LOCATION UNIONGROVE MN
Established Series
Rev. RAL-TCJ-TWN
03/2014
UNIONGROVE SERIES
The Uniongrove series consists of very deep, poorly drained soils formed in loamy till. These soils are on nearly level and concave slopes on moraines. Slope ranges from 0 to 2 percent. Mean annual air temperature is about 8 degrees C. Mean annual precipitation is about 735 millimeters.
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, mesic Typic Endoaquolls
TYPICAL PEDON: Uniongrove loam, on a nearly level slope, on a glacial moraine, in a cultivated field, at an elevation of about 354 meters above sea level. (Colors are for moist soil unless otherwise noted).
Ap--0 to 23 centimeters; black (N 2/0) loam, very dark gray (N 3/0) dry; weak fine subangular blocky structure; friable; about 1 percent gravel, about 1 percent cobbles; slightly acid; abrupt smooth boundary.
A--23 to 41 centimeters; very dark gray (10YR 3/1) loam, gray (10YR 5/1) dry; weak fine subangular blocky structure parting to weak very fine subangular blocky; friable; about 1 percent gravel; about 1 percent cobbles; neutral; clear smooth boundary.
Bg1--41 to 61 centimeters; olive gray (5Y 4/2) loam; weak medium subangular blocky structure parting to weak very fine subangular blocky; friable; very dark gray (10YR 3/1) organic coats on faces of peds; few fine prominent light olive brown (2.5Y 5/6) concentrations; about 3 percent gravel; about 1 percent cobbles; neutral; clear smooth boundary.
Bg2--61 to 76 centimeters; olive gray (5Y 5/2) fine sandy loam; weak medium subangular blocky structure parting to weak very fine subangular blocky; very friable; common fine prominent light olive brown (2.5Y 5/6) iron concentrations; about 3 percent gravel; about 2 percent cobbles; neutral; clear smooth boundary.
Bkg1--76 to 97 centimeters; olive gray (5Y 5/2) fine sandy loam; weak medium subangular blocky structure parting to weak very fine subangular blocky; very friable; common fine irregular soft white (10YR 8/1) calcium carbonate concentrations distributed uniformly throughout the horizon; common fine prominent light olive brown (2.5Y 5/6) iron concentrations and few distinct light brownish gray (2.5Y 6/2) iron depletions; about 5 percent gravel; about 3 percent cobbles; violently effervescent; slightly alkaline; clear smooth boundary.
Bkg2--97 to 152 centimeters; light olive gray (5Y 6/2) fine sandy loam; weak coarse subangular blocky structure; very friable; common fine irregular soft white (10YR 8/1) calcium carbonate concentrations distributed uniformly throughout the horizon; common fine prominent light olive brown (2.5Y 5/6) iron concentrations and few distinct light brownish gray (2.5Y 6/2) iron depletions; about 7 percent gravel; about 4 percent cobbles; violently effervescent; slightly alkaline.
BCkg--152 to 203 centimeters; gray (5Y 6/1) fine sandy loam; massive; very friable; few fine irregular soft white (10YR 8/1) calcium carbonate concentrations distributed uniformly throughout the horizon; many medium prominent yellowish brown (10YR 5/6) iron concentrations; about 7 percent gravel; about 4 percent cobbles; strongly effervescent; moderately alkaline.
TYPE LOCATION: Major Land Resource Area (MLRA) 103-Central Iowa and Minnesota Till Prairies, Meeker County, Minnesota subset; about 3 1/2 miles west and 1/2 mile north of Manannah; located about 1,500 feet east and 1,525 feet south of the northwest corner of section 27, T. 121 N., R. 32 W.; USGS Lake Koronis topographic quadrangle; lat. 45 degrees 15 minutes 51 seconds N. and long. 94 degrees 41 minutes 47 seconds W., NAD 83.
RANGE IN CHARACTERISTICS:
Mollic epipedon thickness--25 to 60 centimeters
Depth to carbonates--40 to 110 centimeters
Depth to bedrock--more than 200 centimeters
Clay content of particle-size control section (weighted average)--14 to 18 percent
Sand content of particle-size control section (weighted average)--35 to 55 percent
Ap or A horizon:
Hue--10YR, 2.5Y, or is neutral
Value--2 or 3
Chroma--0 or 2
Texture--loam or sandy clay loam
Clay content--20 to 25 percent
Sand content--35 to 65 percent
Rock fragment content--2 to 6 percent
Reaction--pH 6.1 to 7.3
Thickness--25 to 60 centimeters
AB horizon (when present):
Hue--10YR, 2.5Y, or is neutral
Value--2 or 3
Chroma--1 or 2
Texture--loam or sandy clay loam
Clay content--20 to 25 percent
Sand content--35 to 65 percent
Rock fragment content--2 to 6 percent
Reaction--pH 6.1 to 7.3
Thickness--0 to 25 centimeters
Bg horizon:
Hue--2.5Y or 5Y
Value--4 or 5
Chroma--1 or 2
Texture--fine sandy loam, sandy loam, loam, or sandy clay loam
Clay content--14 to 23 percent
Sand content--35 to 65 percent
Rock fragment content--2 to 6 percent
Reaction--pH 6.1 to 7.3
Thickness--10 to 60 centimeters
Bkg horizon:
Hue--5Y
Value--5 or 6
Chroma--2 to 4
Texture--fine sandy loam, sandy loam, loam, or sandy clay loam
Clay content--10 to 16 percent
Sand content--40 to 65 percent
Rock fragment content--3 to 6 percent gravel; 3 to 8 percent cobbles and stones
Calcium carbonate equivalent--10 to 25 percent
Reaction--pH 7.4 to 7.8
Thickness--50 to 100 centimeters
BCkg, BCg (when present), or Cg (when present) horizon:
Hue--2.5Y or 5Y
Value--5 or 6
Chroma--1 to 4
Texture--fine sandy loam, sandy loam, loam, or sandy clay loam
Clay content--12 to 18 percent
Sand content--40 to 65 percent
Rock fragment content--3 to 6 percent gravel; 3 to 8 percent cobbles and stones
Calcium carbonate equivalent--10 to 25 percent
Reaction--pH 7.4 to 7.8
COMPETING SERIES: These are the
Darfur,
Dassel,
Gilford,
Goodell,
Hanska,
Jubilee,
Lyles,
Monon,
Mudgepond,
Overshue,
Toolesboro, and
Whitepost series. Darfur--do not have rock fragments in the series control section
Dassel--have a sand content of more than 65 percent in the lower third of the series control section
Gilford--have a sand content of more than 65 percent in the lower third of the series control section
Goodell--have horizons with a sand content of more than 65 percent in the series control section
Hanska--have a sand content of 75 to 95 percent in the lower third of the series control section
Jubilee--have an aridic moisture regime during the growing season in years when precipitation is within one standard deviation of the 30 year mean of annual precipitation
Lyles--have subhorizons in the lower one-fourth of the control section that average more than 65 percent sand
Monon--have a lithic contact within a depth of 200 centimeters
Mudgepond--do not have a calcic horizon
Overshue--have a clay content that averages more than 20 percent in the lower third of the series control section
Toolesboro--have a sand content that averages 65 to 80 percent in the particle-size control section
Whitepost--have a clay content of 27 to 60 percent in the lower third of the series control section
GEOGRAPHIC SETTING:
Parent material--loamy till of the Wadena Lobe of Wisconsin age
Landform--nearly level and concave positions on moraines
Slope--0 to 2 percent
Elevation--300 to 400 meters above sea level
Mean annual air temperature--6 to 10 degrees C
Mean annual precipitation--585 to 890 millimeters
Frost-free period--155 to 200 days
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Arctander,
Crowriver,
Grovecity,
Lundlake, and
Swedegrove soils.
Arctander--are on landscape positions similar to those of the Uniongrove soils and and have mollic epipedons 60 to 150 centimeters thick
Crowriver--are on slightly higher landscape positions on rims and flats of depressions and have carbonates within a depth of 10 centimeters
Grovecity--are on higher landscape positions and have a frequently saturated zone between depths 0.75 and 1.2 meters during the wettest periods of years when precipitation is within one standard deviation of 30 year mean of annual precipitation
Lundlake--are on lower landscape positions in depressions and have a mollic epipedon greater than 60 centimeters thick
Swedegrove--are on landscape positions similar to those of the Uniongrove soils and have carbonates in all parts between depths of 25 to 50 centimeters
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--poorly drained--in an undrained condition, these soils are frequently saturated from the surface of the soil to a depth of 0.3 meter during the wettest periods of years when precipitation is within one standard deviation of the 30 year mean of annual precipitation
Saturated hydraulic conductivity--10.00 to 100.00 micrometers per second
USE AND VEGETATION:
Most areas are artificially drained and cropped intensively to corn and soybeans. Small grain and hay are other major crops. Reed canarygrass commonly dominates partially drained pasture. Native vegetation is predominantly wet-site tall prairie species such as prairie cordgrass, switchgrass, big bluestem, wooly sedge, giant goldenrod and Canada goldenrod.
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; west-central and central Minnesota
Extent--moderate
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: St. Paul, Minnesota.
SERIES ESTABLISHED: Meeker County, Minnesota, 1995.
REMARKS:
Particle-size control section--the zone from a depth of 25 to 100 centimeters;
series control section--the zone from the surface of the soil to a depth of 150 centimeters.
Diagnostic horizons and other features recognized in this pedon are:
mollic epipedon--the zone from the surface of the soil to a depth of 41 centimeters (Ap and A horizon);
cambic horizon--the zone from a depth of 41 to 152 centimeters (Bg and Bk horizons);
aquic moisture regime.
Cation-exchange activity class is supported by lab data and from similar soils in the surrounding area.
Taxonomy version--Keys to Soil Taxonomy, tenth edition, 2006.
ADDITIONAL DATA:
Laboratory data--Refer to Minnesota Agricultural Experiment Station Central File Code numbers 4021, 4303, 4422, 4029 and 4416 for results of laboratory analyses of some pedons of this series.
National Cooperative Soil Survey
U.S.A.