LOCATION MCCRORY AR

Established Series
Rev. LBW
04/2017

MCCRORY SERIES

The McCrory series consists of very deep, poorly drained, moderately slowly permeable soils that formed in loamy alluvium. These soils are on level to nearly level Holocene terraces in the Western Lowlands of the Lower Mississippi Valley; MLRA 131. Slopes range from 0 to 2 percent.

TAXONOMIC CLASS: Fine-loamy, mixed, active, thermic Albic Glossic Natraqualfs

TYPICAL PEDON: McCrory fine sandy loam--woodland.
(Colors are for moist soil unless otherwise stated.)

Ap1 - 0 to 3 inches; brown (10YR 5/3) fine sandy loam; moderate medium granular structure; friable; few fine pores; many fine roots; few fine distinct yellowish brown (10YR 5/6) iron accumulations on faces of peds; strongly acid; clear smooth boundary.

Ap2 - 3 to 7 inches; grayish brown (10YR 5/2) fine sandy loam; weak medium subangular blocky structure; friable; common fine pores; common fine roots; common medium distinct yellowish brown (10YR 5/6) iron accumulations on faces of peds; dark yellowish brown (10YR 4/4) iron accumulations in some root channels and pores; very strongly acid; clear smooth boundary. (Combined thickness of the A horizon ranges from 3 to 10 inches.)

Eg - 7 to 15 inches; grayish brown (10YR 5/2) fine sandy loam; weak medium subangular blocky structure; friable; many fine pores; few fine roots; common medium distinct brown (10YR 4/3) and few fine distinct yellowish brown (10YR 5/6) iron accumulations on faces of peds; dark yellowish brown (10YR 4/4) iron accumulations in some root channels and pores; few fine and medium dark iron-manganese concretions; moderately acid; clear wavy boundary. (4 to 12 inches thick)

Btg/Eg - 15 to 20 inches; (Btg) light brownish gray (10YR 6/2) and grayish brown (10YR 5/2) fine sandy loam; weak medium subangular blocky structure; friable; common fine and few medium pores; few fine roots; few faint grayish brown (10YR 5/2) clay films on faces of some peds and lining some pores and root channels; many medium and coarse distinct strong brown (7.5YR 5/8) iron accumulations in matrix; few fine hard black to brown iron-manganese concretions; (Eg) pockets and streaks of faint gray (10YR 6/1) silt loam clay depletions on vertical ped faces making up about 10 percent of horizon; neutral; clear wavy boundary. (0 to 10 inches thick)

Btng1 - 20 to 28 inches; light brownish gray (10YR 6/2) fine sandy loam; weak coarse prismatic parting to weak medium subangular blocky structure; friable; few fine pores; few fine roots; few faint clay films on faces of some peds and lining most pores; common medium faint grayish brown (10YR 5/2) and common medium and coarse strong brown (7.5YR 5/6, 5/8) iron accumulations in matrix; common black (10YR 2/1) manganese accumulations on faces of some peds and lining some pores; few fine and medium black to brown hard iron-manganese concretions; slightly alkaline; clear smooth boundary.

Btng2 - 28-36 inches; grayish brown (10YR 5/2) fine sandy loam; weak coarse prismatic parting to weak medium subangular blocky structure; firm; few fine pores; few fine roots; few faint clay films on faces of some peds and lining some pores and root channls; common fine and medium distinct brown (10YR 4/3) and few fine distinct yellowish brown (10YR 5/6) iron accumulations; common medium black to brown hard iron-manganese concretions; moderately alkaline; clear smooth boundary.

Btng3 - 36-51 inches; grayish brown (10YR 5/2) sandy clay loam; weak coarse prismatic parting to weak medium subangular blocky structure; firm; few fine pores; few fine roots; many distinct clay films on faces of some peds and lining some pores and root channels; few fine and medium distinct brown (10YR 4/3) and few fine distinct yellowish brown (10YR 5/6) iron accumulations; many fine and medium black (10YR 2/1) manganese accumulations on faces of peds and interiors of prisms; many medium black to brown hard iron-manganese concretions; strongly alkaline; clear smooth boundary.

Btng4 - 51-65 inches; grayish brown (2.5Y 5/2) fine sandy loam; weak coarse subangular blocky structure; firm; common fine pores; few faint clay films on faces of some peds and lining some pores; few medium distinct brown (10YR 4/3) iron accumulations; common fine and medium black (10YR 2/1) manganese accumulations on faces of peds; few fine black to brown hard iron-manganese concretions; few fine and medium calcium carbonate concretions; strongly alkaline; gradual wavy boundary.

Btng5 - 65-70 inches; grayish brown (2.5Y 5/2) sandy clay loam; weak coarse subangular blocky structure; firm; common fine pores; few faint clay films on faces of some peds and lining some pores; few medium distinct brown (10YR 4/3) iron accumulations; common fine and medium black (10YR 2/1) manganese accumulations on faces of peds; few fine and medium black to brown hard iron-manganese concretions; few fine and medium calcium carbonate concretions; common white (10YR 8/1) powdery, barite crystals on faces of some peds; moderately alkaline; clear wavy boundary. (Combined thickness of the Btng horizon ranges from 40 to 60 inches.)

C1 - 70 to 83 inches; yellowish brown (10YR 5/6), pale brown (10YR 6/3) and brown (10YR 5/3) fine sand; structureless, single-grain; friable; faint bedding planes; a continuous band of strong brown (7.5YR 5/8) iron accumulations at contact with horizon above; few iron-manganese coatings on some sand grains; moderately alkaline; clear smooth boundary. (0 to 15 inches thick)

C2 - 83 to 98 inches; pale brown (10YR 6/3) and brown (10YR 5/3) fine sand; structureless, single-grain; friable; few iron-manganese coatings on sand grains; common coarse faint grayish brown (10YR 5/2) iron depletions in matrix; slightly alkaline.

TYPE LOCATION: Woodruff County, Arkansas; SE1/4SE1/4NE1/4, sec. 5, T.8N., R.3W.

RANGE IN CHARACTERISTICS: Solum thickness ranges from 40 to 80 inches or more. Reaction ranges from very strongly acid to slightly acid in the A and E horizons and neutral to strongly alkaline in the BA, Bt, BC and C horizons.

The A horizon has hue of 10YR, value 3 or 4, and chroma 1 or 2. Cultivated areas have an Ap horizon of 10YR hue, value 4 or 5, and chroma 2 or 3. A horizons with value of 3 are less than 6 inches thick. Iron accumulations and depletions are in shades of brown and gray. Texture is sandy loam or fine sandy loam.

The E horizon and E part of the Btg/Eg horizon has hue of 10YR, value 5 or 6, and chroma 1 or 2. Iron accumulations and depletions are in shades of gray, yellow or brown. Texture is fine sandy loam, sandy loam or loamy fine sand.

The BA or BE horizon, where present, has hue of 10YR, value of 4 to 6, and chroma of 1 or 2. Texture is sandy loam, or fine sandy loam.

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

The Btgn horizons have hue of 10YR or 2.5Y, value 4 through 6, and chroma 1 or 2. Iron accumulations are depletions are in shades of brown, yellow, and gray. Texture is fine sandy loam, sandy clay loam or loam. Sodium saturation is more than 15 percent.

The BC horizon, where present, has hue of 10YR or 2.5Y, value of 5 or 6, and chroma of 1 or 2. Iron accumulations and depletions are in shades of brown, yellow or gray. Texture is sandy loam, fine sandy loam or loam. Sodium saturation is typically more than 15 percent.

The C horizon has hue of 10YR or 2.5Y, value of 5 or 6, and chroma of 2 to 6. Iron accumulations and depletions are in shades of brown, yellow or gray. Texture is sandy loam, fine sandy loam, loamy fine sand or fine sand.

COMPETING SERIES: McCrory is the only series in this family.

GEOGRAPHIC SETTING: McCrory soils are on level to nearly level Holocene terraces in the Western Lowlands of northeast Arkansas in the lower Mississippi Valley; MLRA 131. The soil formed in loamy alluvium. Average annual temperature at the type location is 61 degrees F. The average annual precipitation is about 50 inches.

GEOGRAPHICALLY ASSOCIATED SOILS: These include the Bonn, Bosket, Foley, Lafe, and Tuckerman series. Bonn, Foley and Lafe are on higher terraces and in a fine-silty family. Bosket and Tuckerman soils do not have natric horizons.

DRAINAGE AND PERMEABILITY: Poorly drained. Runoff is negligible to low. Permeability is moderately slow. An apparent seasonal water table is within 1 foot of the soil surface during the winter and early spring most years.

USE AND VEGETATION: Much of the soil has been cleared and is used for rice, cotton, and soybeans. Minor areas are in pasture. Native vegetation consists of hardwoods such as oaks, gum, hackberry, and elm.

DISTRIBUTION AND EXTENT: Lower Mississippi Valley, mainly in Arkansas and Missouri, and possibly Louisiana. 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-surface to a depth of 15 inches (Ap and E horizons)

Albic horizon-7 to 15 inches (Eg)

Argillic horizon-15 to 70 inches (Btg and Btgn horizons)

Natric horizon-20 to 70 inches (Btgn horizon)

The McCrory series would have been classified formerly as a solodized-Solonetz.

National Cooperative Soil Survey
U.S.A.