Soil Series Atlas

Aridisols

Soils of dry climates

050100150cm1 ft2 ft3 ft4 ftAbove the subsoilTopsoil and any leached layer0–10 cm · 0–4 inSubsoilFirst B horizon to the base of the solum10–104 cm · 4–41 inBelow the solumParent material or rock, to the mediandepth described104–152 cm · 41–60 in050100150cmAbove the subsoilTopsoil and any leachedlayer0–10 cm · 0–4 inSubsoilFirst B horizon to thebase of the solum10–104 cm · 4–41 inBelow the solumParent material orrock, to the mediandepth described104–152 cm · 41–60 in
The typical Aridisols profile: a schematic drawn to scale from the medians of 2,546 official series descriptions. It is not a real pedon.

Soil order · 2,649 established series in the classification database

Aridisols cover 154.28 million acres of mapped U.S. soils — 9.7% of all series acres, the 6th largest of the twelve orders — across 2,777 mapped series.

Median solum thickness in their typical pedons is 104 cm, with the first B horizon at 10 cm. Official descriptions of Aridisols go down a median 152 cm.

Aridisols among the twelve orders

Share of all acres mapped to a named series, with this order highlighted.

Mollisols 27.3% · Alfisols 17.3% · Entisols 12.3% · Ultisols 11.8% · Inceptisols 11.4% · Aridisols 9.7% · Spodosols 3.7% · Vertisols 2.7% · Histosols 1.9% · Andisols 1.3% · Gelisols 0.5% · Oxisols <0.1%

Guide: The twelve soil orders, measured

Largest Aridisols series

Mapped acres in current SSURGO data, across all series in the order.

  1. Reagan2,252,903 acres2.3 M
  2. Upton1,522,444 acres1.5 M
  3. Gunsight1,304,386 acres1.3 M
  4. Bissett1,058,434 acres1.1 M
  5. Reakor1,044,659 acres1.0 M
  6. Lozier1,024,996 acres1.0 M
  7. Clovis988,429 acres988 k
  8. Nickel943,373 acres943 k
  9. Pastura864,828 acres865 k
  10. Denure853,070 acres853 k

Aridisols on this site

6 Aridisols series profiled here, largest first, drawn at one depth scale.

  1. ReaganUstic Haplocalcids · 2 states
  2. PenistajaUstic Haplargids · 3 states · state soil
  3. ForkwoodUstic Haplargids · 2 states · state soil
  4. OrovadaDurinodic Xeric Haplocambids · 3 states · state soil
  5. Casa GrandeTypic Natrargids · 1 state · state soil
  6. MividaUstic Haplocalcids · 2 states · state soil