LOCATION HOFFLAND NE+SDEstablished Series
TAXONOMIC CLASS: Sandy, mixed, mesic Mollic Endoaquepts
TYPICAL PEDON: Hoffland fine sandy loam on a swale in native grass with less than 1 percent slope from a map unit of Wildhorse-Hoffland complex, 0 to 3 percent slopes. When described, the soil was moist throughout. (Colors are for wet soil unless otherwise stated.)
Ak1--0 to 10 centimeters (1 to 4 inches); very dark grayish brown (10YR 3/2) fine sandy loam, gray (10YR 5/1) dry; weak fine granular structure; very friable, soft; common very fine and fine roots; violent effervescence; finely disseminated carbonate throughout; 23 percent calcium carbonate equivalent; moderately alkaline; clear smooth boundary.
Ak2--10 to 18 centimeters (4 to 7 inches); very dark grayish brown (10YR 3/2) fine sandy loam, gray (10YR 6/1) dry; weak medium subangular blocky structure parting to weak fine granular; friable, soft; common fine and very fine roots; violent effervescence; finely disseminated carbonate throughout; 33 percent calcium carbonate equivalent; moderately alkaline; clear smooth boundary. [Combined thickness of the Ak horizon is 15 to 23 centimeters (6 to 9 inches) thick]
ACk1--18 to 23 centimeters (7 to 9 inches); grayish brown (10YR 5/2) fine sandy loam, light brownish gray (10YR 6/2) dry; weak medium subangular blocky structure; very friable, soft; few very fine roots; violent effervescence; finely disseminated carbonate throughout; 12 percent calcium carbonate equivalent; moderately alkaline; clear smooth boundary.
ACk2--23 to 28 centimeters (9 to 11 inches); dark grayish brown (10YR 4/2) fine sandy loam, gray (10YR 6/1) dry; weak medium subangular blocky structure; friable, slightly hard; few very fine roots; violent effervescence; finely disseminated carbonate throughout; 18 percent calcium carbonate equivalent; moderately alkaline; clear smooth boundary. [Combined thickness of the ACk horizon is 0 to 41 centimeters (0 to 16 inches) thick]
Cg1--28 to 79 centimeters (11 to 31 inches); grayish brown (10YR 5/2) fine sand, light brownish gray (10YR 6/2) dry; common medium distinct dark yellowish brown (10YR 4/4) moist iron masses in the matrix; single grain; loose; moderately alkaline; clear wavy boundary.
Cg2--79 to 104 centimeters (31 to 41 inches) dark grayish brown (2.5Y 4/2) fine sand, light brownish gray (2.5Y 6/2) dry; common medium distinct yellowish brown (10YR 5/4) moist iron masses in the matrix; single grain; loose; slightly alkaline; clear wavy boundary.
Cg3--104 to 200 centimeters (41 to 79 inches); light brownish gray (10YR 6/2) fine sand, light gray (10YR 7/1) dry; single grain; loose; moderately alkaline; stratified with very dark grayish brown (2.5Y 3/2) fine sandy loam, dark grayish brown (2.5Y 4/2) dry. [Combined thickness of Cg horizons 100 to 175 centimeters ( 40 to 70 inches)]
TYPE LOCATION: Sheridan County, Nebraska; about 3.2 kilometers (2 miles) north of Lakeside; 579 meters (1,900 feet) west and 137 meters (450 feet) north of the southeast corner of sec. 3, T. 24 N., R. 44 W. Lakeside topographic quadrangle, lat. 42 degrees, 5 minutes N, long. 102 degrees, 24 minutes, 15 seconds W.
RANGE IN CHARACTERISTICS:
Moisture regime: aquic
Depth to redoximorphic features: 0 to 46 centimeters (0 to 18 inches)
Endosaturation depth: 0 to 46 centimeters (0 to 18 inches)
Carbonates: 0 to 64 centimeters (0 to 25 inches)
Calcium carbonate equivalent (by weight):15 to 40 percent, 5 percent or more in textures with less than 18 percent clay
Particle-size control section (weighted average):
Sand content, 78 to 96 percent
Clay content: 1 to 17 percent
Ak horizon:
Hue: 10YR or 2.5Y
Value: 4 to 6, 2 or 3 moist
Chroma: 1 or 2
Texture: clay loam, sandy clay loam, fine sandy loam, loam, sandy loam, loamy fine sand, loamy sand, fine sand, mucky loam, mucky fine sandy loam
Some pedons have thin horizons [3 to 8 centimeters (1 to 3 inches) thick] of mucky peat or peat.
Reaction: slightly alkaline or moderately alkaline
ACk horizon:
Hue: 10YR or 2.5Y
Value: 4 to 7, 4 to 5 moist
Chroma: 1 or 2
Texture: fine sandy loam, loam, sandy loam, loamy fine sand, loamy sand, fine sand, sand
Reaction: slightly alkaline or moderately alkaline
Cg horizon:
Hue: 10YR to 5Y
Value: 4 to 8, 2 to 6 moist
Chroma: 1 to 3
Texture: fine sand, sand, loamy fine sand, loamy sand
Reaction ranges: neutral to moderately alkaline
Some pedons have thin buried eolian layers of darker colored and or finer textured material at depths of 38 to 200 centimeters (15 to 79 inches).
COMPETING SERIES: There are no other series in the same family.
GEOGRAPHIC SETTING:
Parent material: sandy eolian deposits
Landscape: sandhills
Landform: swales on interdunes
Slopes: 0 to 1 percent
Elevation: 762 to 1189 meters (2500 to 3900 feet)
Mean annual air temperature: 8 to 10 degrees C. (46 to 49 degrees F.)
Mean annual precipitation: 41 to 53 centimeters (16 to 21 inches)
Frost Free Days: 120 to 140
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Crowther,
Els,
Ipage,
Marlake,
Valentine, and
Wildhorse soils.
Crowther soils are on similar swales on interdunes, are coarse loamy over sandy or sandy skeletal in the control section, and have mollic epipedons.
Els soils are slightly higher on swales on interdunes and are somewhat poorly drained having a seasonal zone of saturation or aquic conditions beginning at 46 centimeters (18 inches).
Ipage soils are higher on hummocks on interdunes and are moderately well drained having a seasonal zone of saturation or aquic conditions beginning at 91 centimeters (36 inches).
Marlake soils are in depressions on interdunes and are very poorly drained having a seasonal zone of saturation or aquic conditions beginning at the surface and having ponding up to 61 centimeters (24 inches).
Valentine soils are on higher hummocks and dunes and are excessively drained having no seasonal zone of saturation or aquic conditions.
Wildhorse soils are slightly higher on swales on interdunes, are somewhat poorly drained having a seasonal zone of saturation or aquic conditions beginning at 46 centimeters (18 inches), and have a sodium adsorption ration greater than 13 in half or more of the upper 51 centimeters (20 inches)
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage: poorly drained and very poorly drained
Runoff: negligible
Saturated Hydraulic Conductivity: high
Ponding frequency: frequent on the very poorly drained soil
Ponding duration: long on the very poorly drained soil with a depth of up to15 centimeters (6 inches)
USE AND VEGETATION: The major use is livestock grazing and haying. The rangeland native plant community for the wet subirrigated ecological site (RO65XY023NE) is mostly big bluestem, prairie cordgrass, switchgrass, yellow indiangrass and tall dropseed; for the wetland ecological site (R065XY022NE) it is mostly prairie cordgrass, northern reedgrass, bluejoint reedgrass, slender wheatgrass, sedges, and rushes.
DISTRIBUTION AND EXTENT: In the western sandhills of Nebraska and sandhills of southwestern South Dakota (MLRA 65, LRR G). The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Denver, Colorado
SERIES ESTABLISHED: Morrill County, Nebraska, October 1981.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Calcic horizon: 0 to 28 centimeters (0 to 11 inches) (the Ak1, Ak2, ACk1, and ACk2 horizons)
Aquic soil conditions: 28 to 200 centimeters (11 to 79 inches) (the Cg1 and Cg2 horizons).
LRM in 10/2005: metric conversion and changed permeability to saturated hydraulic conductivity.
RRH in 3/2007: Introductory paragraph: revised. Typical pedon: revised to reflect actual pedon sampled for SSL. RIC's: revised including - Ak: Textures: added loamy fine sand, mucky loam, mucky fine sandy loam, mucky loamy fine sand, Reaction: slightly alkaline or moderately alkaline. ACk: Reaction: slightly alkaline or moderately alkaline. Cg: Color: added 5Y. Competing Series: revised because of change in classification; Geographic Setting through Distribution and Extent: revised. Geographically Associated Soils: Deleted Loup and Tryon and added Ipage and Valentine. Additional Data: revised
RRH in 3/2009: Introductory paragraph and Geographic Setting: Changed slope range to 0 to 1 percent. Range of Characteristics: Ak horizon: Added clay loam and sandy clay loam based on SSL data and deleted sand and mucky loamy fine sand.
ADDITIONAL DATA: Data is available from the National Soil Survey Center, Soil Survey Laboratory for Pedon IDs 80NE161006, 80NE161007, 80NE161011, and 06NE117023. Pedon ID 80NE161011 represents the Typical Pedon and is in NASIS.