at .S to 1.5 feet for the poorly drained phase and 1.5 to 2.5 � feet for the somewhat poorly drained phase during spring in�normal years. USE AND VEGETATION: Most of this sozl is cropped to corn, hay, soybeans, and smaIl grains. However, significant areas are in pasture and forest. Native vegetation is mixed wet prairie grasses and deciduous forest.