Wetland classification, identification, delineation-2004

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, �� ; -- j•1 to 38 inches , olive-gray (5Y 5/?) loamy Borrow L�n�l � ;:in�; common, Eine, �fistinct, ycllowish-brown ft�)YR 5/6) mo[tles; weak, coarse, subangular Borrow land (Bo) is a misce11.1neous lanS type I,locky structure; very friable; slightly acid; that consists of sloping lan�l that has been gr,lded cicar, smooth bounJary. to produce a level site Por large buildings. ��reas � -�,9 to 6O inches, light olive-gray (SY h/2) generallv range in si�e Erom ahout 2 to 1� acres. '' :�;�r5e san�l; Pew, finc, �lis[inct, strong-brown ['his mapping unit occur� mainty in rolling to I'.SYR S/F,) mottles; single grain; loose; steep arcas of loamy to clavev ti:1. �iost areas slightly acis. have a water table that rem,lins at a c(epth below 5 feet in all seasons. A few areas are poorly drainecl, Che A1 horizon is Ioam or clay loam 12 to 20 and wet basements can occur on these sites. nches thick. The A3 horizon is loam or clay loam Building construction can usually begin in these to 6 inches thick. Texture of the 82 horizon areas soon after grading without causing settling ges Erom loam to clay loam. Texture of the C problems. These areas are poorly suited to septic i�on ranges from loamy sand to gravelly coarse tank drainfields, as water moves slowly through this and. The solum ranges from 22 to 38 inches in material. (Vot in a capability unit, woodland hickness but is typically 24 to 36 inches thick. group, or building site group) ction ranges from medium acid to neutral. The C i�on is slightly acid to mildly alkaline. Biscay soils are closely associated with Dassel Borrow Pits oils but are finer textured in the upper part of solum. Borrow pits (Bp) is a miscellaneous land type that consists of excavations into hillsides or Biscay clay loam (Bc).--This nearly level soil knolls for the purpose of removing soil for con- ccupies 2-acre to 25-acre tracts in broad, shallow struction uses. The soil is generally loamy or inageways and on flats. It has the profile de- clayey. Most pits are less than 1 acre in size. ibed as reprasentative for the series. (Not in a capability unit, woodland gro or Included in ma in were a few small de ressions �' PP 8 P building site group) hat are ponded during seasons of high rainfall. In ew areas, the soils are mainly calcareous through- the profile. Braham Series Wetness is the major limitation of this soil. It • eeds tile or surface drainage for good crop pro- The Braham series consists of deep, somewhat ex- tion. Because the underlying material is porous, cessively drained soils. These soils formed in an e lines can be spaced widely apart. In addition 18-inch to 40-inch mantle of sandy material and in drainage, proper fertilization and tillage at the the underlying loamy till. They occur on knolls and . ight moisture content are important. hills, mainly along the edges of sandy stream ter- If properly drained, this soil is suited to a11 � races. Slopes range from 2 to 12 percent, include 'or crops grown in the county. Corn and soybeans both simple and complex forms, and are 75 to 200 the main crops, and with good management they feet long. The native vegetation was mixed hard- an be grown year after year. (Capability unit woods. -1; woodland group 6; building site group 9) In a representative profile, the surface layer is very dark grayish-brown loamy fine sand about 12 Biscay clay loam, depr�ssional (Bd) .--This soil inches thick. The subsoil consists of two layers. ccurs in depressions and in narrow drainageways. The upger 12 inches is dark grayish-brown loamy fine depressions are 2 acres to about 20 acres in sand. The lower 22 inches is brown sandy loam that �e and lie 1 to 4 feet below areas of Biscay clay grades to dark yellowish-brown clay loam. The un- am. This soil has a profile similar to that de- derlying material is calcareous, light olive-brown cribed as representative for the series. lo�, Included in mapping were areas of soils that have graham soils have low to moderate available -urface layer of silty clay loam and many areas moisture capacity. Available moisture capacity is at are calcareous. In many areas this Biscay soil highest in areas where the loamy subsoil is at the as a subsoil of silty clay underlain by loose sand shallower depths. Unless rainfall is timely, crop a depth of 20 to 36 inches. growth is limited by drought. Response to irriga- The main management needs are drainage and main- tion is good, but the steepness of slope limits the ance of soil tilth and fertility. In most places use of irrigation equipment in most areas. The dequate tile outlets are lacking. If properly sandy layers are rapidly permeable, but the subsoil aged, this soil is suited to common rarm crops and underlying material are moderately permeable. wn in the county, Most of this soil is in marsh Tl1e root zone is deep. The water table is at a meadow vegetation. (Capability unit IIIw-1; depth below 5 feet in all seasons. Internal drainage oodland group 7; building site group 12) is medium. These soils are easily blown. They are 13 �