Soil Series Atlas

Scobey soil series

Fine, smectitic, frigid Aridic Argiustolls

050100150cm1 ft2 ft3 ft4 ftApTopsoil · plowed0–15 cm · 0–6 inBtSubsoil · clay build-up15–30 cm · 6–12 inBk1Subsoil · lime (carbonate) build-up30–48 cm · 12–19 inBk2Subsoil · lime (carbonate) build-up48–107 cm · 19–42 inBkySubsoil · lime (carbonate) build-up,gypsum107–152 cm · 42–60 in050100150cmApTopsoil · plowed0–15 cm · 0–6 inBtSubsoil · clay build-up15–30 cm · 6–12 inBk1Subsoil · lime(carbonate) build-up30–48 cm · 12–19 inBk2Subsoil · lime(carbonate) build-up48–107 cm · 19–42 inBkySubsoil · lime(carbonate) build-up,gypsum107–152 cm · 42–60 in
Typical pedon, to scale: 152 cm (60 in), 5 horizons.

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

Scobey is mapped on 997,626 acres in 2 states, 176th nationally by area. It is the largest of the 6 established series in its family. Practically all of it, over 99% of its acres, lies in Montana. It is the state soil of Montana.

Depth
Very deep
Drainage
Well drained
Water movement
Slow

Compare with another seriesSimilar series in the finder

Where Scobey is mapped

997,626 acres in 13 soil survey areas, from current SSURGO data.

AlabamaArizonaColoradoFloridaGeorgiaIndianaKansasMaineMassachusettsMinnesotaNew JerseyNorth CarolinaNorth DakotaOklahomaPennsylvaniaSouth DakotaTexasWyoming: 2,152 acresConnecticutMissouriWest VirginiaIllinoisNew MexicoArkansasCaliforniaDelawareDistrict of ColumbiaIowaKentuckyMarylandMichiganMississippiMontana: 995,473 acresNew HampshireNew YorkOhioOregonTennesseeUtahVirginiaWashingtonWisconsinNebraskaSouth CarolinaIdahoNevadaVermontLouisianaRhode Island

Share of all Scobey acres

  1. Montana100%
  2. Wyoming0.2%
  • Rank in the state · share of its mapped soil
  • Montana 12th of 1,390 · 1.46%

In the field

Drainage

Well drained

Drains fastStays wet

Soil depth

Very deep

ShallowDeep

Permeability

Slow

SlowFast
Parent material
Glacial till
Landform
Till plains, hills, moraines
Type location
Montana

How it is classified

  1. OrderMollisols
  2. SuborderUstolls
  3. Great groupArgiustolls
  4. SubgroupAridic Argiustolls
  5. FamilyFine, smectitic, frigid Aridic Argiustollsfine particle-size classsmectitic mineralogy classfrigid soil temperature regime

Against other Mollisols

Scobey makes up 0.23% of all mapped Mollisols — the 51st largest of 7,593 series in the order.

Solum thickness (topsoil + subsoil)

152 cm over a median of 104 cm

Depth to the subsoil

15 cm under a median of 25 cm

Its relatives

5 other established series share the family “Fine, smectitic, frigid Aridic Argiustolls”

  1. Scobey998 k
  2. Tanna371 k
  3. Quilt18 k
  4. Holderness13 k
  5. Morop12 k
  6. Syblon3 k

Close relatives, at one scale

  1. Scobey152 cm · Aridic Argiustolls
  2. Keith152 cm · Aridic Argiustolls
  3. Richfield152 cm · Aridic Argiustolls
  4. Harney152 cm · Typic Argiustolls

Horizon by horizon

HorizonLayerDepthThickness
ApTopsoil: plowed0–15 cm0–6 in15 cm
BtSubsoil: clay build-up15–30 cm6–12 in15 cm
Bk1Subsoil: lime (carbonate) build-up30–48 cm12–19 in18 cm
Bk2Subsoil: lime (carbonate) build-up48–107 cm19–42 in59 cm
BkySubsoil: lime (carbonate) build-up, gypsum107–152 cm42–60 in45 cm

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