Soil Series Atlas

Tunbridge soil series

Coarse-loamy, isotic, frigid Typic Haplorthods

050cm1 ft2 ftOeOrganic layer · moderately decomposed0–8 cm · 0–3 inOaOrganic layer · highly decomposed8–13 cm · 3–5 inELeached layer13–20 cm · 5–8 inBhsSubsoil · humus build-up, iron andaluminum build-up20–28 cm · 8–11 inBsSubsoil · iron and aluminum build-up28–66 cm · 11–26 inBCSubsoil grading to parent material66–71 cm · 26–28 inRHard bedrock71 cm and deeper · 28+ in050cmOeOrganic layer ·moderately decomposed0–8 cm · 0–3 inOaOrganic layer · highlydecomposed8–13 cm · 3–5 inELeached layer13–20 cm · 5–8 inBhsSubsoil · humusbuild-up, iron andaluminum build-up20–28 cm · 8–11 inBsSubsoil · iron andaluminum build-up28–66 cm · 11–26 inBCSubsoil grading toparent material66–71 cm · 26–28 inRHard bedrock71 cm and deeper · 28+ in
Typical pedon, to scale: 71 cm (28 in), 7 horizons.

Spodosols — acid soils with a subsoil of humus and iron or aluminum

Tunbridge is mapped on 1.94 million acres in 5 states, 37th nationally by area. In New York only three series cover more ground. No other Spodosol series covers as much ground. Outside its main state it also ranks high: the largest of 171 series in New Hampshire and the 2nd-largest of 177 series in Vermont. It is the state soil of Vermont.

Depth
Moderately deep
Drainage
Well drained
Water movement
Moderately high

Compare with another seriesSimilar series in the finder

Where Tunbridge is mapped

1,943,327 acres in 54 soil survey areas, from current SSURGO data.

AlabamaArizonaColoradoFloridaGeorgiaIndianaKansasMaine: 433,891 acresMassachusetts: 108,253 acresMinnesotaNew JerseyNorth CarolinaNorth DakotaOklahomaPennsylvaniaSouth DakotaTexasWyomingConnecticutMissouriWest VirginiaIllinoisNew MexicoArkansasCaliforniaDelawareDistrict of ColumbiaIowaKentuckyMarylandMichiganMississippiMontanaNew Hampshire: 333,703 acresNew York: 611,312 acresOhioOregonTennesseeUtahVirginiaWashingtonWisconsinNebraskaSouth CarolinaIdahoNevadaVermont: 456,168 acresLouisianaRhode Island

Share of all Tunbridge acres

  1. New York32%
  2. Vermont24%
  3. Maine22%
  4. New Hampshire17%
  5. Massachusetts6%

In the field

Drainage

Well drained

Drains fastStays wet

Soil depth

Moderately deep

ShallowDeep

Water movement (Ksat)

Moderately high

SlowFast
Parent material
Glacial till
Landform
Uplands
Major land resource areas
143, 144A, 144B
Type location
Vermont

How it is classified

  1. OrderSpodosols
  2. SuborderOrthods
  3. Great groupHaplorthods
  4. SubgroupTypic Haplorthods
  5. FamilyCoarse-loamy, isotic, frigid Typic Haplorthodscoarse-loamy particle-size classisotic mineralogy classfrigid soil temperature regime

Against other Spodosols

Tunbridge makes up 3.28% of all mapped Spodosols — the 1st largest of 717 series in the order.

Solum thickness (topsoil + subsoil)

71 cm under a median of 79 cm

Depth to the subsoil

20 cm over a median of 15 cm

Depth described

71 cm under a median of 152 cm

Its relatives

10 other established series share the family “Coarse-loamy, isotic, frigid Typic Haplorthods”

  1. Tunbridge1.9 M
  2. Berkshire699 k
  3. Elliottsville391 k
  4. Bangor121 k
  5. Potsdam119 k
  6. Houghtonville116 k
  7. Penquis26 k
  8. Revel6 k
  9. Groveton5 k

Close relatives, at one scale

  1. Tunbridge71 cm · Typic Haplorthods
  2. Kalkaska205 cm · Typic Haplorthods
  3. Chesuncook165 cm · Aquic Haplorthods
  4. Marlow165 cm · Oxyaquic Haplorthods

Horizon by horizon

HorizonLayerDepthThickness
OeOrganic layer: moderately decomposed0–8 cm0–3 in8 cm
OaOrganic layer: highly decomposed8–13 cm3–5 in5 cm
ELeached layer13–20 cm5–8 in7 cm
BhsSubsoil: humus build-up, iron and aluminum build-up20–28 cm8–11 in8 cm
BsSubsoil: iron and aluminum build-up28–66 cm11–26 in38 cm
BCSubsoil grading to parent material66–71 cm26–28 in5 cm
RHard bedrock71– cm28– in—

Sources: USDA–NRCS Official Series Description (revised 2016-01), Soil Classification database and SSURGO. Ranks computed by Soil Series Atlas. Method · Guides