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<br /> 60
<br /> SOIL SURVEY
<br /> thansElburn, Orion,nVirR 1, and Ha field soilsoThey drained
<br /> a
<br /> thicker solum and finer texture than Wacousta soils. They bro
<br /> •• .nd and : ave tun
<br /> �! /� C horizon of M a :•: • •, bro
<br /> -41S-.2- (/'k(/, Sable silty clay loam, 0 to 3 B22t-25 srto
<br /> I percent slopes (SaA).—
<br /> y This soil is on low benches in stream valleys. Areas of sta•
<br /> this soil are irregularly shaped tracts 80 to 440 acres dun
<br /> 2a"-(34- �`/Y in size. Water ponds in concave areas.
<br /> Included with this soil in mapping are areas of soils B31--33 eta
<br /> it ''' that have a mucky surface layer, areas of soils that are loa
<br /> 26 to 36 inches thick over massive silt, and areas of h;
<br /> soils 40 to 60 inches thick over loose sand. Also in-
<br /> cluded are small areas of Elburn, Virgil, and Wacousta on
<br /> soils, sm
<br /> If this soil is IIB32-41 t.
<br /> crops, small grain, andrelo clover hay.If not sd alined, it is coat
<br /> muc
<br /> better suited to wildlife habitat and limited acid 6(
<br /> Poor surface and internal drainage must be overcome IIC-5o fr g
<br /> if row crops are to be grown. A high level of manage- may.
<br /> ment includes artificial drainage, frag
<br /> g , maintenance of the ky s
<br /> tilth of the surface layer, and maintenance of the level Ap
<br /> of fertility. The silty s.
<br /> of it Y Capability unit IIw-1; woodland suita- (1O The 3/2)
<br /> y group 4w5. (r yis 3/2)
<br /> grayish-brown
<br /> gray (10YR
<br /> St. Charles Series from heavy s
<br /> part of the B
<br /> sandy loam to
<br /> The St. Charles series consists of deep, nearly level in thickness.
<br /> to moderately steep, well drained and moderately well
<br /> lower part of
<br /> careous sandy
<br /> drained soils on glaciated uplands. These soils formed calcium carbor
<br /> in deep loess and loamy inches, but in
<br /> woods. Y glacial till under mixed hard- 32 percent.
<br /> In a representative profile the surface layer is dark
<br /> St. Charles s
<br /> and Virgil soil;
<br /> grayish-brown silt loam about 6 inches thick. It dries formed in loes
<br /> to a distinctive horizon than P
<br /> gray color. The subsurface layer is Charles soils lz
<br /> brown, friable silt loam about 3 inches thick. The sub- soils have. The,
<br /> soil is about 41 inches thick. The upper 32 inches is
<br /> firm, yellowish-brown silt loam and silty clay loam; and St. Charles silt
<br /> is on r
<br /> r
<br /> the lower 9 inches is friable, brown loam. The under- This This soil it a
<br /> lying material is massive, calcareous, brown sandy of this soil are
<br /> loam till. Y acres in size. Slo
<br /> These soils have high fertility. The available water This soil has
<br /> capacity is high, and permeability is moderate. The thicker.repreIn culti e
<br /> seasonal high water table is below a depth of 3 feet, uniformly very
<br /> In eiy
<br /> and it usually is below a depth of 5 feet. unifoe
<br /> These soils are suited to all crops commonly grown areas it is darke
<br /> in the county. The main crops are corn, oats, and al- Included with
<br /> areas of falfa. These soils are also suited to pasture, woodland small soil o
<br /> and wildlife habitat. If these soils are cultivated, con- sm`v l a e s areas o
<br /> trolling erosion and maintaining tilth and organic- mall areas of soi
<br /> inches
<br /> matter content are helpful conservation practices. s thick.
<br /> Representative profile of St. Charles silt loam, 2 to This soil is well
<br /> 6 percent slopes, in cultivated area, 500 feet north of in the county. It c,
<br /> bend in field lane, NE1%NE1/1 sec. 15, T. 5 N., R. it gr maintained.1 Cap
<br /> 10 E.:
<br /> Ap-0 to 6 inches, dark grayish-brown 10YR 4/2) silt St. Charles silt 1
<br /> loam; moderate, very ( This soil is on ride
<br /> Y fine, granular structure; of this soil are elon
<br /> friable; common roots; neutral; abrupt, smooth Slope segments are
<br /> boundary.
<br /> A2-6 to 9 inches, brown (10YR 5/3) silt loam; moderate,
<br /> thin, platy structure; This soil has the
<br /> neutral; abrupt, smooth boundary,common roots; of the series. In c
<br /> B1-9 to 15 inches, yellowish-brown (10YR 5/4) heavy almost uniformly d
<br /> silt loam; weak, very fine, subangular blocky it is very dark gra
<br /> structure; firm; common roots; Included with th
<br /> clear, smooth boundary. slightly acid;
<br /> B21t-15 to 25 inches, yellowish-brown (10YR 5/4) silty have Dodge
<br /> a silt mantle ;
<br /> i
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