LOCATION RONY                    WA

Established Series
IRD. DRU/EED
07/2017

RONY SERIES

Landscape--river valleys
Landform--alluvial fans, stream terraces
Slope--0 to 15 percent
Parent material--alluvium
Mean annual precipitation--about 1500 mm
Mean annual air temperature--about 11 degrees C
Depth class--very deep
Drainage class--somewhat poorly drained
Soil moisture regime--aquic
Soil temperature regime--mesic
Soil moisture subclass--xeric

TAXONOMIC CLASS: Fine-silty, isotic, mesic Aquandic Endoaqualfs

TYPICAL PEDON: Rony silty loam in an area of hayland (When described on September 30, 2015, the soil was dry to a depth of 30 cm and moist below that depth.)

A--0 to 10 cm; silt loam, very dark grayish brown (10YR 3/2) moist, brown (10YR 4/3) dry; moderate fine granular structure; slightly hard, friable, slightly sticky and slightly plastic; many very fine, common fine, and few medium roots; common fine and few medium irregular pores; strongly acid (pH 5.4); abrupt smooth boundary

AB--10 to 32 cm; silt loam, dark brown (10YR 3/3) moist, pale brown (10YR 6/3) dry; moderate medium subangular blocky structure; hard, firm, moderately sticky and moderately plastic; common very fine and fine roots; few fine tubular and few medium irregular pores; moderately acid (pH 5.6); clear wavy boundary

Btg1--32 to 105 cm; silty clay loam, brown (10YR 4/3) moist, pale brown (10YR 6/3) dry; strong fine subangular blocky structure; moderately hard, friable, moderately sticky and moderately plastic; common very fine and few fine roots; many very fine and few fine and medium tubular pores; 10 percent faint clay films on faces of peds; 5 percent fine prominent strong brown (7.5YR 4/6) masses of oxidized iron lining pores and 10 percent fine distinct gray (10YR 5/1) iron depletions lining pores; moderately acid (pH 6.0); clear wavy boundary

Btg2--105 to 150 cm; silty clay loam, gray (10YR 5/1) and brown (10YR 4/3) moist, light gray (10YR 7/2) and pale brown (10YR 6/3) dry; strong fine subangular blocky structure; moderately hard, friable, moderately sticky and moderately plastic; few very fine roots; common very fine and few fine tubular pores; 10 percent faint clay films on faces of peds; 20 percent fine prominent strong brown (7.5YR 4/6) masses of oxidized iron lining pores; moderately acid (pH 6.0)

TYPE LOCATION: Grays Harbor County, Washington, about 2.5 km southwest of Porter; about 470 m north and 500 m east of the southwest corner of section 29, T. 17 N., R. 5 W., Willamette Meridian; Malone, Washington, U.S. Geological Survey quadrangle; latitude 46.9293810 degrees north, longitude 123.3417530 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
Argillic horizon thickness--105 to 120 cm or more
Base saturation by sum of cations--more than 35 percent throughout argillic horizon
Depth to aquic conditions--30 to 50 cm

All mineral horizons
*Content of coarse silt to very coarse sand in fine-earth fraction--30 percent or more
*Volcanic glass content--5 to 15 percent
*Ammonium oxalate extractable Al plus 1/2 Fe times 60 plus volcanic glass--30 or more
*Reaction (pH)--5.1 to 6.5

Particle-size control section
*Clay content (weighted average)--18 to 35 percent
*Sand content--0 to 15 percent

A horizon
Value--2 or 3 moist, 3 to 5 dry
Chroma--2 or 3 moist or dry
Fine-earth texture--silt loam, silty clay loam, loam
Clay content--10 to 35 percent
Thickness--10 to 20 cm

AB horizon
Value--5 or 6 dry
Fine-earth texture--silt loam, silty clay loam, loam
Clay content--10 to 35 percent
Thickness--20 to 30 cm

Btg1 horizon
Hue--10YR, 2.5Y
Value--3 to 5 moist, 4 to 7 dry
Chroma--2 to 6 moist, 2 to 4 dry
Fine-earth texture--silty clay loam, silt loam
Clay content--18 to 35 percent
Thickness--15-50 cm

Btg2 horizon
Hue--10YR, 2.5Y
Value--3 to 6 moist, 4 to 7 dry
Chroma--1 to 3 moist, 2 to 4 dry
Fine-earth texture--silty clay loam, silt loam, silty clay
Clay content--18 to 50 percent

COMPETING SERIES: None

GEOGRAPHIC SETTING:
Elevation--5 to 45 m
Mean annual precipitation--1200 to 1800 mm
Mean annual air temperature--10 to 11 degrees C
Frost-free period--150 to 200 days

GEOGRAPHICALLY ASSOCIATED SOILS:
Gate--no aquic conditions within 75 cm of the soil surface; in convex to linear positions of similar landforms
Delezene--less than 18 percent clay in particle-size control section; no aquic conditions within 100 cm of the soil surface; in convex positions of outwash terraces
Centralia--greater than 15 percent sand in particle-size control section; no aquic conditions; on convex hillslopes
Rennie--aquic conditions to the soil surface; frequently flooded; frequently ponded; in concave depressions and backswamps
Grandmound, Daviscreek--greater than 35 percent rock fragments throughout particle-size control section; in convex to linear positions of outwash terraces
Huttula--greater than 35 percent rock fragments in particle-size control section; occasionally flooded; in concave to linear positions of outwash terraces

DRAINAGE AND SATURATED HYDRAULIC CONDUCTIVITY:
Drainage class--somewhat poorly drained
Depth to apparent seasonal water table--30 to 50 cm at times in November through April
Saturated hydraulic conductivity (Ksat)--moderately high or high in A and AB horizons, moderately low to moderately high in Btg horizon

USE AND VEGETATION:
Use--hay production and livestock grazing in cleared areas, forest production, wildlife habitat
Native vegetation--Douglas-fir, western redcedar, bigleaf maple, red alder, salmonberry, common snowberry, vine maple, red elderberry, Indian plum, red huckleberry, western swordfern, ladyfern, white insideout flower, piggyback plant

DISTRIBUTION AND EXTENT: Western Washington; MLRA 2; small extent

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

SERIES ESTABLISHED: Grays Harbor County, Washington; 2016; name from Rony, Washington

REMARKS:
Diagnostic horizons and other features in this pedon
*Particle-size control section--zone from 32 to 82 cm
*Ochric epipedon
*Argillic horizon--zone from 32 to 150 cm
*Aquic conditions--zone from 32 to 150 cm
*Endosaturation--zone from 32 to 150 cm
*Redoximorphic depletions with chroma of 2 or less--zone from 32 to 150 cm

4/2017--The Rony series was proposed as a result of an update project. The official series description was developed according to SSR01 Technical Note--Content and Format of Official Series Descriptions (revised 12/2015). Further field investigation and laboratory sampling of alluvial fans and terraces at the interface of hills and lowlands in MLRA 2 is recommended to determine the distribution and influence of volcanic ash. The Galvin series should be evaluated concurrently to determine if areas mapped in MLRA 2 have an admixture of volcanic glass and could be correlated to the Rony series.

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National Cooperative Soil Survey
U.S.A.