LOCATION CARRICO ID

Established Series
Rev. BDG/EMM
07/2013

CARRICO SERIES

The Carrico series consists of moderately deep, well drained soils on mountain slopes. They formed in mixed volcanic ash, loess and residuum from granite. Saturated hydraulic conductivity is moderately high. Slope ranges from 5 to 80 percent. The average annual air temperature is about 6 degrees C. The average annual precipitation is about 711 mm.

TAXONOMIC CLASS: Fine-loamy, isotic, frigid Vitrandic Haploxeralfs

TYPICAL PEDON: Carrico ashy silt loam, forested; on a southwest facing mountain slope with 32 percent slope at an elevation of 1012 meters. Pedon was described on October 12, 2003 and was moist to 15 cm then dry below.(Colors are for dry soil unless otherwise noted.)

Oi--0 to 1 cm; moderately decomposed plant material; abrupt smooth boundary. (1 to 2 cm thick)

A1--1 to 9 cm; dark grayish brown (10YR 4/2) ashy silt loam, very dark brown (10YR 2/2) moist; moderate very fine and fine granular structure; moderately hard, friable, nonsticky, nonplastic; many very fine and fine roots; common very fine irregular pores; moderately acid (pH 6.0); abrupt wavy boundary.

A2--9 to 15 cm; brown (10YR 4/3) ashy silt loam, very dark brown (10YR 2/2) moist; weak fine and medium subangular blocky structure parting to moderate very fine and fine granular structure; moderately hard, friable, nonsticky, nonplastic; many very fine and fine roots; common very fine tubular and common very fine irregular pores; moderately acid (pH 5.7); clear wavy boundary. (Combined thickness of A horizons is 3 to 15 cm)

AB--15 to 21 cm; brown (10YR 4/3) ashy silt loam, dark brown (10YR 3/3) moist; moderate fine and medium subangular blocky structure; hard, friable, slightly sticky, slightly plastic; common very fine and fine roots between peds; common very fine tubular and common very fine irregular pores; moderately acid (pH 5.7); clear wavy boundary. (0 to 15 cm thick)

BA--21 to 33 cm; light yellowish brown (10YR 6/4) silt loam, brown (10YR 4/3) moist; moderate fine and medium subangular blocky structure; hard, friable, moderately sticky, moderately plastic; common very fine and fine roots between peds and few medium roots; common very fine tubular and common very fine irregular pores; 1 percent faint silt coats on surfaces along pores; moderately acid (pH 5.8); clear wavy boundary. (0 to 23 cm thick)

Bt1--33 to 51 cm; light yellowish brown (10YR 6/4) gravelly loam, dark yellowish brown (10YR 4/4) moist; moderate fine and medium subangular blocky structure; hard, friable, moderately sticky, very plastic; common very fine and fine roots between peds and few medium roots between peds; common very fine tubular and common very fine irregular pores; 1 percent distinct clay films on surfaces along pores and 10 percent distinct silt coats on surfaces along pores; 25 percent subrounded indurated syenite gravel and 5 percent subrounded indurated syenite stones; moderately acid (pH 5.8); clear wavy boundary.

Bt2--51 to 62 cm; light yellowish brown (10YR 6/4) very gravelly loam, dark yellowish brown (10YR 4/4) moist; weak fine and medium subangular blocky structure; hard, friable, moderately sticky, very plastic; common very fine and fine roots between peds and few medium roots; common very fine tubular and common very fine irregular pores; 2 percent distinct clay films on surfaces along pores and 3 percent distinct clay films on vertical faces of peds and 5 percent distinct silt coats on vertical faces of peds; 30 percent subrounded indurated syenite gravel and 10 percent subrounded moderately cemented syenite paragravel and 10 percent subrounded indurated syenite stones; moderately acid (pH 5.9); abrupt irregular boundary. (Combined thickness of Bt horizons is 25 to 79 cm)

R--62 to 66 cm; very strongly cemented syenite bedrock, fractured at intervals of 10 to <46 cm.

TYPE LOCATION: Latah County, Idaho; 1300 feet north and 200 feet west of the southeast corner of section 22, T 42N, R 4W; Princeton, Idaho USGS quadrangle; 46 degrees, 57 minutes, 50.00 seconds north latitude and 116 degrees, 48 minutes, 50.00 seconds west longitude; UTM 514169 meters E, 5201178 meters N, zone 11 NAD83, USGS Princeton Quad.

RANGE IN CHARACTERISTICS:

Depth to restrictive feature: 50 to 100 cm to bedrock (paralithic)
Soil moisture control section - usually dry for 45 to 60 consecutive days during June to October. Xeric moisture regime.
Average annual soil temperature - 41 to 46 degrees F.
Particle size control section - the upper 50 cm of the argillic horizon averages 18 to 35 percent clay content and 0 to 35 percent rock fragment content

A horizons
Hue - 7.5YR or 10YR moist
Value - 4 to 6 dry, 2 or 3 moist
Chroma - 2 or 3 dry and 1 to 4 moist
Texture - ashy silt loam
Clay content - 8 to 16 percent
Rock fragments - 0 to 8 percent gravel
Reaction - 5.1 to 6.5
Volcanic glass in the 0.02 to 2.0 mm fraction - 5 to 25 percent
Acid-oxalate extractable Al+1/2Fe - 0.4 to 1.0 percent

AB and BA horizons
Value - 4 to 6 dry, 2 to 4 moist
Chroma - 3 or 4 dry, 2 to 4 moist
Texture - loam, silt loam, ashy loam or ashy silt loam
Clay content - 8 to 19 percent
Rock fragments - 0 to 8 percent gravel
Reaction - 5.1 to 6.5
Volcanic glass in the 0.02 to 2.0 mm fraction - 4 to 25 percent
Acid-oxalate extractable Al+1/2Fe - 0.25 to 1.0 percent

BE and E horizons (where present)
Hue - 7.5YR or 10YR moist
Value - 5 to 7 dry, 4 to 6 moist
Chroma- 2 to 4 dry, 3 to 6 moist
Texture - loam or silt loam
Clay content - 18 to 25 percent
Rock fragments - 0 to 3 percent gravel
Reaction - 5.6 to 6.5

Bt horizons
Hue - 7.5YR or 10YR dry, 5YR to 10YR moist
Value - 4 to 7 dry and 3 or 4 moist
Chroma - 3 to 6 dry, 2 to 6 moist
Hue - 7.5YR or 10YR dry or moist
Texture - loam or silt loam
Clay content - 16 to 25 percent
Rock fragments - 2 to 30 percent gravel, 0 to 5 cobbles, 0 to 5 percent stones, 2 to 35 percent total rock fragment content
Reaction - 5.1 to 6.5

BC horizons (where present)
Hue - 10YR dry or moist
Value - 6 or 7 dry and 3 or 4 moist
Chroma - 4 dry, 4 to 6 moist
Texture - loam or sandy loam
Clay content - 14 to 25 percent
Rock fragments - 5 to 30 percent gravel, 0 to 10 percent paragravel, 0 to 15 percent cobbles, 0 to 50 percent stones, 5 to 55 percent total hard fragment content, 0 to 10 percent parafragment content
Reaction - 5.1 to 6.5

C horizons (where present)
Hue - 10YR dry or moist
Value - 6 dry and 4 moist
Chroma - 4 dry or moist
Texture - fine sandy loam
Clay content - 8 to 12 percent
Rock fragments - 0 to 10 percent gravel, 45 to 75 percent paragravel, 0 to 10 percent total hard fragment content, 45 to 75 percent parafragment content
Reaction - 5.1 to 5.5

COMPETING SERIES:
Eaglelake soils - are deep to a paralithic contact
Ketchly soils - are deep and very deep
Nard soils - are deep and very deep
Kruse soils - are very deep
McEwen soils - are very deep
Nahahum soils - are very deep
Nardmont soils - are very deep
Neuske soils - are very deep
Panak soils - are very deep

GEOGRAPHIC SETTING: Carrico soils are on mountain slopes. They are at elevations of 826 to 1242 meters. They have slopes ranging from 5 to 75 percent. These soils formed in mixed volcanic ash, loess and material weathered from granite. The average annual temperature is 4.4 to 7.2 degrees C. The average annual precipitation is 686 to 1041 mm and the frost-free season is 95 to 130 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Carlinton, Keeler and Kruse series. Carlinton soils are on hills and broad ridges, are fine-silty and moderately deep to a fragipan. Keeler soils are on mountain slope and ridges, are very deep and have a udic moisture regime. Kruse soils are on mountain slopes, ridges and hills and are very deep.

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY: Well drained. Saturated hydraulic conductivity is moderately high.

USE AND VEGETATION: This soil is used primarily for timber production,
livestock grazing, wildlife habitat, recreation, and watershed. The
natural vegetation is mainly Douglas-fir, ponderosa pine, common snowberry, creambush oceanspray, bluebunch wheatgrass, Idaho fescue, white spirea and baldhip rose.

DISTRIBUTION AND EXTENT: North-Central Idaho. Carrico soils are not extensive. MLRA 43A.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: BOZEMAN, MONTANA

SERIES ESTABLISHED: Latah County, Idaho, 2013.

REMARKS: Diagnostic and other feature recognized in this pedon are:

Ochric epipedon - The zone from 1 to 15 cm (A1 and A2 horizons)

Argillic horizon - The zone from 33 to 62 cm (Bt1 and Bt2 horizons)

Vitrandic feature - The zone from 1 to 21 cm (A1, A2 and AB horizons)

Lithic contact - The zone starting at 62cm (R horizon)

Particle size control section - The zone from 33 to 62 cm (Bt1 and Bt2 horizons).

ADDITIONAL DATA: Laboratory data is available for this series: Soil survey sample no. S04-ID-057-002 (project no. C2004USID198, Pedon no. 04N1098)(a similar pedon) from Latah County, Idaho by NSSL, Lincoln, NE.

National Cooperative Soil Survey
U.S.A.