LOCATION MAYTOWN                 WA

Established Series
Rev. CJM/DRU/EED
04/2017

MAYTOWN SERIES

Landscape--river valleys
Landform--flood plains, stream terraces
Slope--0 to 10 percent
Parent material--alluvium
Mean annual precipitation--about 1500 mm
Mean annual air temperature--about 11 degrees C
Depth class--very deep
Drainage class--moderately well drained
Soil moisture regime--xeric
Soil temperature regime--mesic
Soil moisture subclass--aquic

TAXONOMIC CLASS: Fine-silty, mixed, superactive, mesic Aquic Cumulic Haploxerolls

TYPICAL PEDON: Maytown silt loam in an area of hayland (When described on October 5, 2015, the soil was dry to a depth of 60 cm and moist below that depth.)

Ap1--0 to 13 cm; silt loam, very dark brown (10YR 2/2) moist, brown (10YR 4/3) dry; strong fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine and common fine roots; few medium tubular pores and many fine and few medium irregular pores; moderately acid (pH5.6); abrupt smooth boundary

Ap2--13 to 43 cm; silt loam, very dark grayish brown (10YR 3/2) moist, brown (10YR 4/3) dry; strong very fine subangular blocky structure; slightly hard, friable, slightly sticky and slightly plastic; common very fine roots; common very fine and fine and few medium tubular pores; moderately acid (pH 5.7); clear wavy boundary

AB--43 to 60 cm; silty clay loam, dark brown (10YR 3/3) moist, dark yellowish brown (10YR 3/4) dry; strong very fine subangular blocky structure; slightly hard, friable, slightly sticky and moderately plastic; common very fine roots; common very fine and few medium tubular pores and few medium irregular pores; moderately acid (pH 5.9); clear wavy boundary

Bw--60 to 70 cm; silty clay loam, dark yellowish brown (10YR 3/4) moist, yellowish brown (10YR 5/4) dry; strong very fine subangular blocky structure; slightly hard, friable, slightly sticky and moderately plastic; few very fine roots; common very fine and few medium tubular pores and few medium irregular pores; moderately acid (pH 6.0); abrupt wavy boundary

Bg1--70 to 120 cm; silty clay loam, dark yellowish brown (10YR 3/4) moist, yellowish brown (10YR 5/4) dry; moderate fine subangular blocky structure; moderately hard, firm, moderately sticky and moderately plastic; few very fine roots; few very fine and fine tubular pores; 10 percent fine distinct grayish brown (10YR 5/2) iron depletions throughout and 10 percent fine prominent yellowish red (5YR 4/6) masses of oxidized iron on faces of peds; moderately acid (pH 6.0); clear wavy boundary

Bg2--120 to 150 cm; loam, dark yellowish brown (10YR 3/4) moist, yellowish brown (10YR 5/4) dry; weak medium subangular blocky structure; slightly hard, firm, slightly sticky and slightly plastic; 20 percent fine distinct grayish brown (10YR 5/2) iron depletions and 20 percent fine prominent yellowish red (5YR 4/6) masses of oxidized iron throughout; moderately acid (pH 6.0)

TYPE LOCATION: Thurston County, Washington, about 3 km southeast of Rochester and 750 m south of James Road; 785 m north and 365 m east of the southwest corner of section 9, T. 15 N., R. 3 W., Willamette Meridian; Rochester, Washington, U.S. Geological Survey quadrangle; latitude 46.8000740 degrees north, longitude 123.0717180 degrees west, WGS 84 (coordinates determined with a GPS)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--10 to 12 degrees C
Soil moisture control section--dry 45 to 60 days following summer solstice
Mollic epipedon thickness--50 to 100 cm (includes Bw horizon, and Bg horizon in some pedons)
Depth to aquic conditions--50 to 75 cm
Reaction (pH)--5.1 to 6.5
Particle-size control section--18 to 35 percent clay (weighted average); 0 to 15 percent sand

A horizon
Hue--10YR, 7.5YR
Value--2, 2.5, or 3 moist, 4 or 5 dry
Chroma--1 to 3 moist or dry
Fine-earth texture--silty clay loam, silt loam
Organic carbon content--2 to 6 percent
Combined thickness--30 to 55 cm

AB horizon
Hue--7.5YR, 10YR
Value--3 or 4 dry
Chroma--2 or 3 moist
Fine-earth texture--silty clay loam, silt loam
Organic carbon content--0.5 to 3.0 percent
Thickness--15 to 35 cm

Bw horizon (where present)
Hue--10YR, 2.5Y
Value--3 to 6 moist, 5 to 7 dry
Chroma--3 or 4 moist
Fine-earth texture--silty clay loam, silt loam
Organic carbon content--0.5 to 3.0 percent
Thickness--10 to 25 cm

Bg1 horizon
Hue--7.5YR to 2.5Y
Value--3 to 6 moist, 4 to 7 dry
Chroma--2 to 4 moist or dry
Fine-earth texture--silt loam, silt clay loam
Organic carbon content--0.30 to 1.75 percent
Thickness--25 to 75 cm

Bg2 horizon
Hue--7.5YR to 2.5Y
Value--3 to 6 moist, 4 to 7 dry
Chroma--2 to 4 moist or dry
Fine-earth texture--loam, silt loam, silt clay loam, clay loam, silty clay, fine sandy loam
Clay content--15 to 50 percent
Organic carbon content--0.30 to 1.75 percent

COMPETING SERIES:
McBee--dry 90 days following summer solstice in soil moisture control section; mean annual soil temperature of 11 to 13 degrees C; pH of 5.6 to 6.0

GEOGRAPHIC SETTING:
Elevation--0 to 150 m
Mean annual precipitation--1100 to 1800 mm
Mean annual air temperature--10 to 11 degrees C
Frost-free period--150 to 200 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Chehalis--no aquic conditions within 120 cm of the soil surface; in linear to convex positions of similar landforms
Eld--greater than 15 percent sand in particle-size control section; no aquic conditions; in slightly convex to linear flood plain positions and on alluvial terraces
Elma, Newberg, Scatter--no aquic conditions; on convex natural levees, flood plains, and alluvial terraces
Godfrey, Rennie--aquic conditions to the soil surface; in concave positions of similar landforms
Salzer--aquic conditions to the soil surface; frequent, very long periods of ponding; in oxbows and backswamps

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--moderately well drained
Depth to apparent seasonal water table--50 to 100 cm at times in November through April
Flooding--occasional or frequent, brief periods in November through March
Ponding--none to occasional, long periods in December through February
Saturated hydraulic conductivity (Ksat)--moderately high or high in A, AB, and Bw horizons, moderately low to high in Bg horizon

USE AND VEGETATION:
Use--hay production, livestock grazing, and crop production in cleared areas; wildlife habitat
Native vegetation--Douglas-fir, western redcedar, bigleaf maple, black cottonwood, red alder, salmonberry, common snowberry, beaked hazelnut, red elderberry, vine maple, willow, western swordfern

DISTRIBUTION AND EXTENT: Central western Washington; MLRA 2; small extent

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

SERIES ESTABLISHED: Thurston County, Washington; 1949

REMARKS:
Diagnostic horizons and other features in this pedon
*Particle-size control section--zone from 25 to 100 cm
*Mollic epipedon--zone from the surface to a depth of 60 cm
*Cambic horizon--zone from 60 to 150 cm
*Aquic conditions--zone from 70 to 150 cm
*Redoximorphic iron depletions with chroma of 2 or less--zone from 70 to 150 cm

11/2016--The classification was changed from fine-silty, mixed, superactive, mesic Fluventic Haploxerolls based on data from an update project. The official series description was edited according to SSR01 Technical Note--Content and Format of Official Series Descriptions (revised 12/2015). Further field investigation in the flood plains of MLRA 2 is recommended.

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National Cooperative Soil Survey
U.S.A.