Soil Series Atlas

Soils of Idaho

1,806 soil series mapped on 28.29 million acres

050100150cm1 ft2 ft3 ft4 ft5 ftOiOrganic layer · slightly decomposed0–3 cm · 0–1 inATopsoil3–8 cm · 1–3 inBw1Subsoil · color or structure change8–25 cm · 3–10 inBw2Subsoil · color or structure change25–46 cm · 10–18 in2E/BtMixed leached layer and subsoil · claybuild-up, different parent material46–66 cm · 18–26 in2Bt/E1Mixed subsoil and leached layer · claybuild-up, different parent material66–89 cm · 26–35 in2Bt/E2Mixed subsoil and leached layer · claybuild-up, different parent material89–102 cm · 35–40 in2Btxb1Subsoil · clay build-up, fragipan: denseand brittle, buried, different parentmaterial102–140 cm · 40–55 in2Btxb2Subsoil · clay build-up, fragipan: denseand brittle, buried, different parentmaterial140–175 cm · 55–69 in050100150cmOiOrganic layer ·slightly decomposed0–3 cm · 0–1 inATopsoil3–8 cm · 1–3 inBw1Subsoil · color orstructure change8–25 cm · 3–10 inBw2Subsoil · color orstructure change25–46 cm · 10–18 in2E/BtMixed leached layer andsubsoil · claybuild-up, differentparent material46–66 cm · 18–26 in2Bt/E1Mixed subsoil andleached layer · claybuild-up, differentparent material66–89 cm · 26–35 in2Bt/E2Mixed subsoil andleached layer · claybuild-up, differentparent material89–102 cm · 35–40 in2Btxb1Subsoil · claybuild-up, fragipan:dense and brittle,buried, differentparent material102–140 cm · 40–55 in2Btxb2Subsoil · claybuild-up, fragipan:dense and brittle,buried, differentparent material140–175 cm · 55–69 in
Threebear, to scale.

Andisols — soils formed in volcanic ash and similar material

Its state soil, Threebear, is a minor one locally: 112th of 1,806 series, 0.20% of the mapped soil. First place goes to Portneuf, an Aridisol covering 1.1% of the state’s mapped soil. No order holds a majority; Mollisols lead with 48.4%, ahead of Aridisols at 28.4%. With 1,806 named series in its soil survey, it ranks 5th among the 52 states and territories here.

Atlas series mapped in IdahoGuide: state soils and where series began

Soil orders in Idaho

AlabamaArizonaColoradoFloridaGeorgiaIndianaKansasMaineMassachusettsMinnesotaNew JerseyNorth CarolinaNorth DakotaOklahomaPennsylvaniaSouth DakotaTexasWyomingConnecticutMissouriWest VirginiaIllinoisNew MexicoArkansasCaliforniaDelawareDistrict of ColumbiaIowaKentuckyMarylandMichiganMississippiMontanaNew HampshireNew YorkOhioOregonTennesseeUtahVirginiaWashingtonWisconsinNebraskaSouth CarolinaIdahoNevadaVermontLouisianaRhode Island

Largest series in Idaho

  1. PortneufAridisols · 297,592 acres1.05%
  2. PancheriAridisols · 291,888 acres1.03%
  3. RirieMollisols · 278,333 acres0.98%
  4. RexburgMollisols · 268,759 acres0.95%
  5. PurdamAridisols · 255,524 acres0.90%
  6. KoffgoInceptisols · 234,129 acres0.83%
  7. ZeebarMollisols · 232,557 acres0.82%
  8. PoveyMollisols · 216,655 acres0.77%
  9. PowerAridisols · 214,205 acres0.76%
  10. WickahoneyAlfisols · 184,710 acres0.65%

Atlas series mapped in Idaho

  1. Threebear175 cm · Oxyaquic Udivitrands
  2. Orovada155 cm · Durinodic Xeric Haplocambids