LOCATION NASH OK+KSEstablished Series
TAXONOMIC CLASS: Coarse-silty, mixed, superactive, thermic Udic Haplustolls
TYPICAL PEDON: Nash silt loam.
(Colors are for dry soil unless otherwise stated.)
Ap--0 to 6 inches; reddish brown (5YR 5/3) silt loam, dark reddish brown (5YR 3/3) moist; weak fine granular structure; slightly hard, friable; common fine roots; slightly acid; clear smooth boundary. (0 to 8 inches thick)
A1--6 to 10 inches; reddish brown (5YR 4/3) silt loam, dark reddish brown (5YR 3/3) moist; moderate fine granular structure; slightly hard, friable; common fine roots; slightly acid; gradual smooth boundary. (4 to 15 inches thick)
Bw--10 to 22 inches; yellowish red (5YR 5/6) silt loam, yellowish red (5YR 4/6) moist; weak coarse prismatic structure parting to moderate fine granular structure; slightly hard, friable; few fine roots; neutral; gradual smooth boundary. (10 to 25 inches thick)
BC--22 to 30 inches; red (2.5YR 5/6) silt loam, red (2.5YR 4/6) moist; weak coarse prismatic structure; slightly hard, friable; few fine roots; about 5 percent by volume of coarse sandstone fragments less than 3 inches in diameter; slightly alkaline; clear smooth boundary. (0 to 12 inches thick)
Cr--30 to 40 inches; red (2.5YR 5/6) weakly consolidated, calcareous sandstone, red (2.5YR 4/6) moist.
TYPE LOCATION: Garfield County, Oklahoma; about 1 mile south and 3 1/2 miles east of Hillsdale; 1,000 feet east and 500 feet south of the northwest corner of sec. 23, T. 24 N., R. 7 W.
RANGE IN CHARACTERISTICS: Solum thickness and depth to bedrock ranges from 20 to 40 inches. The soil is slightly acid to moderately alkaline in all horizons.
The Ap or A horizon has hue of 5YR or 7.5YR, value of 4 or 5, and chroma of 2 or 3. Texture is silt loam, loam, very fine sandy loam, or fine sandy loam.
The Bw horizon has hue of 2.5YR or 7.5YR, value of 4 or 5, and chroma of 3 to 6. Texture is the same as the A horizon.
The BC horizon has hue of 2.5YR or 5YR, value of 4 to 6, and chroma of 6 or 8. Texture is the same as the A horizon.
The Cr horizon is weakly consolidated reddish sandstone.
Reaction is slightly or moderately alkaline and calcareous or noncalcareous.
COMPETING SERIES: These are Minco series in the same family and soils in similar families are Amber, Apalo, Canadian, Crisfield, Enterprise, Gotebo, Keokuk, Loco, Lucien, Lugert, Nashville, Reinach, and Woodward series. Minco soils are more than 40 inches thick to bedrock. Amber and Apalo soils lack a mollic epipedon and have a solum more than 40 inches thick. Canadian and Crisfield soils have a coarse-loamy control section and are more than 40 inches to bedrock. Enterprise, Gotebo, and Woodward soils lack a mollic epipedon and have secondary carbonates within 36 inches of the soils surface. Keokuk and Lugert soils have an irregular distribution of organic matter and are more than 40 inches to bedrock. Loco and Lucien soils have a solum less than 20 inches thick. Nashville soils have a fine-silty control section. Reinach soils have a mollic epipedon more than 20 inches thick and are more than 40 inches thick to bedrock.
GEOGRAPHIC SETTING: Nash soils are nearly level to moderately steep soils on convex ridges and side slopes of uplands in the Central Rolling Red Prairies. Slopes are 0 to 20 percent. They formed in material weathered from sandstone of Permian age. Mean annual precipitation ranges from 28 to 40 inches. Mean annual temperature ranges from 57 to 65 degrees F. Thornthwaite annual P-E indices range from 44 to 64.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the competing Lucien soils and Chickasha, Grant, Pond Creek, Quinlan, and Zaneis soils. Chickasha, Grant, Pond Creek, and Zaneis soils have argillic horizons and usually occur on broad ridges on flats. In addition, Chickasha and Zaneis soils have a fine-loamy control section, and Grant and Pond Creek soils have a fine-silty control section. Lucien soils usually occur on slightly higher convex ridges. Quinlan soils have a solum less than 20 inches thick and usually occur on slightly higher convex ridges.
DRAINAGE AND PERMEABILITY: Well drained; runoff is slow to rapid; and permeability is moderate.
USE AND VEGETATION: Mainly cultivated to small grains, grain sorghum or tame pasture. Some areas are used for rangeland. Native vegetation is mainly mid and tall grass prairie.
DISTRIBUTION AND EXTENT: Central Rolling Red Prairies of Oklahoma, Kansas, and Texas. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Temple, Texas
SERIES ESTABLISHED: Garfield County, Oklahoma; 1935.