LOCATION MCNULTY                 OR

Established Series
Rev. GLG-AON
06/2011

MCNULTY SERIES

The McNulty series consists of very deep, well drained soils that formed in recent mixed alluvium. McNulty soils are on flood plains and have slopes of 0 to 3 percent. The mean annual precipitation is about 65 inches. The mean annual temperature is about 50 degrees F.

TAXONOMIC CLASS: Coarse-loamy, mixed, superactive, mesic Fluventic Dystrudepts

TYPICAL PEDON: McNulty silt loam, pasture. (Colors are for moist soil unless otherwise noted.)

Ap1--0 to 6 inches; very dark grayish brown (10YR 3/2) silt loam, brown (10YR 4/3) dry; moderate fine granular structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine roots; many very fine irregular pores; slightly acid (pH 6.2); clear smooth boundary. (4 to 7 inches thick)

Ap2--6 to 9 inches; dark brown (10YR 3/3) silt loam, brown (10YR 5/3) dry; moderate fine subangular blocky structure; slighty hard, friable, slightly sticky and slightly plastic; many very fine roots; many very fine tubular pores; moderately acid (pH 6.0); clear smooth boundary. (3 to 5 inches thick)

Bw1--9 to 23 inches; brown (10YR 4/3) silt loam, yellowish brown (10YR 5/4) dry; moderate medium subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common fine roots; many very fine tubular pores; moderately acid (pH 6.0); clear wavy boundary. (5 to 15 inches thick)

Bw2--23 to 32 inches; brown (10YR 4/3) loam, yellowish brown (10YR 5/4) dry; weak coarse subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common fine roots; many very fine tubular pores; moderately acid (pH 6.0); clear wavy boundary. (5 to 15 inches thick)

2C1--32 to 40 inches; dark yellowish brown (10YR 4/4) sandy loam, yellowish brown (10YR 5/4) dry; massive; soft, very friable, nonsticky and nonplastic; common fine roots; many very fine tubular pores; moderately acid (pH 5.8); clear wavy boundary. (5 to 10 inches thick)

3C2--40 to 60 inches; dark yellowish brown (10YR 4/4) silt loam, light yellowish brown (10YR 6/4) dry; massive; slightly hard, friable, slightly sticky and slightly plastic; few roots; moderately acid (pH 5.6); clear wavy boundary. (10 to 20 inches thick)

4C3--60 to 70 inches; dark yellowish brown (10YR 4/4) loamy sand, light yellowish brown (10YR 6/4) dry; massive; soft, very friable, nonsticky and nonplastic; few roots; moderately acid (pH 5.6).

TYPE LOCATION: Columbia County, Oregon; northwest 1/4 southwest 1/4 northeast 1/4, sec. 23, T. 5 N., R. 4 W.

RANGE IN CHARACTERISTICS: The soil is usually moist but is dry for a short period of less than 45 consecutive days between depths of 4 to 12 inches after the summer solstice. The mean annual soil temperature is 47 to 54 degrees F. The particle-size control section is silt loam or loam in the upper 20 inches and sandy loam, loam or silt loam below this depth. It has an average of 10 to 18 percent clay and more than 15 percent coarser than very fine sand. The solum is 21 to 30 inches thick.

The A horizon has value of 2 or 3 moist, 4 or 5 dry, and chroma of 2 or 3 moist and dry. It is 12 to 18 percent clay. It is very strongly acid through slightly acid. It is 7 to 10 inches thick.

The Bw horizon has chroma of 3 or 4 moist and dry. It is loam or silt loam and averages 12 to 18 percent clay. It is very strongly acid through moderately acid.

The 2C horizon has value of 4 or 5 moist, 5 or 6 dry and chroma of 3 or 4 moist and dry. It is stratified sandy loam, loam, and silt loam. Loamy sand commonly is below 60 inches. It averages 8 to 18 percent clay above the loamy sand horizon. It is very strongly acid through moderately acid.

COMPETING SERIES: There are no competing series in this family.

GEOGRAPHIC SETTING: McNulty soils are on flood plains at elevations of 40 to 800 feet. The soils formed in recent mixed alluvium. The climate is characterized by cool wet winters and warm moist summers. The mean annual precipitation is 60 to 90 inches. Mean January temperature is 35 to 37 degrees F., mean July temperature is 60 to 63 degrees F., and the mean annual temperature is 45 to 52 degrees F. The frost-free period is 100 to 210 days.

GEOGRAPHICALLY ASSOCIATED SOILS: These are the Eilertsen and Kauppi soils. Eilertsen soils are on associated terraces and have an argillic horizon and are fine-silty. Kauppi soils are moderately well drained and are fine-silty.

DRAINAGE AND PERMEABILITY: Well drained; slow runoff; moderate permeability.

USE AND VEGETATION: These soils are used for hay, pasture, recreation and wildlife habitat. Native vegetation is Douglas-fir, bigleaf maple, vine maple, red alder, western hazel, common snowberry, red huckleberry, western swordfern, salal, and grasses.

DISTRIBUTION AND EXTENT: Upland valleys of the Coast Range in Columbia County, Oregon; MLRA 1. The series is inextensive.

MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Portland, Oregon

SERIES ESTABLISHED: Columbia County, Oregon, 1983.

REMARKS: Diagnostic horizons and other features;
Ochric epipedon
Humic subgroup - color requirements are met from 0 to 9 inches
Cambic horizon - from 9 to 32 inches

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National Cooperative Soil Survey
U.S.A.