LOCATION LARAND CO
Established Series
Rev. AJC/GB/KLS
08/2022
LARAND SERIES
The Larand series consists of deep, well drained soils that formed in glacial till or glacial outwash materials derived from granitic and metamorphic rocks. Larand soils are on alluvial fans and mountain side slopes. Slopes are 2 to 40 percent. The mean annual precipitation is about 460 mm, and the mean annual air temperature is about 2 degrees C.
TAXONOMIC CLASS: Loamy-skeletal, mixed, superactive Ustic Glossocryalfs
TYPICAL PEDON: Larand fine sandy loam - forest land. (Colors are for dry soil unless otherwise noted.)
Oi--0 to 3 cm; undecomposed organic material, mostly needles, bark, and twigs.
Oe--3 to 6 cm; partially decomposed organic material like that of the horizon above.
E--6 to 31 cm; light gray (10YR 7/2) fine sandy loam, pale brown (10YR 6/3) moist; moderate medium platy structure parting to fine granular; soft, very friable, nonsticky and nonplastic; moderately acid (pH 6.0); gradual wavy boundary. (15 to 36 cm thick)
E/B--31 to 46 cm; mixed light gray (10YR 7/2) and light yellowish brown (10YR 6/4) heavy fine sandy loam, pale brown (10YR 6/3) and yellowish brown (10YR 5/4) moist; weak fine subangular blocky structure parting to fine granular; slightly hard, very friable, nonsticky and nonplastic; primary peds are hard; few glossy patches on the more clayey peds; 5 percent pebbles and cobbles; this horizon consists of seams and nodules of material like that of the underlying horizon embedded in a light colored matrix like that of the overlying horizon; slightly acid (pH 6.2); diffuse wavy boundary. (10 to 20 cm thick)
Bt--46 to 76 cm; light yellowish brown (10YR 6/4) extremely gravelly sandy clay loam, yellowish brown (10YR 5/4) moist; moderate medium subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; peds are very hard; thin wax-like patches of faces of peds; wax-like coatings and fillings in root channels and pores; wax-like coatings on the underside of rock fragments and bridging between sand grains; 60 percent pebbles and cobbles; slightly acid (pH 6.4); diffuse wavy boundary. (20 to 75 cm thick)
BC--76 to 86 cm; light yellowish brown (10YR 6/4) extremely gravelly light sandy clay loam, yellowish brown (10YR 5/4) moist; weak medium subangular blocky structure; slightly hard, very friable, slightly sticky and slightly plastic; peds are hard; few glossy patches on faces of peds; some wax-like coatings on the underside of rock fragments and as bridging between sand grains; 60 percent pebbles and cobbles; slightly acid (pH 6.4); diffuse wavy boundary. (0 to 15 cm thick)
2C--86 to 157 cm; light yellowish brown (10YR 6/4) extremely gravelly sand, yellowish brown (10YR 5/4) moist; single grained; loose; 70 percent pebbles and cobbles; slightly acid (pH 6.4).
TYPE LOCATION: Jackson County, Colorado; about 120 meters east and 120 meters north of the center of Sec. 3, T. 7 N., R. 77 W.
RANGE IN CHARACTERISTICS:
Mean annual soil temperature--2 to 6 degrees C
Mean summer soil temperature--11 to 13 degrees C
Depth to calcareous soil--150 cm
Base saturation--60 to 100 percent in all subhorizons of the argillic horizon
Depth to sandy-skeletal 2C horizon--60 to 140 cm
Depth to top of argillic horizon--less than 60 cm
Depth to the base of argillic horizon--40 to 140 cm
Rock fragment content--35 to 75 percent in the 25 to 100-cm section and are mainly 10 to 250 mm in diameter
These soils are dry in some part of the moisture control section for some period of nearly every year.
A horizon (if present)
Hue--5Y through 7.5YR
Value--5 or 6 dry, 3 or 4 moist
Chroma--1 through 3
Reaction--pH 5.6 to 7.8
E horizon
Hue--5Y through 7.5YR
Value--5 through 8 dry, 4 through 7 moist
Chroma--1 through 4
Reaction--pH 6.0 to 8.4
Bt horizon
Hue--5Y through 7.5YR
Value--5 through 7 dry, 4 through 6 moist
Chroma--1 through 6
Clay content--18 to 35 percent
Sand content--40 to 75 percent sand with more than 35 percent fine or coarser sand
Texture--sandy clay loam
Reaction--pH 5.6 to 8.4
2C horizon
Hue--5Y to 7.5YR. Subhorizons redder than 7.5YR occur in some pedons.
Texture--loamy sand or sand
Rock fragment content--35 to 60 percent gravel and cobbles
Reaction--pH 5.6 to 7.8
COMPETING SERIES: These are the
Agneston,
Angostura,
Cloud Peak,
Cundiyo,
Duchesne,
Frisco,
Gambler,
Granile, Guffy,
Hollandlake,
Hyattville,
Kebler,
Lake Creek,
Lakehelen,
Leadville,
Lulude, MacFarlane, (T)
Needleton,
Presa, (T)
Tamarron,
Tigeron,
Tolvar,
Trebor, and
Worock series. Agneston, Cloud Peak, Gambler, Hyattville, Kebler, Lake Creek, Lakehelen, Lulude, and Trebor soils have a lithic contact at a depth of less than 100 cm. Cundiyo and MacFarlane soils have less than 18 percent clay in the argillic horizon. Angostura, Duchesne, Frisco, Granile, Hollandlake, Leadville, MacFarlane, and Tolvar soils lack a sandy-skeletal 2C horizon above a depth of 100 cm. Needleton soils have hues of 5YR and redder in the Bt horizon. Angostura soils have rock fragments that are larger than 25 cm. Granile soils have an argillic horizon of loam or clay loam, with less than 35 percent fine and coarser sand, and the Tolvar soils have "hard setting" properties when dry. Leadville soils have hue of 5YR and redder. Presa soils lack a mixed E/B horizon. Tigeron and Worock soils lack extremely gravelly sandy C horizons, and Tigeron soils are dominantly strongly acid in the A and B horizons. Tamarron and Guffy soils have a paralithic contact above 100 cm.
GEOGRAPHIC SETTING:
Landform--alluvial fans and mountain side slopes
Elevation--2675 meters
Slope--2 to 40 percent
Parent material--glacial till or glacial outwash materials which in some places has a thin eolian mantle
Mean annual precipitation--460 mm, with peak periods of precipitation during the spring and early summer
Mean annual air temperature--2 to 6 degrees C
GEOGRAPHICALLY ASSOCIATED SOILS: None listed
DRAINAGE AND PERMEABILITY: Well drained; medium runoff; moderate permeability.
USE AND VEGETATION: These soils are used for native pastureland, forestry, and recreation. Native vegetation is mainly lodgepole pine and a weak understory of shrubs and grasses.
DISTRIBUTION AND EXTENT: Larand soils are moderately extensive in the mountainous areas of central and northcentral Colorado; MLRA 48A
SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Bozeman, Montana
SERIES ESTABLISHED: Jackson County, Colorado, 1973
REMARKS: Converted to metric, updated formatting, and O horizons were updated to start at zero. 8/2022
National Cooperative Soil Survey
U.S.A.