Soil series profile

Wyard soil series

Wyard is a somewhat poorly drained soil with a loam surface, mapped on 583,982 acres in 59 counties across 3 states. Hydrologic group B/D.

#449 by mapped area fine-loamy Typic Endoaquolls (Mollisols)

Drainage class
Somewhat poorly drained
100% of mapped acres
Hydrologic group
B/D
48% of mapped acres
Typical topsoil pH
7.0
neutral · range 7.0–7.0
Mapped area
584k
acres in 59 counties, 3 states

Typical Wyard profile

Texture and pH by depth

Typical Wyard soil profile by depth 0 in 20 in 40 in 60 in 0–8 in · Ap · pH 7.0 · 24% clay Loam 8–14 in · A · pH 7.0 · 23% clay Loam 14–18 in · Bw1 · pH 7.2 · 25% clay Loam 18–24 in · Bw2 · pH 7.2 · 25% clay Loam 24–39 in · Bk · pH 7.9 · 26% clay Loam 39–51 in · BCk · pH 7.9 · 26% clay Loam 51–79 in · C · pH 7.9 · 26% clay Loam
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 Wyard horizons (representative values)
Depth Texture pH Clay Sand Organic matter
0–8 in (Ap) Loam 7.0 24% 32% 5.5%
8–14 in (A) Loam 7.0 23% 35% 4%
14–18 in (Bw1) Loam 7.2 25% 38% 3%
18–24 in (Bw2) Loam 7.2 25% 38% 2%
24–39 in (Bk) Loam 7.9 26% 38% 1%
39–51 in (BCk) Loam 7.9 26% 38% 0.3%
51–79 in (C) Loam 7.9 26% 38% 0.3%

Representative values from the most extensive Wyard map unit (Hamerly-Wyard-Tonka complex, 0 to 3 percent slopes, survey area ND095). 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 Wyard soil means for gardens, lawns and septic systems

For gardens

Typical topsoil in Wyard soils is neutral: pH 7.0, the range most vegetables, flowers and lawn grasses prefer.

Loamy topsoil (loam, silt loam and similar) covers 100% of mapped Wyard acres: generally the easiest soil to garden, holding moisture without staying waterlogged. The most common surface texture is loam (96% of mapped Wyard acres).

100% of mapped Wyard acres is somewhat poorly to very poorly drained, so soil stays soggy for long spells after rain and in wet seasons. Raised beds, plants that tolerate wet feet, and not working the soil while wet all help.

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.

A seasonal high water table comes within 18 inches of the surface on 52% of mapped acres, often in spring. Basements, sump pumps and lawns in low spots feel it first.

For a septic system

For conventional septic absorption fields, NRCS rates 100% of the acres in mapped Wyard 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 Wyard soil is found

Mapped acres

Wyard is mapped in North Dakota, Minnesota and South Dakota.

Counties with the most mapped Wyard soil
County Acres Share of county land
Towner County, ND 49,974 7.5%
Renville County, ND 45,892 8.2%
Cavalier County, ND 40,130 4.2%
Bottineau County, ND 38,656 3.6%
Ramsey County, ND 37,618 4.9%
Benson County, ND 33,235 3.7%
Ward County, ND 31,709 2.4%
Barnes County, ND 31,078 3.3%
Nelson County, ND 27,232 4.3%
Foster County, ND 24,854 6.0%
Wells County, ND 21,399 2.6%
Cass County, ND 20,339 1.8%
Stutsman County, ND 19,963 1.4%
Steele County, ND 17,776 3.9%
Griggs County, ND 17,464 3.8%
Rolette County, ND 16,295 2.8%
Walsh County, ND 12,374 1.5%
Pierce County, ND 9,950 1.5%
McHenry County, ND 8,067 0.7%
Eddy County, ND 7,462 1.8%
LaMoure County, ND 7,029 1.0%
Stevens County, MN 6,724 1.9%
Grant County, MN 6,618 1.9%
Dickey County, ND 5,685 0.8%
Sargent County, ND 5,667 1.0%
Grand Forks County, ND 4,195 0.5%
Big Stone County, MN 3,780 1.2%
Sheridan County, ND 3,196 0.5%
Ransom County, ND 2,981 0.5%
Otter Tail County, MN 2,848 0.2%
Traverse County, MN 2,720 0.7%
Richland County, ND 2,641 0.3%
Burke County, ND 2,534 0.4%
Becker County, MN 2,333 0.3%
Mountrail County, ND 2,117 0.2%
McLean County, ND 1,365 0.1%
Edmunds County, SD 1,300 0.2%
Faulk County, SD 1,148 0.2%
Williams County, ND 909 0.1%
Divide County, ND 681 0.1%
McPherson County, SD 681 0.1%
Brown County, SD 559 0.1%
Burleigh County, ND 533 0.1%
Clark County, SD 500 0.1%
Traill County, ND 485 0.1%
Campbell County, SD 482 0.1%
Kidder County, ND 400 0.0%
Spink County, SD 366 0.0%
McIntosh County, ND 349 0.1%
Logan County, ND 336 0.1%
Pembina County, ND 261 0.0%
Walworth County, SD 255 0.1%
Day County, SD 240 0.0%
Emmons County, ND 240 0.0%
Potter County, SD 159 0.0%
Pope County, MN 135 0.0%
Marshall County, SD 51 0.0%
Roberts County, SD 10 0.0%
Wilkin County, MN 0 0.0%

Septic absorption fields

NRCS rating, share of Wyard acres

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

Drainage, water table and flooding

Share of Wyard acres

Depth to seasonal high water table
About 1.5 feet (18 in) (median where reported); within 18 inches on 52% of acres.
Flooding
Not mapped as flooding on most acres.
Slope
Typically 1–2% (median 1%).
Topsoil organic matter
Median 5.5%.

Drainage class

Excessively drained 0%
Somewhat excessively drained 0%
Well drained 0%
Moderately well drained 0%
Somewhat poorly drained 100%
Poorly drained 0%
Very poorly drained 0%
Drainage class across mapped Wyard acres. Scale 0 to 100% of mapped land.
Show as a table
Drainage class across mapped Wyard acres.
CategoryShare of acres
Excessively drained0.0%
Somewhat excessively drained0.0%
Well drained0.0%
Moderately well drained0.0%
Somewhat poorly drained100.0%
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 48%
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 48%
C/D: D as is, C if drained 4%
Hydrologic soil group across mapped Wyard acres. Scale 0 to 100% of mapped land.
Show as a table
Hydrologic soil group across mapped Wyard acres.
CategoryShare of acres
A: fast infiltration (mostly sandy or gravelly)0.0%
B: moderate infiltration0.0%
C: slow infiltration47.7%
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 drained48.0%
C/D: D as is, C if drained4.3%

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 Wyard (component kind "Series") in SSURGO: 583,982 acres.
Method
Shares are by mapped acres of Wyard components. The profile comes from the single largest Wyard component. Full methodology.

Independent reference site. No government affiliation or endorsement.

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