Soil Series Atlas

Soils of Illinois

582 soil series mapped on 32.00 million acres

050100150cm1 ft2 ft3 ft4 ftApTopsoil · plowed0–18 cm · 0–7 inATopsoil18–36 cm · 7–14 inBASubsoil grading from topsoil36–48 cm · 14–19 inBgSubsoil · gleyed: gray from wetness48–64 cm · 19–25 inBtg1Subsoil · clay build-up, gleyed: grayfrom wetness64–81 cm · 25–32 inBtg2Subsoil · clay build-up, gleyed: grayfrom wetness81–104 cm · 32–41 in2Btg3Subsoil · clay build-up, gleyed: grayfrom wetness, different parent material104–119 cm · 41–47 in2CgParent material · gleyed: gray fromwetness, different parent material119–152 cm · 47–60 in050100150cmApTopsoil · plowed0–18 cm · 0–7 inATopsoil18–36 cm · 7–14 inBASubsoil grading fromtopsoil36–48 cm · 14–19 inBgSubsoil · gleyed: grayfrom wetness48–64 cm · 19–25 inBtg1Subsoil · claybuild-up, gleyed: grayfrom wetness64–81 cm · 25–32 inBtg2Subsoil · claybuild-up, gleyed: grayfrom wetness81–104 cm · 32–41 in2Btg3Subsoil · claybuild-up, gleyed: grayfrom wetness, differentparent material104–119 cm · 41–47 in2CgParent material ·gleyed: gray fromwetness, differentparent material119–152 cm · 47–60 in
Drummer, to scale.

Mollisols — soils with a thick, dark, organic-rich topsoil

Illinois’s state soil, Drummer, is also its most extensive series, with 1,343,362 acres (4.2% of the mapped soil). No order holds a majority; Mollisols lead with 47.0%, ahead of Alfisols at 44.3%.

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

Soil orders in Illinois

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

Largest series in Illinois

  1. DrummerMollisols · 1,343,362 acres4.20%
  2. IpavaMollisols · 1,088,696 acres3.40%
  3. HickoryAlfisols · 1,077,149 acres3.37%
  4. BlufordAlfisols · 957,253 acres2.99%
  5. SableMollisols · 903,532 acres2.82%
  6. RozettaAlfisols · 808,414 acres2.53%
  7. OscoMollisols · 723,729 acres2.26%
  8. FlanaganMollisols · 658,109 acres2.06%
  9. AvaAlfisols · 581,477 acres1.82%
  10. CisneAlfisols · 543,939 acres1.70%

Atlas series mapped in Illinois

  1. Drummer152 cm · Typic Endoaquolls
  2. Miami200 cm · Oxyaquic Hapludalfs
  3. Tama152 cm · Typic Argiudolls
  4. Crider254 cm · Typic Paleudalfs
  5. Menfro203 cm · Typic Hapludalfs
  6. Berks84 cm · Typic Dystrudepts
  7. Clarksville152 cm · Typic Paleudults
  8. Blount200 cm · Aeric Epiaqualfs
  9. Fayette185 cm · Typic Hapludalfs
  10. Weikert46 cm · Lithic Dystrudepts