LOCATION LILBOURN MO+KY
Established Series
Rev. BLB-RLT
02/2013
LILBOURN SERIES
The Lilbourn series consists of very deep, somewhat poorly drained, moderately permeable soils formed in loamy alluvium of recent deposition over buried alluvium of an older age on nearly level to depressional terraces or natural levees. Slopes range from 0 to 1 percent. Mean annual temperature is about about 61 degrees F, and mean annual precipitation is about about 50 inches.
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, nonacid, thermic Aeric Fluvaquents
TYPICAL PEDON: Lilbourn fine sandy loam - cultivated. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 8 inches; brown (10YR 4/3) fine sandy loam; weak fine granular structure; friable; many fine roots; few fine dark concretions (iron and manganese oxides); slightly acid; abrupt smooth boundary. (6 to 10 inches thick)
A--8 to 15 inches; dark grayish brown (10YR 4/2) fine sandy loam; common fine distinct dark yellowish brown (10YR 3/4) mottles; weak medium granular structure; very friable; common fine roots and pores; few fine dark concretions (iron and manganese oxides); slightly acid; clear wavy boundary. (4 to 12 inches thick)
C1--15 to 37 inches; grayish brown (10YR 5/2) fine sandy loam; common medium distinct brown (10YR 4/3) and dark yellowish brown (10YR 4/4) mottles and few fine faint pale brown (10YR 6/3) mottles; massive, thin bedding planes; friable; common fine roots and pores; few fine dark concretions (iron and manganese oxides); moderately acid; clear wavy boundary. (14 to 40 inches thick)
2Btb--37 to 52 inches; grayish brown (2.5Y 5/2) loam; common fine distinct strong brown (7.5YR 5/6) mottles; moderate fine subangular blocky structure; firm; common fine roots and pores; common fine dark concretions (iron and manganese); common brown (10YR 4/3) patchy clay films and flows along pores and vertical faces of peds; vertical cracks 5 to 15 mm wide, and are 6 to 18 inches apart filled with grayish brown (10YR 5/2) fine sandy loam; very strongly acid; gradual wavy boundary. (8 to 30 inches thick)
2C2--52 to 57 inches; dark yellowish brown (10YR 4/4) sandy loam; common coarse distinct grayish brown (10YR 5/2) and dark brown (10YR 3/3) mottles; massive; very friable; few fine pores; strongly acid; clear wavy boundary. (0 to 20 inches thick)
2C3--57 to 64 inches; grayish brown (2.5Y 5/2) very fine sandy loam; common medium distinct dark yellowish brown (10YR 4/4) mottles; massive; very friable; common mica flakes; moderately acid; clear wavy boundary. (0 to 10 inches thick)
3C4--64 to 71 inches; dark yellowish brown (10YR 4/4) sand; few coarse distinct pale brown (10YR 6/3) mottles; single grained, loose; slightly acid.
TYPE LOCATION: New Madrid County, Missouri, about 2 miles northeast of the town of Canalou, 600 feet west and 1,260 feet north of the southeast corner of sec. 28, T. 25 N., R. 13 E.
RANGE IN CHARACTERISTICS: Thickness of the A and C horizons and the depth to the 2Btb horizon ranges from 24 to about 60 inches and commonly is deeper than 30 inches.
The A horizon has hue of 10YR, value of 3, 4, or 5.5 or higher dry, and chroma of 2 or 3. It is fine sandy loam or sandy loam. Reaction is moderately acid to neutral.
The C1 horizon has hue of 10YR or 2.5Y, value of 4 through 6, and chroma of 2. Mottles have hue of 10YR or 7.5YR, value of 3 through 6, and chroma of 3 through 8. It commonly is fine sandy loam, sandy loam, or loam, but a layer of loamy sand up to 15 inches thick is included within the range. Some pedons have thin strata or lenses of sandy clay loam or loamy sand. Reaction is moderately acid to neutral.
The 2Btb horizon has hue of 10YR, 2.5Y, or 5Y, value of 4, 5, or 6, and chroma of 1 or 2. Mottles mainly have hue of 10YR or 7.5YR, value of 4 or 5, and chroma of 3 through 8. It is loam, silt loam, sandy loam, or sandy clay loam. Reaction ranges from very strongly acid through neutral.
The 2C and 3C horizons have hue of 10YR or 2.5Y, value of 4 to 6, and chroma of 2 to 4. Thickness and sequence of the lower 2C horizon and 3C horizon are variable and commonly are sandy loam, very fine sandy loam, fine sandy loam, loamy fine sand, loamy sand, fine sand, or sand. Reaction is strongly acid through neutral.
COMPETING SERIES: This is the
Enoree series in the same family and the
Caruthersville,
Commerce,
Convent,
Falaya,
Iuka,
Nahatche,
Vacherie, and
Wakeland series in similar families. Enoree soils are wetter, more stratified, flood more frequently, and lack Btb horizons. Caruthersville, Commerce, Convent, Falaya, and Vacherie soils have less than 15 percent of fine sand or coarser. Caruthersville soils are also calcareous, and Vacherie soils are coarse-silty over clayey. Iuka soils are siliceous and acid. Nahatche soils are fine-loamy, and Wakeland soils are coarse-silty and mesic.
GEOGRAPHIC SETTING: Lilbourn soils are on nearly level to depressional terraces or natural levees of the Mississippi River Valley. Slope gradients are 0 to 1 percent. These soils formed in loamy alluvium of recent deposition over buried alluvium of what appears to be of an older age or period of deposition and a possible period of brief exposure to weathering. Lilbourn soils seem to be closely associated geographically with "sunken lands" reportedly depressed at the time of the New Madrid earthquake of 1811-1812. Mean annual precipitation ranges from 45 to 55 inches, and the mean annual temperature ranges from 59 to 65 degrees F.
GEOGRAPHICALLY ASSOCIATED SOILS: These include
Canalou,
Clana,
Crevasse,
Dundee,
Farrenburg,
Malden,
Scotco, and
Wardell soils on the same landscape and
Gideon and
Sikeston soils on slightly lower elevations. Dundee soils have less than 20 inches of surface soil over a silty clay loam Bt horizon. Canalou, Clana, Crevasse, Malden, and Scotco soils contain more sand and less clay to a depth of 5 feet. Farrenburg soils lack mottles with chroma of 2 or less in the upper 20 inches. Wardell soils have argillic horizons within 20 inches of the surface and are dominated by chroma of 1. Gideon and Sikeston soils are wetter, are dominated by chroma of 1, and generally contain more clay throughout the solum.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained. Runoff is low. Permeability is moderate. The C horizon is saturated with water for a significant period of time during each year.
USE AND VEGETATION: These soils are cleared and cropped to row crops and small grains. Native vegetation was mixed hardwoods, mostly red oak and ash.
DISTRIBUTION AND EXTENT: The Mississippi River Valley (MLRA 131) of southeastern Missouri and Kentucky. They are of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: AUBURN, ALABAMA
SERIES ESTABLISHED: New Madrid County, Missouri, 1974.
REMARKS: This soil was a major component of the "Dogwood Series" as published in the 1921 Soil Survey Report of Mississippi County, Missouri. The Dogwood series also included what is now the Wardell series. The Dogwood series has been inactive for many years.
National Cooperative Soil Survey
U.S.A.