LOCATION DEROIN NEEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, superactive, mesic Mollic Hapludalfs
TYPICAL PEDON: Deroin silty clay loam, on an east facing convex side slope of 7 percent, in cropland. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 7 inches; dark brown (7.5YR 3/2) silty clay loam, brown (10YR 5/3) dry; weak fine and medium granular structure; slightly hard, friable; few fine roots throughout; few fine tubular pores; moderately acid; abrupt smooth boundary. (4 to 9 inches thick)
Bt1--7 to 12 inches; reddish brown (5YR 4/3) silty clay loam, brown (7.5YR 5/4) dry; weak fine and medium prismatic structure parting to weak fine subangular blocky; slightly hard, friable; few fine roots throughout; few fine tubular pores; faint discontinuous clay films on faces of peds; few fine irregular iron-manganese concretions; slightly acid; gradual smooth boundary.
Bt2--12 to 18 inches; reddish brown (5YR 4/4) silty clay loam, brown (7.5YR 5/4) dry; coarse subangular blocky structure parting to weak fine and medium subangular; slightly hard, friable; few fine roots throughout; few fine tubular pores; distinct discontinuous clay films on faces of peds; few fine irregular iron-manganese concretions; neutral; gradual smooth boundary.
Bt3--18 to 40 inches; reddish brown (5YR 4/4) silty clay loam, brown (7.5YR 5/4) dry; weak coarse prismatic structure parting to weak coarse subangular blocky; slightly hard, friable; few fine tubular pores; distinct discontinuous clay films on faces of peds; few fine irregular iron-manganese concretions; slightly acid; gradual smooth boundary. (Combined thickness of the Bt horizons is 16 to 40 inches.)
BC--40 to 50 inches; reddish brown (5YR 4/4) silty clay loam, reddish brown (5YR 5/4) dry; weak fine and medium subangular blocky structure; slightly hard, friable; few fine irregular iron-manganese concretions; slightly acid; gradual smooth boundary. (0 to 15 inches thick)
C--50 to 80 inches; reddish brown (5YR 4/4) silty clay loam, reddish brown (5YR 5/4) dry; massive; slightly hard, friable; few fine irregular iron-manganese concretions; slightly acid. Few fine sand grains throughout the profile.
TYPE LOCATION: Richardson County, Nebraska; about 8 miles north and 5 miles west of Falls City; 100 feet south and 1050 feet east of the northwest corner of Section 35, T. 3 N., R. 15 E. USGS Verdon topographic quadrangle; latitude 40 degrees, 11 minutes, 20 seconds north and longitude 95 degrees, 42 minutes, 19 seconds west.
RANGE IN CHARACTERISTICS:
Soil moisture: The soil moisture control section is Udic moisture regime.
Mean annual soil temperature: 53 to 56 degrees F
Depth to argillic horizon: 4 to 9 inches
Depth to secondary calcium carbonate: commonly more than 60 inches, but some pedons contain carbonates between 30 to 60 inches
Thickness of mollic colors: 4 to 9 inches
Particle-size control section (weighted average):
Clay content: 27 to 35 percent
Sand content: 5 to 30 percent
A horizon:
Hue: 7.5YR or 10YR
Value: 2 or 3 moist, 3 to 5 dry
Chroma: 2 or 3
Texture: silty clay loam or clay loam
Clay content: 27 to 35 percent
Reaction: Moderately acid or slightly acid
Bt horizon:
Hue: 7.5YR or 5YR
Value: 3 to 5 moist, 4 to 6 dry
Chroma: 3 to 6
Texture: silty clay loam or clay loam
Clay content: 27 to 35 percent
Sand content: 5 to 30 percent
Reaction: Slightly acid to slightly alkaline
BC horizon:
Hue: 7.5YR or 5YR
Value: 4 or 5 moist, 5 to 7 dry
Chroma: 3 to 6
Texture: silty clay loam or clay loam
Clay content: 27 to 35 percent
Sand content: 5 to 25 percent very fine sand
Reaction: Slightly acid to slightly alkaline
C horizon:
Hue: 7.5YR or 5YR
Value: 4 or 5 moist, 5 to 7 dry
Chroma: 3 to 6
Texture: Silty clay loam, clay loam, loam or silt loam
Clay content: 24 to 32 percent
Sand content: 5 to 25 percent very fine sand
Reaction: Slightly acid to slightly alkaline
COMPETING SERIES: These are the Batvia,
Bowes,
Churchtown,
Ella,
Festina,
Greenbush,
Harvard,
Hersey,
Mannon,
Mellott,
Mt. Carroll,
Watkins, and
Yutan soils.
Batvia soils have 27 percent or less clay in the Ap horizon and have 2Bt and 2C horizons which are stratified clay loam to sandy loam.
Bowes soils have 27 percent or less clay in the Ap horizon and have 2B and 2C horizons which have more than 15 percent gravel.
Churchtown soils have 10 to 55 percent sand in the upper one-half of the control section.
Ella soils have redox features or saturation in the series control section and have a clay content that averages from 18 to 27 percent in the particle-size control section and throughout the silty deposits.
Festina soils have evidence of stratification of the coarse and fine silts in the upper 40 inches of the solum.
Greenbush soils have an E horizon, are moderately well drained, and do not have hue of 7.5YR or 5YR in the series control section.
Harvard soils have 27 percent or less clay in the Ap horizon and have a 2C horizon which is stratified.
Hersey soils have redox features or saturation in the series control section and the particle-size control section averages from 18 to 27 percent clay.
Mannon soils average less than 27 percent clay in the middle part of the control section, are moderately well drained, and do not have hue of 7.5YR or 5YR in the series control section.
Mellott soils have 22 percent or less clay in the Ap horizon and have 3C horizons which have 5 to 10 percent gravel.
Mt. Carroll soils have less than 27 percent clay throughout the series control section.
Watkins soils have an E horizon and have 24 percent or less clay in the Ap and E horizons.
Yutan soils have hues of 10YR and 2.5Y in the Bt and C horizons and have less than 10 percent sand in the series control section.
GEOGRAPHIC SETTING:
Parent material: Reddish colored silty material, presumed to be Loveland loess
Landform: Convex shoulders, back slopes, and narrow summits on uplands.
Slopes: 2 to 17 percent
Mean annual temperature: 51 to 54 degrees F
Mean annual precipitation: 28 to 35 inches
Frost-free period: 160 to 180 days.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Geary,
Judson,
Malmo,
Mayberry,
Morrill and
Yutan soils.
Geary, Mayberry and Morrill soils have a mollic epipedon 10 to 24 inches thick.
Judson soils have mollic epipedons greater than 24 inches thick, and are on footslopes.
Mayberry and Malmo soils formed in glacial till and average more sand and clay in the particle size control section, and are on slightly lower positions on the landscape.
Morrill soils formed in loamy glacial till or outwash deposits and have more sand in the control section.
Yutan soils have hues yellower than 7.5YR in the series control section and have formed in younger loess.
DRAINAGE AND PERMEABILITY:
Drainage: Well
Runoff: Low or medium
Permeability: Moderate
USE AND VEGETATION: Most areas of Deroin soils are in cropland. Corn, soybeans, grain sorghum and winter wheat are the principle crops.
DISTRIBUTION AND EXTENT: Southeastern Nebraska and possibly northeastern Kansas. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Denver, Colorado
SERIES ESTABLISHED: Saunders County, Nebraska, MLRA 106, 1993.
REMARKS:
Diagnostic horizons and features recognized in this pedon are:
Particle-size control section: The zone from 7 to 40 inches. (Bt1, Bt2, and Bt3 horizons)
Ochric epipedon: The zone from 0 to 7 inches. (Ap horizons)
Argillic horizon: The zone from 7 to 40 inches. (Bt1, Bt2 and Bt3 horizons)
ADDITIONAL DATA: These soils are assumed to have originally classified as fine-silty, mixed, mesic Typic Argiudolls and were mapped as Geary series, eroded. However, because of severe erosion, these soils no longer have the thick dark surface soil necessary for this classification. In addition, the part of the soil containing the most clay is now at or near the surface. These changes have a significant affect on the use and management of these soils. These soils are now classified as Mollic Hapludalfs.