LOCATION TUCKERMAN               AR+MO TN

Established Series
Rev. LBW:CH:KJC
11/2018

TUCKERMAN SERIES

The Tuckerman series consists of very deep, poorly drained, moderately slowly permeable soils that formed in loamy alluvium. These soils are on Holocene flood plains and low terraces in the lower Mississippi Valley. Slope gradients range from 0 to 3 percent. Mean annual air temperature is about 62 degrees F, and the mean annual precipitation is about 50 inches.

TAXONOMIC CLASS: Fine-loamy, mixed, active, thermic Typic Endoaqualfs

TYPICAL PEDON: Tuckerman loam, cultivated (Colors are for moist soil unless otherwise stated.)

Ap--0 to 7 inches; dark grayish brown (10YR 4/2) loam; moderate fine and medium granular structure; friable; many fine roots; common fine pores; few fine distinct brownish yellow (10YR 6/8) iron accumulations lining old root channels (oxidized rhizospheres); few fine round hard iron-manganese concretions; moderately acid; abrupt smooth boundary. (4 to 10 inches thick)

Eg1--7 to 12 inches; light brownish gray (10YR 6/2) fine sandy loam; weak coarse subangular blocky structure; friable; common fine roots; few fine and very fine pores; common medium distinct dark yellowish brown (10YR 4/4) and common fine distinct brownish yellow (10YR 6/8) iron accumulations throughout; few fine round iron-manganese concretions; common medium prominent black (10YR 2/1) manganese accumulations on faces of some peds; moderately acid; gradual smooth boundary.

Eg2--12 to 18 inches; light brownish gray (10YR 6/2) and light gray (10YR 7/2) loam; weak coarse subangular blocky structure; friable; common fine roots; common fine pores; common medium distinct dark yellowish brown (10YR 4/4) and common fine distinct brownish yellow (10YR 6/8) iron accumulations throughout; few fine round iron-manganese concretions; few medium prominent black (10YR 2/1) manganese accumulations on faces of some peds; moderately acid; gradual smooth boundary. (Combined thickness of the E horizon ranges from 10 to 16 inches.)

Btg1--18 to 25 inches; light brownish gray (10YR 6/2) loam; weak medium and coarse subangular blocky structure; firm; few fine roots; common fine and medium pores; few faint clay films on faces of peds and lining pores; few medium faint light gray (10YR 7/1) clay depletions on faces of some peds; common medium distinct dark yellowish brown (10YR 4/4, 4/6) and common fine distinct brownish yellow (10YR 6/8) iron accumulations throughout; few medium and coarse round iron-manganese concretions and few medium soft black nodules; very strongly acid; gradual smooth boundary.

Btg2--25 to 36 inches; grayish brown (2.5Y 6/2) clay loam; moderate coarse subangular blocky structure; firm; few fine roots; few fine pores; common distinct clay films on faces of peds and lining pores; common medium distinct dark yellowish brown (10YR 4/4, 4/6) iron accumulations throughout; few fine prominent black (10YR 2/1) manganese accumulations, mainly along old root channels; few fine round iron-manganese concretions and few medium soft black nodules; very strongly acid; clear smooth boundary.

Btg3--36 to 48 inches; light brownish gray (2.5Y 6/2) loam; moderate medium and coarse subangular blocky structure; firm; few fine roots; common fine pores; common distinct clay films on faces of peds and lining pores; common medium distinct dark yellowish brown (10YR 4/6) and strong brown (7.5YR 4/6) iron accumulations throughout; few fine and medium round iron-manganese concretions and few fine soft black nodules; many medium prominent black (10YR 2/1) manganese accumulations on faces of most peds; strongly acid; clear wavy boundary. (Combined thickness of the Btg horizon ranges from 20 to 35 inches.)

BCg--48 to 57 inches; grayish brown (10YR 5/2) fine sandy loam; weak coarse subangular blocky structure; friable; few fine roots; few fine pores; common medium distinct yellowish brown (10YR 5/6) and few fine distinct strong brown (7.5YR 5/6) iron accumulations throughout; few fine and medium iron-manganese concretions and few soft nodules; common medium prominent black (10YR 2/1) manganese accumulations on faces of some peds; moderately acid; clear smooth boundary. (0 to 12 inches thick.)

Cg1--57 to 68 inches; grayish brown (10YR 5/2) loamy fine sand; structureless, massive; friable; common dark yellowish brown (10YR 4/4) and yellowish brown (10YR 5/4) loamy fine sand bedding planes 1/8 to 1/4 inch thick; slightly acid; abrupt smooth boundary.

Cg2--68 to 77 inches; grayish brown (2.5Y 5/2) loam; structureless, massive; friable; few medium distinct dark yellowish brown (10YR 4/4) iron accumulations throughout; two almost continuous, hard calcium carbonate layers about 1/4 inch thick; slightly alkaline; abrupt smooth boundary.

Cg3--77 to 86 inches; dark yellowish brown (10YR 4/4) sand; structureless, single-grain; very friable; common grayish brown (10YR 5/2) and pale brown (10YR 6/3) loamy sand bedding planes 1/8 to 1/4 inch thick; common dark yellowish brown (10YR 4/6) soft iron nodules in bedding planes; moderately alkaline.

TYPE LOCATION: NW1/4SW1/4SW1/4, sec. 11, T. 8 N., R. 1 W., Woodruff County, Arkansas

RANGE OF CHARACTERISTICS: Solum thickness ranges from 40 to more than 60 inches. Combined thickness of the A and E horizons is less than 20 inches. Reaction ranges from moderately acid to very strongly acid in the A, E, BA, BE, B and BC horizons and from strongly acid to moderately alkaline in the C horizon.

The A horizon has hue of 10YR, value of 3 through 5, and chroma of 2 through 4. A horizons with value of 3 are less than 6 inches thick. Masses of iron accumulation and iron depletions range from none to common in shades of brown, yellow, or gray. Texture is fine sandy loam, or loam. Overwash phases of silt loam and silty clay loam are recognized.

The E horizon has hue of 10YR, value of 5, 6 or 7, and chroma of 1 or 2. Masses of iron accumulation and iron depletions are in shades of brown, yellow or gray. Texture is fine sandy loam or loam.

The BA or BE horizon, where present, has hue of 10YR, value of 5 or 6, and chroma of 1 or 2. Masses of iron accumulation and iron depletions are in shades of brown, yellow or gray. Texture is fine sandy loam or loam.

The Btg horizon has hue of 10YR, or 2.5Y, value of 4 through 6, and chroma of 1 or 2. Masses of iron accumulation and iron depletions are in shades of brown, yellow or gray. Texture is loam, sandy clay loam, or clay loam.

The BC horizon has hue of 10YR or 2.5Y, value of 4 through 6, and chroma of 1 or 2. Masses of iron accumulation and iron depletions are in shades of brown, yellow, or gray. Texture is fine sandy loam, sandy loam or loam.

The C horizon has hue of 10YR, value of 4 through 7, and chroma of 1 through 4. Masses of iron accumulation and iron depletions are shades of brown, yellow or gray. Texture is loam, fine sandy loam, sandy loam, loamy fine sand, loamy sand or sand.

COMPETING SERIES: The Yonges series is in the same family. Yonges soils developed in loamy sediments and typically occur on nearly level lower Coastal Plains at 5 to 25 feet above sea level.

GEOGRAPHIC SETTING: Tuckerman soils are on level to nearly level Holocene flood plains and low terraces (2nd bottom) in the Western Lowlands of Arkansas, southeast Missouri and other similar areas in the lower Mississippi Valley; MLRA 131. Slopes range from 0 to 3 percent. Tuckerman soils formed in loamy alluvium. The mean annual air temperature ranges from about 60 to 64 degrees F, and the mean annual precipitation ranges from about 45 to 55 inches.

GEOGRAPHICALLY ASSOCIATED SOILS: These include the Askew, Bonn, Bosket, Foley, and McCrory series. Askew soils occur on slightly higher terrace positions; are in a fine-silty particle-size class; are moderately well drained and moderately permeable. Bosket soils occur on higher terraces; are well drained and moderately permeable. Bonn soils occur on adjacent higher terraces; are in a fine-silty particle-size class; have a natric horizon and very slow permeability. Foley soils occur on adjacent higher terraces; are in a fine-silty particle-size class; have a natric horizon and very slow permeability. McCrory soils occur on slightly higher terrace positions and have a natric horizon.

DRAINAGE AND PERMEABILITY: Poorly drained. Runoff is negligible to low. Permeability is moderately slow. A seasonal water table is within 12 inches of the soil surface from December through April most years. Most areas are subject to flooding for brief to long periods during the winter and early spring months.

USE AND VEGETATION: Most areas have been cleared and are in cultivated crops. Soybeans, grain sorghum and rice are the main crops. Minor areas remain in woodland. The native vegetation was mixed bottomland hardwoods.

DISTRIBUTION AND EXTENT: Western lowlands of Arkansas, southeast Missouri and other similar areas in the lower Mississippi Valley; MLRA 131. The series is of moderate extent.

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: AUBURN, ALABAMA

SERIES ESTABLISHED: Woodruff County, Arkansas, 1966.

REMARKS: Diagnostic horizons and features recognized in this pedon are:

Ochric epipedon-The zone from the surface to a depth of
18 inches (A and E horizons).

Albic horizon-The zone from 7 to 18 inches (Eg1 and Eg2
horizons)

Argillic horizon-The zone from 18 to 48 inches (Btg1,
Btg2 and Btg3 horizons).

Aquic conditions-Endosaturation throughout.

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National Cooperative Soil Survey
U.S.A.