Soil Series Atlas

Smithdale soil series

Fine-loamy, siliceous, subactive, thermic Typic Hapludults

050100150200cm1 ft2 ft3 ft4 ft5 ft6 ftATopsoil0–5 cm · 0–2 inELeached layer5–28 cm · 2–11 inBt1Subsoil · clay build-up28–99 cm · 11–39 inBt2Subsoil · clay build-up99–127 cm · 39–50 inBC1Subsoil grading to parent material127–160 cm · 50–63 inBC2Subsoil grading to parent material160–211 cm · 63–83 in050100150200cmATopsoil0–5 cm · 0–2 inELeached layer5–28 cm · 2–11 inBt1Subsoil · clay build-up28–99 cm · 11–39 inBt2Subsoil · clay build-up99–127 cm · 39–50 inBC1Subsoil grading toparent material127–160 cm · 50–63 inBC2Subsoil grading toparent material160–211 cm · 63–83 in
Typical pedon, to scale: 211 cm (83 in), 6 horizons.

Ultisols — strongly weathered, leached soils with a clay-enriched subsoil

With 5.68 million acres mapped, Smithdale is the 3rd-largest of 24,791 U.S. soil series. No series covers more of Mississippi: it accounts for 11.1% of the state’s mapped soil. Among the 1,278 mapped Ultisols it is the 2nd-largest. Outside its main state it also ranks high: the 2nd-largest of 439 series in Alabama and the 3rd-largest of 449 series in Tennessee.

Depth
Very deep
Drainage
Well drained
Water movement
Moderate

Compare with another seriesSimilar series in the finder

Where Smithdale is mapped

5,681,521 acres in 171 soil survey areas, from current SSURGO data.

Alabama: 1,277,360 acresArizonaColoradoFlorida: 106 acresGeorgiaIndianaKansasMaineMassachusettsMinnesotaNew JerseyNorth CarolinaNorth DakotaOklahoma: 11,671 acresPennsylvaniaSouth DakotaTexas: 12,678 acresWyomingConnecticutMissouriWest VirginiaIllinoisNew MexicoArkansas: 323,573 acresCaliforniaDelawareDistrict of ColumbiaIowaKentucky: 30,347 acresMarylandMichiganMississippi: 3,016,448 acresMontanaNew HampshireNew YorkOhioOregonTennessee: 662,160 acresUtahVirginiaWashingtonWisconsinNebraskaSouth CarolinaIdahoNevadaVermontLouisiana: 347,178 acresRhode Island

Share of all Smithdale acres

  1. Mississippi53%
  2. Alabama22%
  3. Tennessee12%
  4. Louisiana6%
  5. Arkansas6%
  6. Kentucky0.5%
  7. Texas0.2%
  8. Oklahoma0.2%
  9. Florida<0.1%

In the field

Drainage

Well drained

Drains fastStays wet

Soil depth

Very deep

ShallowDeep

Permeability

Moderate

SlowFast

Of the 26 atlas series that have moderate permeability, this is the largest.

Parent material
Marine/coastal plain sediments
Landform
Hills, ridges/interfluves, uplands, coastal plains
Type location
Mississippi

How it is classified

  1. OrderUltisols
  2. SuborderUdults
  3. Great groupHapludults
  4. SubgroupTypic Hapludults
  5. FamilyFine-loamy, siliceous, subactive, thermic Typic Hapludultsfine-loamy particle-size classsiliceous mineralogy classsubactive cation-exchange activity classthermic soil temperature regime

Against other Ultisols

Smithdale makes up 3.00% of all mapped Ultisols — the 2nd largest of 1,278 series in the order.

Solum thickness (topsoil + subsoil)

211 cm over a median of 142 cm

Depth to the subsoil

28 cm over a median of 23 cm

Depth described

211 cm over a median of 178 cm

Its relatives

4 other established series share the family “Fine-loamy, siliceous, subactive, thermic Typic Hapludults”

  1. Smithdale5.7 M
  2. Emporia534 k
  3. Hartsells495 k
  4. Kempsville208 k
  5. Fruitdale41 k

Close relatives, at one scale

  1. Smithdale211 cm · Typic Hapludults
  2. Greenwich183 cm · Typic Hapludults
  3. Sassafras178 cm · Typic Hapludults
  4. Downer203 cm · Typic Hapludults
  5. Gilpin79 cm · Typic Hapludults
  6. Shelocta152 cm · Typic Hapludults

Horizon by horizon

HorizonLayerDepthThickness
ATopsoil0–5 cm0–2 in5 cm
ELeached layer5–28 cm2–11 in23 cm
Bt1Subsoil: clay build-up28–99 cm11–39 in71 cm
Bt2Subsoil: clay build-up99–127 cm39–50 in28 cm
BC1Subsoil grading to parent material127–160 cm50–63 in33 cm
BC2Subsoil grading to parent material160–211 cm63–83 in51 cm

Sources: USDA–NRCS Official Series Description (revised 2014-12), Soil Classification database and SSURGO. Ranks computed by Soil Series Atlas. Method · Guides