LOCATION TERRY CO+MT WYEstablished Series
TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, mesic Ustic Haplargids
TYPICAL PEDON: Terry fine sandy loam in grassland (Colors are for dry soil unless otherwise noted.)
A--0 to 13 centimeters (0 to 5 inches); light brownish gray (10YR 6/2) fine sandy loam, dark grayish brown (10YR 4/2) moist; moderate fine granular structure; soft, very friable; few scattered sandstone fragments; slightly alkaline (pH 7.6); clear smooth boundary. (10 to 15 centimeters (4 to 6 inches) thick)
Bt--13 to 36 centimeters (5 to 14 inches); light olive brown (2.5Y 5/3) fine sandy loam, olive brown (2.5Y 4/3) moist; moderate medium prismatic structure parting to moderate medium subangular blocky; slightly hard, very friable; common thin glossy patches on faces of peds, glossy coatings on inside of root channels and coating sand grains, wax-like bridges between sand grains; slightly alkaline (pH 7.5); clear smooth boundary. (18 to 48 centimeters (7 to 19 inches) thick)
BCk--36 to 46 centimeters (14 to 18 inches); light olive brown (2.5Y 5/3) fine sandy loam, olive brown (2.5Y 4/3) moist; weak medium subangular blocky structure; slightly hard, very friable; few glossy patches on faces of peds, some glossy coatings on sand grains; calcium carbonate occurring as small concretions; strongly effervescent; moderately alkaline (pH 8.2); gradual smooth bounary. (10 to 13 centimeters (4 to 5 inches) thick)
Ck--46 to 66 centimeters (18 to 26 inches); light brownish gray (2.5Y 6/2) fine sandy loam, grayish brown (2.5Y 5/2) moist; massive; slightly hard, very friable; some visible calcium carbonate occurring as concretions and in thin seams and streaks; strongly effervescent; moderately alkaline (pH 8.2); gradual wavy boundary. (13 to 25 centimeters (5 to 10 inches) thick)
Cr--66 centimeters (26 inches); weakly indurated, calcareous sandstone containing some thin discontinuous hard ledges of sandstone.
TYPE LOCATION: Weld County, Colorado; 0.3 kilometers (0.2 mile) north and 73 meters (240 feet) east of the southwest corner of sec. 23, T. 7 N., R. 62 W.
RANGE IN CHARACTERISTICS:
Depth to calcareous material: 15 to 51 centimeters (6 to 20 inches)
Thickness of solum: 38 to 76 centimeters (15 to 30 inches)
Depth to bedrock: 51 to 102 centimeters (20 to 40 inches)
Weighted average content of organic carbon in the upper 38 centimeters (15 inches): exceeds .4 percent and decreases uniformly with depth
Sand/clay ratio: 3 to 10
Content of coarse fragments: 0 to 15 percent
Mean annual soil temperature: 8 to 14 degrees C. (47 F. to 58 degrees F.)
Mean summer soil temperature: 15 to 26 degrees C. (59 F. to 78 degrees F.)
A horizon:
Hue: 2.5Y or 10YR
Value: 5 to 7, 3 or 4 moist
Chroma: 1 to 3
Structure: usually granular but subangular blocky in some pedons
Rupture resistance: soft or slightly hard
Reaction: neutral or moderately alkaline (pH 6.6 to pH 7.8)
Bt horizon:
Hue: 2.5Y or 10YR
Value: 5 to 7, 4 or 5 moist
Chroma: 2 to 4
Structure: usually prismatic but subangular blocky in some pedons
Texture: typically sandy loam
Clay content: 10 to 18 percent
Silt content: 5 to 40 percent
Sand content: 45 to 80 percent with more than 35 percent being fine sand or coarser and excluding any loamy sand
Clay films: oriented in some part of the horizon
Reaction: neutral or moderately alkaline (pH 6.6 to pH 7.8)
Ck horizon: (if present)
Hue: 5Y to 10YR
Reaction: moderately alkaline or strongly alkaline (pH 7.9 to 8.6)
Calcium carbonate equivalent: 4 to 12 percent
COMPETING SERIES: These are the
Betonnie,
Bijou,
Terro,
Tintero and
Vonalee series.
Betonnie soils do not have lithic contacts at 51 to 102 centimeters (20 to 40 inches)
Bijou soils lack a paralithic contact at a depth of less than 102 centimeters (40 inches) and noncalcareous throughout.
Terro soils formed in residuum, alluvium and colluvium.
Tintero soils typically have redder hues.
Vonalee soils formed in coarse and moderately coarse alluvium or eolian deposits derived largely from calcareous sandstone.
GEOGRAPHIC SETTING:
Landform: on hills, smooth plains, and ridges
Parent material: sediments weathered residually from soft sandstone
Slopes: 1 to 30 percent
Average annual precipitation: 36 centimeters (14 inches), 20 centimeters (8 inches) of which falls during the period of April through September
Average annual temperature: 9 degrees C. (48 degrees F.)
Average summer temperature: 21 degrees C. (70 degrees F.)
GEOGRAPHICALLY ASSOCIATED SOILS: These are the
Otero and
Vona soils.
Otero soils lack a paralithic contact at a depth of less than 40 inches and have no argillic horizon.
Vona soils occur in some landscapes in a topograhic sequence with Terry soils.
DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage: well drained
Runoff; low
Saturated Hydraulic Conductivity: high
USE AND VEGETATION: In dry farm areas, the soils are used for production of native pasture, wheat, millet, corn, and sorghum.
Under irrigation, alfalfa, small grains, corn, potatoes, and sugar beets are grown.
Native vegetation is sand reedgrass, little bluestem, sand bluestem, needleandthread grass, sand dropseed, blue grama, wild buckwheat, cactus, and yucca.
DISTRIBUTION AND EXTENT: Eastern Colorado and Wyoming and southern Montana. The series is moderately extensive.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Denver, Colorado
SERIES ESTABLISHED: Fort Collins Area, Colorado, 1927.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Modified format by LRM in 6/2006 to include metric conversion and change permeability to saturated hydraulic conductivity.