Soil series profile

Jory soil series

Jory is a well drained soil with a silty clay loam surface, mapped on 218,239 acres in 9 counties in OR. Hydrologic group C.

#1621 by mapped area fine Xeric Palehumults (Ultisols)

Drainage class
Well drained
100% of mapped acres
Hydrologic group
C
100% of mapped acres
Typical topsoil pH
5.5
strongly acidic · range 5.5–5.6
Mapped area
218k
acres in 9 counties, 1 state

Typical Jory profile

Texture and pH by depth

Typical Jory soil profile by depth 0 in 10 in 20 in 30 in 40 in 50 in 0–13 in · H1 · pH 5.5 · 34% clay Silty clay loam 13–60 in · H2 · pH 5.0 · 53% clay Silty clay
Depth to scale. More strongly shaded layers hold more clay. Horizon names are the soil survey's (A = topsoil, B = subsoil, C = parent material).
Show as a table
Typical Jory horizons (representative values)
Depth Texture pH Clay Sand Organic matter
0–13 in (H1) Silty clay loam 5.5 34% 19% 4.5%
13–60 in (H2) Silty clay 5.0 53% 3% 1.25%

Representative values from the most extensive Jory map unit (Jory silty clay loam, 2 to 8 percent slopes, survey area OR610). Other map units of this series vary within the series range.

Hands holding dark garden soil
Stock photo for illustration, not a sample of this soil series. Credit on the Sources & method page.

What this means

What Jory soil means for gardens, lawns and septic systems

For gardens

Typical topsoil in Jory soils is strongly acidic: pH 5.5 (most land between 5.5 and 5.6). Most vegetables and lawn grasses do best around 6.0 to 7.0, so lime is often needed; blueberries, azaleas and rhododendrons like it as it is.

Loamy topsoil (loam, silt loam and similar) covers 100% of mapped Jory acres: generally the easiest soil to garden, holding moisture without staying waterlogged. The most common surface texture is silty clay loam (97% of mapped Jory acres).

100% of mapped Jory acres is moderately well to excessively drained, which suits most garden plants.

For lawns and yards

On 100% of mapped acres, rain soaks in slowly (hydrologic groups C and D, including dual groups that are D until drained). Expect runoff and puddles after heavy rain: core-aerate compacted lawns and keep ground sloping away from foundations.

For a septic system

For conventional septic absorption fields, NRCS rates 100% of the acres in mapped Jory soils very limited, 0% somewhat limited and 0% not limited.

Where the soil is very limited (slow permeability, a high water table, flooding, shallow bedrock or steep slopes), alternative systems such as mound or sand-filter designs are common and cost more.

Only a licensed site evaluation or perc test at the actual lot decides whether a system is allowed and which design.

Generated from the mapped numbers above using fixed rules, not a site visit. See how these notes are written.

Where Jory soil is found

Mapped acres

Jory is mapped in Oregon.

Counties with the most mapped Jory soil
County Acres Share of county land
Clackamas County, OR 47,214 8.5%
Benton County, OR 44,088 11.4%
Polk County, OR 31,815 7.6%
Marion County, OR 22,286 4.4%
Yamhill County, OR 21,014 4.8%
Douglas County, OR 17,875 1.0%
Linn County, OR 15,589 1.9%
Lane County, OR 14,026 0.9%
Washington County, OR 2,867 0.7%

Septic absorption fields

NRCS rating, share of Jory acres

Not limited 0%
Somewhat limited 0%
Very limited 100%
Septic tank absorption field rating across mapped Jory acres. Scale 0 to 100% of mapped land.
Show as a table
Septic tank absorption field rating across mapped Jory acres.
CategoryShare of acres
Not limited0.0%
Somewhat limited0.0%
Very limited100.0%

Drainage, water table and flooding

Share of Jory acres

Depth to seasonal high water table
None reported within about 6.5 feet (median where reported).
Flooding
Not mapped as flooding on most acres.
Slope
Typically 5–25% (median 16%).
Topsoil organic matter
Median 4.5%.

Drainage class

Excessively drained 0%
Somewhat excessively drained 0%
Well drained 100%
Moderately well drained 0%
Somewhat poorly drained 0%
Poorly drained 0%
Very poorly drained 0%
Drainage class across mapped Jory acres. Scale 0 to 100% of mapped land.
Show as a table
Drainage class across mapped Jory acres.
CategoryShare of acres
Excessively drained0.0%
Somewhat excessively drained0.0%
Well drained100.0%
Moderately well drained0.0%
Somewhat poorly drained0.0%
Poorly drained0.0%
Very poorly drained0.0%

Hydrologic soil group

A: fast infiltration (mostly sandy or gravelly) 0%
B: moderate infiltration 0%
C: slow infiltration 100%
D: very slow infiltration (clayey, shallow or wet) 0%
A/D: D as is, A if drained 0%
B/D: D as is, B if drained 0%
C/D: D as is, C if drained 0%
Hydrologic soil group across mapped Jory acres. Scale 0 to 100% of mapped land.
Show as a table
Hydrologic soil group across mapped Jory acres.
CategoryShare of acres
A: fast infiltration (mostly sandy or gravelly)0.0%
B: moderate infiltration0.0%
C: slow infiltration100.0%
D: very slow infiltration (clayey, shallow or wet)0.0%
A/D: D as is, A if drained0.0%
B/D: D as is, B if drained0.0%
C/D: D as is, C if drained0.0%

Sources & data dates

Source
USDA NRCS Soil Survey Geographic Database (SSURGO), queried through Soil Data Access. Public domain.
Data date
SSURGO as published on November 3, 2026 (most recent survey area update October 26, 2026). NRCS refreshes SSURGO each October.
Scope
All map unit components named Jory (component kind "Series") in SSURGO: 218,239 acres.
Method
Shares are by mapped acres of Jory components. The profile comes from the single largest Jory component. Full methodology.

Independent reference site. No government affiliation or endorsement.

Full narrative description: USDA Official Soil Series Description for Jory.