Established Series


The Tryon series consists of very deep, poorly and very poorly drained soils formed in eolian and alluvial sediments in sandhill interdunes and on stream terraces. Slopes range from 0 to 2 percent. The mean annual precipitation is about 53 centimeters (21 inches), and the mean annual air temperature is about 10 degrees C. (49 degrees F.) at the type location.

TAXONOMIC CLASS: Mixed, mesic Typic Psammaquents

TYPICAL PEDON: Tryon loamy fine sand with a slope of less than 1 percent in a native meadow that has been overseeded with legumes. (Colors are for dry soil unless otherwise stated.)

A--0 to 15 centimeters (0 to 6 inches); dark gray (10YR 4/1) loamy fine sand, black (10YR 2/1) moist; common fine distinct dark yellowish brown (10YR 4/4) moist and dark yellowish brown (10YR 4/6) moist iron masses in the matrix; weak fine granular structure; soft, friable; many very fine and fine roots throughout; moderately acid; clear wavy boundary.

Cg1--15 to 30 centimeters (6 to 12 inches); light brownish gray (10YR 6/2) loamy fine sand, grayish brown (10YR 5/2) moist; many fine faint yellowish brown (10YR 5/4) moist and many fine and medium prominent strong brown (7.5YR 5/6) moist iron masses in the matrix; single grain; loose; common very fine and fine roots throughout; moderately acid; gradual wavy boundary.

Cg2--30 to 203 centimeters (12 to 80 inches); light gray (2.5Y 7/2) fine sand, light brownish gray (2.5Y 6/2) moist; many fine and medium prominent strong brown(7.5YR 5/6) moist iron masses in the matrix; single grain; loose; few very fine roots throughout; moderately acid.

TYPE LOCATION: Cherry County, Nebraska; about 22 kilometers (14 miles) northwest of Brownlee; 488 meters (1600 feet) east and 183 meters (600 feet) south of the northwest corner, sec. 33, T. 29 N., R. 30 W. USGS Bull Lake topographic quadrangle; latitude 42 degrees, 27 minutes, 3 seconds North and longitude 100 degrees 50 minutes, 48 seconds West

Soil Moisture: generally saturated to or near the surface during growing season
Moisture regime: aquic
Depth to carbonates: typically lack carbonates, however, some pedons contain carbonates in the surface layer

A horizon:
Hue: 10YR
Value: 3 to 5, 2 to 4 moist (See Remarks - Surface thickness)RRZ
Chroma: 1 or 2
Texture: loamy fine sand with the range including fine sand, sand, loamy sand and fine sandy loam
Reaction: moderately acid to moderately alkaline
Comment: A decomposed layer of organic matter 3 to 10 centimeters (1 to 4 inches) thick maybe present on the surface

AC horizon: (if present)
Hue: 2.5Y or 10YR
Value: 5 to 7, 3 to 5 moist
Chroma: 1 or 2
Texture: fine sand, sand, loamy sand, loamy fine sand or fine sandy loam Reaction: moderately acid to slightly alkaline

C horizon:
Hue: 5Y to 10YR
Value: 5 to 8, 4 to 7 moist
Chroma: 1 to 3
Texture: Fine sand, sand, loamy sand, or loamy fine sand
Reaction: Moderately acid to slightly alkaline
Comments: Some pedons have thin layers of fine textured and darker colored material in the C horizon below a depth of 40 inches

COMPETING SERIES: These are the Arloval, Barren(T), Carrolls, Conrad, Dair(T), Forbar, Gothenburg, Jamaica, Junius, Norway, Stafford, Tihonet, Tyre, and Wanser soils.
Arloval soils have a thicker A horizon and are in a drier climate.
Barren(T) and Jamaica(T) soils are anthrotransported materials.
Carroll soils have volcanic ash in the particle size control section.
Conrad soils formed in stratified light and dark colored sands.
Dair(T) soils are formed in a wetter climate.
Forbar soils formed in sediments derived from volcanic ash and tuff.
Gothenburg soils are very shallow over gravelly sand.
Norway soils are stratified and calcareous throughout the series control section.
Stafford soils are more acid and are in a climate of higher precipitation.
Heceta soils have a much higher mean annual precipitation and a longer frost-free period each year.
Junius soils have a B horizon.
Tyre soils are moderately deep over sandstone bedrock.
Wanser soils are in a drier climate and are generally more alkaline.

Landform: in sandhill interdunes and on stream terraces
Slope: 0 to 2 percent
Parent material: eolian and alluvial sediments
Mean annual temperature: 8 to 12 degrees C. (47 to 51 degrees F.)
Mean annual precipitation: 36 to 61 centimeters (14 to 24 inches)

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Els, Elsmere, Gannett, Ipage, Marlake, Loup, and Ord soils. Els and Elsmere soils are higher on the landscape and have a water table at 1.5 to 3.0 feet. Elsmere, Gannett, and Loup soils have a mollic epipedon. Gannett soils are coarse-loamy. Gannett and Loup soils are on similar landscapes. Ipage soils have a seasonal high water table at depths of more than 3 feet. Marlake soils have a higher seasonal water table that is above the surface much of the year and occur on the lowest part of the landscape. Ord soils have a seasonal high water table at depths of 1.5 to 3.0 feet and are coarse-loamy and are higher on the landscape.

Drainage: Poorly drained and very poorly drained
Runoff: very low to ponded
Saturated hydraulic conductivity: very high.
Depth of seasonal high water table: 0 to 46 centimeters (0 to 1.5 feet) poorly drained phase) and +15 to 30 centimeters (+.5 to 1 foot) (very poorly drained phase)

USE AND VEGETATION: Most of the acres are in native grass.
It is used for hayland or range.
The native grasses on the poorly drained phase include big bluestem, indiangrass, prairie cordgrass and switchgrass.
The native grasses on the very poorly drained phase include prairie cordgrass, reedgrass, sedges and rushes.

DISTRIBUTION AND EXTENT: In the sandhills area of Nebraska. The series is of moderate extent.


SERIES ESTABLISHED: Howard County, Nebraska, 1968.

REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon: 0 to 15 centimeters (0 to 6 inches) (A horizon)
Aquic soil conditions: saturation and redox features below 15 centimeters (6 inches)
This series represents nonmollic soils formerly mapped as Loup.

OSD Modification
RRZ 7/2002; A silty substratum phase is recognized; textures below 102 centimeters (40 inches) silt loam to silty clay loam.
SUGGESTED CHANGE OF TAXONOMY (Mixed, mesic Mollic Psammaquents): many of the Tryon soils in Hall County have dark colors greater than 15 centimeters (6 inches), but do not meet the 25 centimeters (10 inch) thickness for the Loup Series. Review of data indicated that Tryon soil area generally are considered to have dark color surface layers less that 25 centimeters (10 inches)

ADDITIONAL DATA: Pedon S91NE-031-022 sampled for the National Soil Survey Laboratory at the following site:

Modified format by LRM in 1/2006 to include metric conversion and change permeability to saturated hydraulic conductivity.

National Cooperative Soil Survey