LOCATION KENNER                  LA+FL

Established Series
Rev. WLC-SDM-CLN
10/2018

KENNER SERIES

The Kenner series consists of very deep, very poorly drained, very slowly permeable, organic soils. These soils formed in herbaceous plant remains stratified with clayey alluvium. They are in fresh water marshes along the Gulf of Mexico. Slope ranges from 0 to 0.2 percent.

TAXONOMIC CLASS: Euic, hyperthermic Fluvaquentic Haplosaprists

TYPICAL PEDON: Kenner muck--freshwater marsh. (Colors are for wet soil and are the same for broken, pressed, and rubbed conditions.)

Oe--0 to 12 inches; very dark gray (10YR 3/1) muck; about 40 percent fiber, 18 percent rubbed; weak fine granular structure; slightly fluid, flows with difficulty between fingers when squeezed, leaves a large residue in hand; many coarse live roots; dominantly herbaceous fiber; about 45 percent mineral; neutral; abrupt smooth boundary. (6 to 14 inches thick)

Cg--12 to 19 inches; gray (5Y 5/1) clay; massive; very fluid, flows easily between fingers when squeezed and leaves hand empty; few fine live roots; neutral; abrupt smooth boundary. (1 to 10 inches thick)

Oa1--19 to 23 inches; very dark grayish brown (10YR 3/2) muck; about 20 percent fiber, 3 percent rubbed; massive; moderately fluid, flows easily between fingers when squeezed and leaves a small residue in hand; few fine live roots; dominantly herbaceous fiber; about 50 percent mineral; moderately acid; abrupt smooth boundary. (3 to 15 inches thick)

Oa2--23 to 38 inches; very dark gray (10YR 3/1) muck; about 15 percent fiber, 1 percent rubbed; massive; very fluid, flows easily between fingers when squeezed and leaves hand empty; dominantly herbaceous fiber; about 50 percent mineral; slightly acid; abrupt smooth boundary. (6 to 30 inches thick)

C'g--38 to 42 inches; dark gray (5Y 4/1) clay; massive; very fluid, flows easily between fingers when squeezed and leaves hand empty; slightly alkaline; abrupt smooth boundary. (1 to 10 inches thick)

O'a--42 to 108 inches; black (10YR 2/1) muck; about 15 percent fiber, 2 percent rubbed; massive; moderately fluid, flows easily between fingers when squeezed leaving a small residue in hand; dominantly herbaceous fiber; about 65 percent mineral; several 1/2 inch strata with a fiber content ranging from 10 to 30 percent; slightly alkaline.

TYPE LOCATION: Jefferson Parish, Louisiana; about 2.5 miles southwest of waterway and 1/2 mile west of Bayou Segnette, near southwest end; 330 feet southeast of Lake Cataouatchie protection levee canal. sec. 92, T. 14S., R. 22 E.

RANGE IN CHARACTERISTICS:
Solum thickness: Thickness of the organic material with thin mineral layers ranges from 51 to more than 100 inches
Redoximorphic features: Gleyed matrix in the mineral layers
Other distinctive soil features: The n-value ranges from 0.7 to more than 1 throughout. Thin mineral strata are at 16 to 51 inches deep
Concentrated minerals: The sodium absorption ratio ranges from about 1 to 12 and the exchangeable sodium percentage ranges from about 1 to 14 in more than half the subsurface tier. The control section is nonsaline (EC less than 2 dS/m).

Surface tier of the Oa horizon:
Color: Hue 7.5YR or 10YR, value 2 to 4, and chroma 1 to 3.
Texture: Muck; some pedons have a thin over-wash mineral surface layer.
Other features: The rubbed fiber content ranges from 5 to 60 percent and the mineral content typically ranges from 40 to 70 percent.
Reaction: Moderately acid to moderately alkaline
Thickness: 12 inches

Subsurface tier of the Oa horizon:
Color: Hue 7.5YR or 10YR, value 2 or 3, and chroma 1 to 3.
Texture: Muck
Other features: Rubbed fiber content ranges from 1 to 8 percent.
Reaction: Moderately acid to moderately alkaline
Thickness: 24 inches

Bottom tier of the Oa horizon:
Color: Hue 5YR or 10YR, value 2 or 3, and chroma 1 to 3.
Texture: Muck
Other features: Rubbed fiber content ranges from 1 to 8 percent.
Reaction: Moderately acid to moderately alkaline
Thickness: 15 to more than 40 inches

Cg and C'g horizon:
Color: Hue 10YR to 5GY, or neutral, value 3 to 5, and chroma 1. Upon exposure to air the color range will change to hue 10YR, value 2 to 4, and chroma 1.
Redoximorphic features: Gleyed matrix
Texture: Clay, silty clay, or mucky clay
Other features: Very fluid manner of failure
Reaction: Neutral to moderately alkaline
Thickness: Individual strata that are within the organic layers range from 1 to 10 inches. Thicker mineral layers may be present below a depth of 51 inches.

COMPETING SERIES: There are no other series in the same family. Similar soils are the Allemands, Belhaven, Dare, Dorovan, Lafitte, Mattamuskeet, Maurepas, Okeechobee, Pamlico, Ponzer, Pungo, Terra Ceia, and Tomoka series. Belhaven, Dare, Dorovan, Mattamuskeet, Pamlico, Ponzer, and Pungo series are extremely or strongly acid, undrained, in all parts of the control section. Allemands and Tomoka series as well as Belhaven, Mattamuskeet, and Ponzer soils have thick mineral layers above 51 inches. Lafitte, Maurepas, Okeechobee, and Terra Ceia soils do not have thin mineral layers within the 12 to 51 inch control section. In addition, Lafitte soils have a sodium absorption ratio of 12 to 18 and exchangeable sodium percentage of 8 to 27 in the subsurface tier. Also, Okeechobee and Pungo soils have layers in the 12 to 51 inch section that have 10 to 33 percent rubbed fiber content.

GEOGRAPHIC SETTING: Kenner soils are in large freshwater marshes of the lower Mississippi river delta and coastal areas. Elevations are approximately 2 feet above mean sea level and lower. They formed from herbaceous plant remains stratified with dominantly clayey alluvium. The climate is subtropical. Near the type location, the mean annual precipitation is about 65 inches and the mean annual air temperature is about 70 degrees F.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the closely related Allemands soils and the Barbary, Carlin, Larose, and Sharkey soils. Carlin soils have a water layer below the surface tier. Barbary, Larose, and Sharkey soils are mineral soils.

DRAINAGE AND PERMEABILITY: Very poorly drained or poorly drained; the water table ranges from 1 foot above to 0.5 foot below the subsurface unless protected and pumped. During tropical storms, floodwaters are 4 feet deep or more. In protected and pumped areas, the water table typically is maintained at a depth of from 1 to 4 feet below the subsurface. Internal drainage is very slow to none. Permeability is very slow in mineral layers and rapid in organic layers.

USE AND VEGETATION: The main use of these soils is wildlife habitat. Native vegetation is dominantly paille fine, cattail, common reed, bulrush, bulltongue, alligatorweed, smartweed, lotus, water hyacinth, and cutgrass. A few areas are diked and drained by pumps, then used for urban development.

DISTRIBUTION AND EXTENT: Gulf Coast Marshes (MLRA 151) of Louisiana and Florida. Extent is large.

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

SERIES ESTABLISHED: Jefferson Parish, Louisiana, 1972.

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

Hemic soil materials--0 to 12 inches (Oe horizon).
Sapric soil materials--19 to 38 and 42 to 108 inches (Oa horizons).
Fluvaquentic feature--12 to 19 and 38 to 42 inches; mineral layers within organic soil layers (Cg horizons).

Ecological Site: Fresh Organic Marsh.

ADDITIONAL DATA: NSSL data (S71LA-051-001) in SIR 35, p143 from Jefferson Parish.

TAXONOMIC VERSION: Keys to Soil Taxonomy, Ninth Edition, 2003.

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National Cooperative Soil Survey
U.S.A.