LOCATION RASSET MN+WIEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, mesic Typic Argiudolls
TYPICAL PEDON: Rasset sandy loam, on a 3 percent slope, in a cultivated field. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 25 centimeters; very dark brown (10YR 2/2) sandy loam, dark grayish brown (10YR 4/2) dry; weak fine and medium subangular blocky structure; very friable; slightly acid; abrupt smooth boundary. (17 to 31 centimeters thick)
A--25 to 38 centimeters; very dark brown (10YR 2/2) sandy loam, dark grayish brown (10YR 4/2) dry; weak medium and coarse subangular blocky structure; friable; moderately acid; clear wavy boundary. (0 to 20 centimeters thick)
Bt1--38 to 53 centimeters; dark grayish brown (10YR 4/2) sandy loam; weak medium subangular blocky structure; friable; many distinct dark brown (7.5YR 3/2) clay films on faces of peds; slightly acid; clear wavy boundary.
Bt2--53 to 71 centimeters; dark brown (7.5YR 3/4) sandy loam; weak medium subangular blocky structure; friable; common distinct dark brown (7.5YR 3/2) clay films on faces of peds; slightly acid; clear wavy boundary. (Combined thickness of the Bt horizon is 25 to 75 centimeters.)
2BC--71 to 91 centimeters; brown (7.5YR 4/4) loamy sand; weak fine subangular blocky structure; very friable; few dark brown (7.5YR 3/2) lamellae; slightly acid; gradual wavy boundary. (0 to 170 centimeters thick)
2C1--91 to 152 centimeters; dark yellowish brown (10YR 4/4) sand; single grain; loose; slightly acid; gradual wavy boundary.
2C2--152 to 203 centimeters; brown (10YR 5/3) sand; single grain; loose; slightly effervescent; slightly alkaline.
TYPE LOCATION: Major Land Resource Area (MLRA) 103-Central Iowa and Minnesota Till Prairies, Carver County, Minnesota subset; about 1 mile east and 1/2 mile south of East Union; located about 175 feet west and 2,120 feet south of the northeast corner of section 2, T. 114 N., R. 24 W.; USGS Jordan West topographic quadrangle, lat. 44 degrees 42 minutes 44 seconds N. and long. 93 degrees 39 minutes 52 seconds W., NAD83.
RANGE IN CHARACTERISTICS:
Thickness of the mollic epipedon--18 to 50 centimeters
Depth to sandy outwash--50 to 100 centimeters
Depth to carbonates--150 to more than 200 centimeters
Clay content of the particle-size control section (weighted average)--10 to 18 percent
Sand content of the particle-size control section (weighted average)--40 to 70 percent
Ap and A (when present) horizon:
Hue--7.5YR or 10YR
Value--2 or 3
Chroma--1 to 3
Texture--loam or sandy loam
Clay content--6 to 15 percent
Sand content--45 to 70 percent
Rock fragment content--0 to 15 percent gravel, mixed lithology
Reaction--strongly acid to neutral
AB horizon (when present):
Hue--7.5YR or 10YR
Value--3 or 4
Chroma--2 or 3
Texture--loam or sandy loam
Clay content--6 to 15 percent
Sand content--45 to 70 percent
Rock fragment content--0 to 15 percent gravel, mixed lithology
Reaction--strongly acid to neutral
Bt horizon:
Hue--7.5YR or 10YR
Value--3 to 5
Chroma--2 to 6
Texture--loam, sandy loam, or sandy clay loam
Clay content--10 to 18 percent
Sand content--40 to 70 percent
Rock fragment content--0 to 15 percent gravel, mixed lithology
Reaction--strongly acid to neutral
Some pedons have lamellae in the lower part of this horizon
2Bt horizon (when present):
Hue--7.5YR or 10YR
Value--4 or 5
Chroma--3 to 6
Texture--loamy sand, sand, loamy coarse sand, coarse sand, or the gravelly analogues of these textures
Clay content--2 to 10 percent
Sand content--80 to 95 percent
Rock fragment content--0 to 35 percent gravel and 0 to 5 percent cobbles, mixed lithology
Reaction--strongly acid to neutral
2BC horizon (when present):
Hue--7.5YR, 10YR, or 2.5Y
Value--3 to 6
Chroma--3 to 6
Texture--loamy sand, sand, loamy coarse sand, coarse sand, or the gravelly analogues of these textures
Clay content--1 to 10 percent
Sand content--80 to 95 percent
Rock fragment content--0 to 35 percent gravel and 0 to 5 percent cobbles, mixed lithology
Reaction--strongly acid to slightly alkaline
In some pedons the 2BC horizon extends to more than 200 centimeters in depth
2C horizon (when present):
Hue--7.5YR, 10YR, or 2.5Y
Value--4 to 7
Chroma--3 to 6
Texture--sand, coarse sand, gravelly sand, or gravelly coarse sand
Clay content--1 to 5 percent
Sand content--80 to 99 percent
Rock fragment content--0 to 35 percent gravel and 0 to 5 percent cobbles, mixed lithology
Reaction--strongly acid to slightly alkaline
The lower third of the series control section has less than 15 percent very fine sand, silt and clay, also the sum of very fine sand plus fine sand is less than the sum of coarse sand plus very coarse sand
COMPETING SERIES: These are the
Eden Prairie,
Malardi,
Norborne, and
Onarga series.
Eden Prairie--have a sand content of more than 70 percent in the upper third of the series control section and have a rock fragment content of less than 15 percent in the lower half of the series control section
Malardi--have a sand content of more than 70 percent in the upper third of the series control section
Norborne--have a mollic epipedon more than 60 centimeters thick
Onaraga--have a rock fragment content of less than 2 percent in the lower half of the series control section and have a sand content such that the sum of fine sand plus very fine sand is greater than the sum of coarse sand plus very coarse sand in the lower third of the series control section
GEOGRAPHIC SETTING:
Parent material--50 to 100 centimeters of loamy sediments and the underlying sandy and gravelly outwash
Landform--nearly level to convex slopes on outwash plains, valley trains, and moraines and on treads and risers of strath terraces
Slope--0 to 40 percent
Elevation--200 to 400 meters above sea level
Mean annual air temperature--6 to 10 degrees C
Mean annual precipitation--585 to 965 millimeters
Frost-free period--145 to 205 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Dakota,
Dassel,
Dickman,
Kasota, and
Sparta soils.
Dakota--are on landscape positions similar to those of the Rasset soils and have a clay content that averages 18 to 27 percent in the upper half of the particle-size control section
Dassel--are in lower landscape positions in concave swales and depressions and are frequently saturated at the surface of the soil during the wettest periods of normal years
Dickman--are on landscape positions similar to those of the Rasset soils and have a sand content that averages more than 70 percent in the particle-size control section
Kasota--are on landscape positions similar to those of the Rasset soils and have a clay content that averages more than 18 percent in the upper third of the particle-size control section
Sparta--are on higher landscape positions and have a sand content that averages more than 70 percent in the particle-size control section
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--well drained--a frequently saturated zone does not occur within a depth of 1.8 meters during the wettest periods of normal years
Saturated hydraulic conductivity--1.00 to 100.00 micrometers per second in the loamy sediments and 10.00 to 705.00 micrometers percent in the sandy and gravelly sediments
Surface runoff potential--negligible to high
USE AND VEGETATION:
Most areas are cultivated. The principal crops are corn, soybeans, small grain and hay. Some areas are wooded. The native vegetation is mixed deciduous forest and big bluestem, little bluestem, switchgrass, and other grasses of the tall grass prairie.
DISTRIBUTION AND EXTENT:
Physiographic Division--Interior Plains
Physiographic Province--Central Lowland
Physiographic sections--Western lake section, Wisconsin driftless section and Dissected till plains
MLRAs--Central Iowa and Minnesota Till Prairies (103),
Eastern Iowa and Minnesota Till Prairies (104), and
Northern Mississippi Valley Loess Hills (105)
LRR M; east-central and southeastern Minnesota and southwestern Wisconsin
Extent--small
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: St. Paul, Minnesota
SERIES ESTABLISHED: Wright County, Minnesota, 1963.
REMARKS:
Particle-size control section--the zone from a depth of 38 to 71 centimeters;
series control section--the zone from the surface to a depth of 150 centimeters.
Diagnostic horizons and features recognized in this pedon include:
mollic epipedon--the zone from the surface to a depth of 38 centimeters (Ap and A horizons);
argillic horizon--the zone from a depth of 38 to 71 centimeters (Bt1 and 2Bt2 horizons);
udic moisture regime.
Cation-exchange activity class is based on lab data from NSSL, Lincoln, Nebraska.
Taxonomy version--Keys to Soil Taxonomy, tenth edition, 2006.
ADDITIONAL DATA:
Laboratory data--National Soil Survey Laboratory, Lincoln, Nebraska - user pedon id numbers 91WI033002, 91WI035001, 91WI035002, 92WI033002, and 92WI121002 (http://ssldata.nrcs.usda.gov/).