Soil Series Atlas

Spodosols

Acid soils with a subsoil of humus and iron or aluminum

050100150cm1 ft2 ft3 ft4 ftAbove the subsoilTopsoil and any leached layer0–15 cm · 0–6 inSubsoilFirst B horizon to the base of the solum15–79 cm · 6–31 inBelow the solumParent material or rock, to the mediandepth described79–152 cm · 31–60 in050100150cmAbove the subsoilTopsoil and any leachedlayer0–15 cm · 0–6 inSubsoilFirst B horizon to thebase of the solum15–79 cm · 6–31 inBelow the solumParent material orrock, to the mediandepth described79–152 cm · 31–60 in
The typical Spodosols profile: a schematic drawn to scale from the medians of 660 official series descriptions. It is not a real pedon.

Soil order · 702 established series in the classification database

Spodosols cover 59.20 million acres of mapped U.S. soils — 3.7% of all series acres, the 7th largest of the twelve orders — across 717 mapped series.

Median solum thickness in their typical pedons is 79 cm, with the first B horizon at 15 cm. Official descriptions of Spodosols go down a median 152 cm.

Spodosols 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 Spodosols series

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

  1. Tunbridge1,943,327 acres1.9 M
  2. Peru1,665,793 acres1.7 M
  3. Lyman1,566,565 acres1.6 M
  4. Myakka1,404,907 acres1.4 M
  5. Rubicon1,245,976 acres1.2 M
  6. Telos1,203,739 acres1.2 M
  7. Leon1,120,780 acres1.1 M
  8. Kalkaska1,035,444 acres1.0 M
  9. Becket976,967 acres977 k
  10. Marlow965,697 acres966 k

Spodosols on this site

5 Spodosols series profiled here, largest first, drawn at one depth scale.

  1. TunbridgeTypic Haplorthods · 5 states · state soil
  2. MyakkaAeric Alaquods · 1 state · state soil
  3. KalkaskaTypic Haplorthods · 2 states · state soil
  4. MarlowOxyaquic Haplorthods · 5 states · state soil
  5. ChesuncookAquic Haplorthods · 2 states · state soil