LOCATION TIEVILLE                IA+NE

Established Series
Rev. BCJ-RAL-RJB
03/2020

TIEVILLE SERIES

The Tieville series consists of very deep, poorly drained soils on flood plains. These soils formed in calcareous clayey alluvium. Slopes range from 0 to 2 percent. Mean annual precipitation is about 29 inches. Mean annual air temperature is about 49 degrees F.

TAXONOMIC CLASS: Fine, smectitic, calcareous, mesic Vertic Endoaquolls

TYPICAL PEDON: Tieville silty clay, in a cultivated field, on a flood plain, at an elevation of 1,055 feet above sea level. (Colors are for moist soil unless otherwise noted.)

Ap--0 to 7 inches; black (10YR 2/1) silty clay, dark gray (10YR 4/1) dry; weak fine subangular blocky structure; firm; few fine roots; slightly effervescent; slightly alkaline; abrupt smooth boundary.

Ak--7 to 22 inches; black (10YR 2/1) silty clay, dark gray (10YR 4/1) dry; moderate medium subangular blocky structure; firm; few very fine and fine roots between peds; few fine irregular masses of carbonate; strongly effervescent; slightly alkaline; clear smooth boundary. (Combined thickness of the A horizon is 18 to 24 inches.)

Bkg1--22 to 30 inches; dark gray (10YR 4/1) and very dark gray (10YR 3/1) silty clay; moderate medium subangular blocky structure; firm; few fine irregular masses of carbonate; strongly effervescent; slightly alkaline; clear smooth boundary.

Bkg2--30 to 38 inches; dark gray (10YR 4/1) silty clay; moderate medium subangular blocky structure; firm; few fine irregular masses of carbonate and few fine and medium rounded carbonate concretions; common fine prominent brown (7.5YR 4/4) redoximorphic concentrations; violently effervescent; moderately alkaline; clear smooth boundary. (Combined thickness of the Bkg horizon is 12 to 36 inches thick.)

BCkg--38 to 43 inches; gray (10YR 5/1) silty clay; weak coarse prismatic structure; firm; few fine irregular carbonate concretions; common medium and coarse prominent yellowish brown (10YR 5/6) redoximorphic concentrations; strongly effervescent; moderately alkaline; clear smooth boundary. (0 to 6 inches thick)

Cg--43 to 60 inches; gray (10YR 5/1) silty clay; massive; firm; few fine irregular carbonate concretions; common medium and coarse prominent yellowish brown (10YR 5/6) redoximorphic concentrations; strongly effervescent; moderately alkaline.

TYPE LOCATION: Monona County, Iowa; about 2,500 feet north and 300 feet west of southeast corner of sec. 15, T.85 N., R.45 W.; USGS Hornick quadrangle; lat. 42 degrees 10 minutes 38 seconds N. and long. 96 degrees 3 minutes 36.1 seconds W., NAD 83

RANGE IN CHARACTERISTICS:
Depth to carbonates--0 to 10 inches
Thickness of the mollic epipedon--18 to 24 inches
Content of clay in the particle-size control section (weighted average)--40 to 60 percent
Content of sand in the particle-size control section (weighted average)--less than 10 percent fine sand and sand coarser than fine sand
Rock fragment content--0 percent
Electrical conductivity--0 dS/m

Ap, A, or Ak horizons:
Hue--10YR or 2.5Y
Value--2 or 3
Chroma--1 or 2
Texture--silty clay or clay
Clay content--40 to 60 percent
Sand content--1 to 10 percent
Calcium carbonate equivalent--1 to 5 percent
Reaction--slightly alkaline or moderately alkaline

Bg or Bkg horizons:
Hue--10YR, 2.5Y, or 5Y
Value--2 to 4
Chroma--1 or 2
Texture--silty clay or clay
Clay content--40 to 70 percent
Sand content--1 to 10 percent
Calcium carbonate equivalent--10 to 30 percent
Reaction--slightly alkaline to strongly alkaline

BCg or BCkg horizons:
Hue--10YR, 2.5Y, or 5Y
Value--3 to 5
Chroma--1 or 2
Texture--silty clay or clay
Clay content--50 to 70 percent
Sand content--1 to 10 percent
Calcium carbonate equivalent--1 to 10 percent
Reaction--moderately alkaline or strongly alkaline

Cg horizon:
Hue--10YR or 2.5Y
Value--3 to 5
Chroma--1 or 2
Texture--silty clay or clay
Clay content--50 to 70 percent
Sand content--1 to 5 percent
Calcium carbonate equivalent--1 to 10 percent
Reaction--moderately alkaline or strongly alkaline

Some pedons have a few gypsum crystals in the lower part of the series control section

COMPETING SERIES: These are the Belmann, Brownton, Egas, Erd, Herdcamp, Knoke, and Nishna series.
Belmann--have a sand content of 15 to 45 percent in the upper third of the series control section
Brownton--have a rock fragment content of 2 to 8 percent in the lower half of the series control section
Egas--have an electrical conductivity range of 8 to more than 50 dS/m in the series control section
Erd--are in areas that have an annual precipitation range of 18 to 23 inches and have an electrical conductivity range of 8 to 16 dS/m in the middle third of the series control section
Herdcamp--do not have a cambic horizon and have an electrical conductivity range of 2 to 8 dS/m in the lower two thirds of the series control section
Knoke--have a clay content of 35 to 40 percent and a sand content of 15 to 30 percent in the particle-size control section
Nishna--have a mollic epipedon 24 to 60 inches thick

GEOGRAPHIC SETTING:
Parent material--calcareous clayey alluvium
Landform--flood plains
Slopes--0 to 2 percent
Elevation--700 to 1,200 feet above sea level
Mean annual air temperature--47 to 52 degrees F.
Mean annual precipitation--26 to 32 inches
Frost-free period--145 to 175 days

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Blencoe, Luton, Napa, and Woodbury soils.
Blencoe--are in the slightly higher elevations, have a clay content of 18 to 24 percent in the lower third of the particle-size control section, and have a saturated zone between depths of 1 to 3 feet during April to June in most years
Luton--are in landform positions similar to those of the Tieville soils, have carbonates between depths of 15 to 36 inches, and have a saturated zone within a depth of 1 foot during March to June in most years
Napa--are in the slightly lower elevations, have nests of gypsum and other salts within a depth of 16 inches, and have a sodium adsorption ratio of 13 in the particle-size control section
Woodbury--are in the slightly higher elevations, have a saturated zone within a depth of 1 foot, have carbonates between depths of 36 to 60 inches, and have a clay content of 20 to 35 percent in the lower third of the series control section

DRAINAGE AND PERMEABILITY:
Drainage class--poorly drained--a saturated zone occurs within a depth of 1 foot during March to June in most years and is considered apparent
Permeability--very slow
Surface runoff potential--low or negligible
Flooding--rare flooding for brief to long periods during the months of February to November from precipitation events and snowmelt

USE AND VEGETATION:
Most areas have been drained by surface ditches and are cultivated. The principal crops are corn, soybeans, and small grains. Some areas are in native range. See Additional Data for native vegetative cover in Iowa and Nebraska.

DISTRIBUTION AND EXTENT:
LRR M, MLRAs 102B and 107; LRR H, MLRAs 75 and 76; Iowa and Nebraska. This series is of large extent.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Indianapolis, Indiana

SERIES ESTABLISHED: Monona County, Iowa, 1995.

REMARKS:
Particle-size control section--the zone from a depth of 10 to 40 inches (Ak, Bkg1, Bkg2, and BCkg horizons);
series control section--the zone from the surface to a depth of 60 inches (Ak, Bkg1, Bkg2, BCkg, and Cg horizons).

Diagnostic horizons and features recognized in this pedon:
mollic epipedon--the zone from the surface to a depth of 22 inches. (Ap and Ak horizons);
cambic horizon--the zone from a depth of 22 to 38 inches (Bkg1 and Bkg2 horizons);
Redoximorphic concentrations--in the zone from a depth of 30 to 60 inches (Bg2, BCg, and Cg horizons);
aquic moisture regime.

Taxonomy version--second edition, 1999.

ADDITIONAL DATA:
In Iowa, the native vegetative cover is an herbaceous wetland community commonly inhabited with Prairie Cordgrasses, Big Bluestems, Switchgrasses, Grays Sedges, Fox Sedges, Tall Tickseeds, and Great St. John Worts. Source: Iowa State Office, Natural Resources Conservation Service, Des Moines, IA.

In Nebraska, the native vegetative cover is an herbaceous wetland community commonly inhabited with sedges (Carex emoryi, C. laeviconica, C. pellita, C. vulpinoidea), flat stem spikerush, (Eleocharis compressa), Kentucky bluegrass (Poa Pratensis), prairie cordgrass (Spartina pectinate). Source: Terrestrial Ecological Systems and Natural Communities of Nebraska, Version IV. S.B. Rolfsmeier and G. Steinauer. Nebraska Natural Heritage Program, Nebraska Game and Parks Commission, 2010.

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National Cooperative Soil Survey
U.S.A.