LOCATION HAYFORD COEstablished Series
TAXONOMIC CLASS: Clayey over sandy or sandy-skeletal, smectitic, mesic Aquic Argiustolls
TYPICAL PEDON: Hayford silty clay loam - cropland. (Colors are for dry soils unless otherwise noted.)
Ap--0 to 7 inches; dark gray (10YR 4/1) silty clay loam, very dark brown (10YR 2/2) moist; weak medium granular structure; soft, friable; slightly sticky, slightly plastic; slightly effervescent; moderately alkaline; abrupt smooth boundary. (6 to 10 inches thick)
B21t--7 to 10 inches; dark gray (10YR 4/1) silty clay loam, very dark brown (10YR 2/2) moist; moderate medium prismatic structure that parts to moderate medium subangular blocks; hard, firm, sticky, plastic; thin continuous clay films on peds; slightly effervescent; moderately alkaline; clear smooth boundary. (2 to 8 inches thick)
B22t--10 to 19 inches; gray (10YR 5/1) silty clay, very dark brown (10YR 2/2) moist; strong medium prismatic structure that parts to strong medium blocks; hard, friable, sticky, plastic; thin continuous clay films on peds; strongly effervescent; moderately alkaline; clear smooth boundary. (5 to 14 inches thick)
B3ca--19 to 22 inches; gray (10YR 6/1) silty clay loam, grayish brown (10YR 5/2) moist; moderate medium prismatic structure that parts to moderate medium blocks; very hard, firm, sticky, plastic; thin patchy clay films on some peds; visible secondary calcium carbonate occurring as nodules and as thin seams and streaks; violently effervescent; strongly alkaline; clear smooth boundary. (2 to 8 inches thick)
C1ca--22 to 26 inches; light gray (2.5Y 7/2) clay loam, light brownish gray (2.5Y 6/2) moist; common medium and distinct mottles of dark yellowish brown (10YR 3/4) moist; massive; very hard, firm, slightly sticky, slightly plastic; visible secondary calcium carbonate occurring as nodules and in thin seams and streaks; violently effervescent; strongly alkaline; clear smooth boundary. (2 to 12 inches thick)
IIC2g--26 to 32 inches; light brownish gray (2.5Y 6/2) fine sandy loam, light olive brown (2.5Y 5/4) moist; many coarse prominent mottles of olive yellow (2.5Y 6/6) moist; massive; very hard, firm; violently effervescent; moderately alkaline; gradual smooth boundary. (4 to 12 inches thick)
IIIC3g--32 to 60 inches; light gray (2.5Y 7/2) very gravelly sand, light brownish gray (2.5Y 6/2) moist; many coarse prominent mottles of olive brown (2.5Y 4/4) moist; single grained; loose; slightly effervescent; moderately alkaline (Several feet thick).
TYPE LOCATION: Logan County, Colorado; 1,350 feet north and 820 feet east of the center of Sec. 2, T. 8 N., R. 52 W.
RANGE IN CHARACTERISTICS: Mean annual soil temperature is about 50 degrees F. Thickness of the mollic epipedon ranges from 7 to 20 inches, depth to calcareous material ranges from 0 to 6 inches, thickness of the solum ranges from 16 to 36 inches, and depth to the IIC horizon ranges from 20 to 36 inches. Organic carbon ranges from .8 to 2 percent in the mollic epipedon and decreases uniformly as depth increases. Cation exchange capacity ranges from approximately 70 to 90 milliequivalents per 100 grams of clay. The Ap horizon has hue of 2.5Y or 10YR, value of 4 or 5 dry, 2 or 3 moist, and chroma of 1 through 3. Usually it has granular structure but it has weak subangular blocky structure in some pedons. This horizon is soft or slightly hard. It is mildly or moderately alkaline. The B2t horizon has hue of 2.5Y or 10YR, value of 5 or 6 dry, 2 through 4 moist, and chromas of 1 or 2. It has 35 to 55 percent sand. This horizon has moderate or strong prismatic or blocky structure. It is moderately or strongly alkaline. The Cca horizon has hue of 2.5Y or 10YR and has common to many mottles. It is moderately or strongly alkaline and has 4 to 10 percent calcium carbonate equivalent. Contrasting C horizons, which are mottled, occur at depth of 20 to 36 inches. They range from loamy sand to very gravelly sand.
COMPETING SERIES: These are the Nibley and Rusco series. Nibley soils have a fine textured control section. Rusco soils have a fine-silty control section.
GEOGRAPHIC SETTING: The Hayford soils are on terraces or upland flats and have slope gradient of 0 to about 5 percent. The soils formed in alluvial sediments. At the type location the average annual precipitation is about 15 inches, with peak periods of precipitation during the spring and summer. Mean annual temperature is 47 degrees F., and mean summer temperature if 68 degrees F.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Nunn and Platner soils. These soils have fine textured control sections.
DRAINAGE AND PERMEABILITY: Somewhat poorly drained; slow runoff; slow permeability. These soils have a fluctuating water table at or above depth of 40 inches during some part of most years.
USE AND VEGETATION: This soil are used as native pastureland or with proper management they may be tilled to adapted crops.
DISTRIBUTION AND EXTENT: Eastern Colorado. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Denver, Colorado
SERIES ESTABLISHED: Logan County, Colorado, 1974.
REMARKS: Last updated by the state 6/74."