LOCATION LOVELAND CO+NM WYEstablished Series
TAXONOMIC CLASS: Fine-loamy over sandy or sandy-skeletal, mixed, superactive, calcareous, mesic Fluvaquentic Endoaquolls
TYPICAL PEDON: Loveland clay loam - grassland. (Colors are for dry soil unless otherwise noted.)
A--0 to 11 inches; dark grayish brown (10YR 4/2) clay loam, very dark brown (10YR 2/2) moist; moderate fine granular structure; soft, very friable; calcareous; moderately alkaline (pH 8.2); clear smooth boundary. (6 to 14 inches thick)
Ag--11 to 20 inches; dark grayish brown (10YR 4/2) light clay loam, very dark brown (10YR 2/2) moist; common medium distinct yellowish brown (10YR 5/4) mottles; weak medium subangular blocky structure parting to fine granules; slightly hard, very friable, plastic; peds are hard, firm; calcareous; moderately alkaline (pH 8.2); gradual wavy boundary. (6 to 10 inches thick)
Ckzg--20 to 30 inches; grayish brown (10YR 5/2) light clay loam, dark grayish brown (10YR 4/2) moist; common medium distinct yellowish brown (10YR 5/4) mottles; massive; hard, friable, plastic; some secondary calcium carbonate occurring as concretions, and calcium sulfate occurring as crystals; calcareous; moderately alkaline (pH 8.3); gradual wavy boundary. (8 to 28 inches thick)
2Cg--30 to 60 inches; very gravelly sand; many redoximorphic features with strong brown (7.5YR 5/6) moist.
TYPE LOCATION: Boulder County, Colorado; approximately 70 feet east and 250 feet north of W1/4 corner Sec. 11, T. 2 N., R. 69 W.
RANGE IN CHARACTERISTICS:
Soil moisture: moist for more than 60 but less than 90 consecutive days in the moisture control section
Mean annual soil temperature: 47 to 58 degrees F.
Depth to mollic epipedon: 12 to 24 inches
Depth to calcic horizon: 12 to 24 inches
Depth to the sand and gravel substratum: 20 to 40 inches
Particle-size control section (weighted average):
Clay content: 18 to 35 percent
Silt content: 20 to 55 percent
Sand content: 20 to 50 percent
Rock fragments: 0 to 15 percent
Size: gravel
A horizon:
Hue: 5Y to 7.5YR
Value: 4 or 5, 2 or 3 moist
Chroma: 1 to 3
Reaction: moderately or strongly alkaline
C horizon:
Hue: 5Y to 7.5YR
Reaction: moderately or strongly alkaline
Note: Accumulation of carbonate is absent in some pedons below depths of 20 inches. Pebbles range from 20 to 55 percent in the IIC horizon or contrasting layer.
COMPETING SERIES:
The current competitors are the
Lex,
Swope and
Woofus series.
The Lex soils are usually moist for more than 90 consecutive days when the soil temperature at 20 inches is 41 degrees F.
Lex soils receive 22 or more inches of mean annual precipitation.
Swope and Woofus soils are dry for longer periods in the soil moisture control section.
Swope soils have less than 25 percent gravel in the 2C horizon.
GEOGRAPHIC SETTING:
Parent Material: alluvial sediments
Landform: flood plains and low terraces
Slope: 0 to about 6 percent
Mean annual temperature: 48 degrees F.
Mean annual precipitation: 15 to 18 inches
Note: Fluctuating water tables keep the soil saturated for a part of each year.
GEOGRAPHICALLY ASSOCIATED SOILS:
These are the
Calkins and
Niwot soils.
Calkins oils are coarse-loamy and have argillic epipedons 24 to 50 inches thick.
Niwot soils are noncalcareous throughout.
DRAINAGE AND PERMEABILITY:
Drainage: somewhat poorly drained
Runoff: low
Permeability: moderate
USE AND VEGETATION: Used as native pastureland and for irrigated crops. Principal native vegetation is Junegrass, bluegrass, and blue grama.
DISTRIBUTION AND EXTENT: Central portions of Colorado bordering the front range. The series is of moderate extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Denver, Colorado
SERIES ESTABLISHED: Boulder Area, Colorado, 1971.
REMARKS: This revision documents a change at the subgroup level from Typic to Fluvaquentic Haplaquolls.
Last updated by the state 4/80.
Diagnostic horizons and features recognized in this profile are:
Mollic epipedon: 0 to 20 inches (A horizon)
Calcic horizon: 20 30 inches (Ck horizon)
Updated the classification, competing series and placed in semitab format. LRM 03/01