LOCATION CONSER                  OR

Established Series
Rev. WRP/JGM/EED
10/2019

CONSER SERIES

Landscape--valleys
Landforms--depressions of stream terraces
Slope--0 to 3 percent
Parent material--alluvium derived from igneous and sedimentary rock
Mean annual precipitation--about 1300 mm
Mean annual air temperature--about 11 degrees C
Depth class--very deep
Drainage class--poorly drained
Soil moisture regime--aquic
Soil temperature regime--mesic
Soil moisture subclass--typic

TAXONOMIC CLASS: Fine, mixed, superactive, mesic Vertic Argiaquolls

TYPICAL PEDON: Conser silty clay loam in an area of pasture, on a slope of 1 percent at an elevation of 114 m

A--0 to 23 cm; silty clay loam, grayish brown (10YR 5/2) dry, very dark brown (10YR 2/2) moist; strong fine granular structure; hard, friable, moderately sticky and moderately plastic; many very fine and few fine roots; many fine irregular pores; few fine prominent strong brown (7.5YR 5/6) masses of iron accumulation; slightly acid (pH 6.2); clear smooth boundary

BAg--23 to 36 cm; silty clay, grayish brown (10YR 5/2) dry, very dark grayish brown (10YR 3/2) moist; weak medium prismatic structure parting to moderate medium subangular blocky; hard, firm, very sticky and very plastic; common very fine and fine roots; many very fine and few fine and medium tubular pores; common fine prominent strong brown (7.5YR 5/6) masses of iron accumulation; slightly acid (pH 6.2); clear smooth boundary

Btg1--36 to 69 cm; clay, grayish brown (10YR 5/2) dry, very dark gray (10YR 3/1) moist; weak medium prismatic structure parting to moderate medium and fine subangular blocky; very hard, firm, very sticky and very plastic; common very fine and fine roots; many very fine and few fine and medium tubular pores; common distinct clay films along pores and on faces of peds; common fine prominent strong brown (7.5YR 5/6) masses of iron accumulation; slightly acid (pH 6.4); clear smooth boundary

Btg2--69 to 104 cm; silty clay, pale brown (10YR 6/3) dry, brown (10YR 4/3) moist; weak coarse subangular blocky structure; very hard, firm, very sticky and very plastic; few very fine roots; many very fine and common fine tubular pores; many distinct very dark gray (10YR 3/1) clay films along pores; 15 percent medium distinct strong brown (7.5YR 5/6) masses of oxidized iron on surfaces along pores and on faces of peds and 10 percent fine faint dark grayish brown (10YR 4/2) iron depletions on surfaces along pores; slightly acid (pH 6.4); clear wavy boundary

2Cg1--104 to 124 cm; loam, light brownish gray (10YR 6/2) dry, dark grayish brown (10YR 4/2) moist; massive; hard, friable, slightly sticky and slightly plastic; few very fine roots; common very fine and fine pores; faint very dark gray (10YR 3/1) clay films along some pores; many medium prominent strong brown (7.5YR 4/6) masses of iron accumulation; slightly acid (pH 6.4); clear wavy boundary

2Cg2--124 to 150 cm; sandy loam, grayish brown (10YR 5/2) dry, dark grayish brown (10YR 4/2) moist; massive; slightly hard, very friable, nonsticky and nonplastic; many medium prominent strong brown (7.5YR 4/6) masses of iron accumulation; neutral (pH 6.8)

TYPE LOCATION: Lane County, Oregon, about 0.8 km northeast of the community of Irving; about 610 m east and 610 m south of the northwest corner of section 3, T. 17 S., R. 4 W.; latitude 44.1221587; longitude -123.1605657, datum WGS 84 (coordinates estimated from PLSS details)

RANGE IN CHARACTERISTICS:
Mean annual soil temperature--11 to 13 degrees C
Moisture control section--saturated at the surface to a depth of 45 cm in November through May
Thickness of mollic epipedon--60 to 85 cm
Depth to aquic conditions--0 to 25 cm
Depth to top of argillic horizon--20 to 45 cm
Depth to lithologic discontinuity--100 to 150 cm
Estimated linear extensibility at the surface to a depth of 40 cm--more than 6 cm

Particle-size control section
*Clay content--35 to 60 percent
*Total rock fragment content--0 to 10 percent

A horizon
Hue--10YR, 2.5Y
Value--2 or 3 moist, 3 to 5 dry
Chroma--1 or 2 moist or dry
Fine-earth texture--silty clay loam
Clay content--27 to 35 percent
Sand content--5 to 15 percent
Total rock fragment content--0 to 10 percent
Gravel content--0 to 10 percent
Reaction--5.6 to 6.5
Thickness--15 to 43 cm

BAg horizon
Hue--10YR, 2.5Y
Value--2 or 3 moist, 4 or 5 dry
Chroma--1 or 2 moist or dry
Fine-earth texture--silty clay loam, silty clay, clay
Clay content--35 to 50 percent
Sand content--5 to 15 percent
Total rock fragment content--0 to 10 percent
Gravel content--0 to 10 percent
Reaction--5.6 to 6.5
Thickness--0 to 28 cm

Btg1 horizon
Hue--10YR, 2.5Y
Value--3 to 5 moist, 4 to 6 dry
Chroma--1 to 3 moist or dry
Fine-earth texture--silty clay loam, silty clay, clay
Clay content--35 to 60 percent
Sand content--5 to 15 percent
Total rock fragment content--0 to 10 percent
Gravel content--0 to 10 percent
Reaction--5.6 to 6.5
Thickness--28 to 89 cm

Btg2 horizon
Hue--10YR, 2.5Y
Value--4 or 5 moist, 5 or 6 dry
Chroma--1 to 3 moist or dry
Fine-earth texture--silty clay loam, silty clay, clay
Clay content--35 to 60 percent
Sand content--5 to 15 percent
Total rock fragment content--0 to 10 percent
Gravel content--0 to 10 percent
Reaction--5.6 to 6.5
Thickness--0 to 50 cm

2Cg horizon
Hue--10YR, 2.5Y
Value--4 or 5 moist, 5 or 6 dry
Chroma--1 to 4 moist or dry
Fine-earth texture--stratified loam, sandy loam, clay loam, or sandy clay loam
Clay content--15 to 30 percent
Sand content--25 to 65 percent
Total rock fragment content--0 to 10 percent
Gravel content--0 to 10 percent
Reaction--6.1 to 7.3

COMPETING SERIES:
Konert--aquic conditions below a depth of 50 cm (somewhat poorly drained)
Lakaskia--mollic epipedon less than 45 cm thick; secondary carbonates in upper 150 cm; mean annual soil temperature higher than 13 degrees C
Reed--mollic epipedon less than 50 cm thick; 50 to 70 percent clay in particle-size control section
Rowe--mollic epipedon less than 60 cm thick; secondary carbonates in upper 150 cm
Uneeda--more than 15 percent sand in particle-size control section; secondary carbonates in upper 150 cm; mean annual soil temperature higher than 13 degrees C

GEOGRAPHIC SETTING:
Elevation--30 to 400 m
Climate--warm, dry summers; cool, moist winters
Mean annual precipitation--750 to 1500 mm
Mean annual air temperature--about 10 to 13 degrees C
Mean January air temperature--about 4 degrees C
Mean July air temperature--about 18 to 20 degrees C
Frost-free period--160 to 235 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Awbrig--ochric epipedon; abrupt textural change; in similar positions in MLRA 2
Clackamas--27 to 35 percent clay in particle size control section; aquic conditions at a depth of 15 to 45 cm; in convex positions in MLRA 2
Coburg--apparent water table at a depth of 75 to 100 cm; in linear positions
Malabon--no apparent water table within a depth of 150 cm; in linear and convex positions
Redbell--apparent water table at a depth of 20 to 50 cm; no cracking on surface; on stream terraces and alluvial fans in MLRA 5

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--poorly drained
Saturation in normal years--apparent water table at a depth of 15 cm above the surface to a depth of 25 cm below the surface in December through April
Flooding--rare
Ponding--frequent, long periods in January through March
Saturated hydraulic conductivity (Ksat)--moderately low

USE AND VEGETATION:
Use--production of grass seed, hay, and pasture
Potential natural vegetation--Oregon ash, rose, spirea, hawthorn, sedges

DISTRIBUTION AND EXTENT: Willamette Valley, Oregon, in MLRA 2 and Umpqua Valley, Oregon, in MLRA 5; moderate extent

SOIL SURVEY REGIONAL OFFICE (SSRO) RESPONSIBLE: Portland, Oregon

SERIES ESTABLISHED: Benton Area, Benton County, Oregon; 1970

REMARKS:
Diagnostic horizons and other features in this pedon
*Particle-size control section--zone from 36 to 86 cm
*Mollic epipedon--zone from the surface to a depth of 69 cm
*Argillic horizon--zone from 36 to 104 cm
*Aquic conditions--zone from 23 to 150 cm
*Depth to lithologic discontinuity--104 cm

In the Willamette Valley, the Conser soils are on the Winkle geomorphic surface.

Elevation typically is 45 to 185 m in MLRA 2 and 30 to 400 m in MLRA 5. The mean annual precipitation typically is 1000 to 1500 mm in MLRA 2 and 750 to 1500 mm in MLRA 5. The frost-free period generally is 165 to 210 days in MLRA 2. Update projects have been proposed to determine whether the concepts of the Conser series should extend into MLRA 5.

8/2017--This official series description was updated according to SSR01 Technical Note 11--Content and Format of Official Series Descriptions (revised 12/2015). Most of the changes were in formatting; some involved an update of competing series. No major technical changes were made.

ADDITIONAL DATA:
Characterization data--sample number S2015OR039001, National Soil Survey Laboratory, Lincoln, Nebraska

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National Cooperative Soil Survey
U.S.A.