LOCATION BARODA MNEstablished Series
TAXONOMIC CLASS: Very-fine, smectitic, mesic Vertic Argiaquolls
TYPICAL PEDON: Baroda silty clay loam, on a plane level slope, on a glacial lake plain, in a cultivated field. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 23 centimeters; black (10YR 2/1) silty clay loam, very dark gray (10YR 3/1) dry; weak fine subangular blocky structure; friable; common roots; moderately acid; abrupt smooth boundary.
A--23 to 36 centimeters; black (10YR 2/1) silty clay loam, few channels very dark gray (10YR 3/1); weak very fine and fine subangular blocky structure; friable; common roots; strongly acid; clear smooth boundary. (Combined thickness of the A horizon is 25 to 75 centimeters.)
Btg1--36 to 48 centimeters; dark grayish brown (10YR 4/2) clay; strong very fine and fine angular blocky structure; very firm; many thin black (10YR 2/1) and very dark gray (10YR 3/1) clay films on faces of peds; few grayish coats on faces of peds in upper part; many fine prominent strong brown (7.5YR 5/6) redoximorphic concentrations; strongly acid; clear smooth boundary.
Btg2--48 to 56 centimeters; olive gray (5Y 4/2) clay; strong fine angular blocky structure; very firm; many thin and medium dark gray (5Y 4/1) clay films on faces of peds; many fine prominent yellowish brown (10YR 5/6) redoximorphic concentrations; very strongly acid; clear smooth boundary.
Btg3--56 to 69 centimeters; olive gray (5Y 4/2) clay; strong fine angular blocky structure; very firm; many thin and medium black (10YR 2/1) clay films on faces of peds and on surfaces along pores; many fine prominent yellowish brown (10YR 5/6) redoximorphic concentrations; strongly acid; clear smooth boundary.
Btg4--69 to 97 centimeters; olive gray (5Y 5/2) clay; weak and moderate coarse prismatic structure; firm; common black (10YR 2/1) clay films on faces of peds and on surfaces along pores; many fine prominent yellowish brown (10YR 5/6) redoximorphic concentrations; neutral; clear smooth boundary.
Btg5--97 to 117 centimeters; grayish brown (2.5Y 5/2) silty clay loam; weak medium and thick platy structure; friable; common black (10YR 2/1) clay films on faces of peds and on surfaces along pores; many fine distinct light olive brown (2.5Y 5/4) redoximorphic concentrations; neutral; clear smooth boundary. (Combined thickness of the Btg horizon is 40 to 100 centimeters.)
2BCg1--117 to 137 centimeters; grayish brown (2.5Y 5/2) clay loam; weak medium and thick platy structure; friable; few dark clay films on surfaces along pores; few soft lime masses; many fine distinct light olive brown (2.5Y 5/4) redoximorphic concentrations; about 5 percent rock fragments; strongly effervescent; moderately alkaline; clear smooth boundary.
2BCg2--137 to 152 centimeters; grayish brown (2.5Y 5/2) loam; weak fine subangular blocky structure; friable; few soft lime masses; many fine distinct light olive brown (2.5Y 5/4) redoximorphic concentrations; about 5 percent rock fragments; strongly effervescent; moderately alkaline.
TYPE LOCATION: Major Land Resource Area (MLRA) 103-Central Iowa and Minnesota Till Prairies; Blue Earth County, Minnesota subset; located about 100 feet south and 1,200 feet east of the northwest corner of section 10, T. 105 N., R. 27 W.; USGS Sterling Center topographic quadrangle; lat. 43 degrees 55 minutes 14 seconds N. and long. 94 degrees 03 minutes 47 seconds W., NAD 83.
RANGE IN CHARACTERISTICS:
Mollic epipedon thickness--25 to 75 centimeters
Depth to carbonates--85 to 150 centimeters
Depth to glacial till--90 to more than 200 centimeters
Content of clay in the particle-size control section (weighted average)--60 to 75 percent
Content of sand in the particle-size control section (weighted average)--less than 5 percent, fine sand and sand coarser than fine sand
A horizon:
Hue--10YR or is neutral
Value--2 or 3
Chroma--0 or 1
Texture--silty clay loam, silty clay, or clay
Clay content--35 to 50 percent
Sand content--less than 5 percent
Rock fragment content--0 to 2 percent, mixed lithology
Reaction--strongly acid to neutral
Some pedons have E horizons as much as 15 centimeters thick and with platy structure
Btg horizon:
Hue--10YR to 5Y
Value--3 to 5
Chroma--1 or 2
Texture--clay, silty clay or silty clay loam
Clay content--35 to 75 percent
Sand content--less than 5 percent
Rock fragment content--0 to 2 percent, mixed lithology
Reaction--very strongly acid to slightly alkaline
Some pedons have Cg horizons
2BCg horizon:
Hue--2.5Y or 5Y
Value--5 or 6
Chroma--2
Texture--clay loam or loam
Clay content--25 to 40 percent
Sand content--30 to 45 percent
Rock fragment content--2 to 10 percent, mixed lithology
Reaction--slightly alkaline or moderately alkaline
Some pedons have 2Cg horizons
COMPETING SERIES: No other series is in this family.
GEOGRAPHIC SETTING:
Parent material--90 to more than 200 centimeters of clayey glacial lacustrine sediments and the underlying loamy glacial till, sediments are Late Wisconsinan in age
Landform--very slightly convex, plane, or very slightly concave slopes on glacial lake plains
Slope--0 to 2 percent
Elevation--210 to 450 meters above sea level
Mean annual air temperature--7 to 10 degrees C
Mean annual precipitation--650 to 820 millimeters
Frost-free period--130 to 180 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Beauford,
Lura, and
Minnetonka soils.
Beauford--are in landscape positions similar to the Baroda soils and do not have argillic horizons
Lura--are at lower landscape positions in depressions and swales, do not have argillic horizons and have mollic epipedons 60 to 168 centimeters thick
Minnetonka-- are in landscape positions similar to the Baroda soils and have an average clay content of 35 to 60 percent in the particle-size control section
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--poorly drained--these soils are frequently saturated at the soil surface during the wettest portions of normal years
Saturated hydraulic conductivity--0.42 to 1.41 micrometers per second (low)
Surface runoff potential--negligible to medium
USE AND VEGETATION:
Most areas are cultivated. The principal crops are corn and soybeans. The native vegetation is mixed deciduous forest and big bluestem, western wheatgrass, sedges, blue grama and other species of the tall grass prairie that are tolerant of excessive wetness.
DISTRIBUTION AND EXTENT:
Physiographic Division--Interior Plains
Physiographic Province--Central Lowland
Physiographic section--Western lake section
MLRA--Central Iowa and Minnesota Till Prairies (103)
LRR M; south-central Minnesota
Extent--small
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: St. Paul, Minnesota
SERIES ESTABLISHED: Blue Earth County, Minnesota, 1975.
REMARKS:
Particle-size control section--the zone from a depth of 36 to 86 centimeters (Btg1, Btg2, Btg3, and Btg4 horizons);
series control section--the zone from the surface to a depth of 0 to 150 centimeters (Ap, A, Btg1, Btg2, Btg3, Btg4, Btg5, 2BCg1 and 2BCg2 horizons).
Diagnostic horizons and features recognized in this pedon include:
mollic epipedon--the zone from the surface of the soil to a depth of 36 centimeters (Ap and A horizons);
argillic horizon--the zone from a depth of 36 to 117 centimeters (Btg1, Btg2, Btg3, Btg4, and Btg5 horizons);
aquic moisture regime.