Soil Series Atlas

Reagan soil series

Fine-silty, mixed, superactive, thermic Ustic Haplocalcids

050100cm1 ft2 ft3 ft4 ftA1Topsoil0–8 cm · 0–3 inA2Topsoil8–20 cm · 3–8 inBw1Subsoil · color or structure change20–43 cm · 8–17 inBw2Subsoil · color or structure change43–76 cm · 17–30 inBk1Subsoil · lime (carbonate) build-up76–94 cm · 30–37 inBk2Subsoil · lime (carbonate) build-up94–127 cm · 37–50 in050100cmA1Topsoil0–8 cm · 0–3 inA2Topsoil8–20 cm · 3–8 inBw1Subsoil · color orstructure change20–43 cm · 8–17 inBw2Subsoil · color orstructure change43–76 cm · 17–30 inBk1Subsoil · lime(carbonate) build-up76–94 cm · 30–37 inBk2Subsoil · lime(carbonate) build-up94–127 cm · 37–50 in
Typical pedon, to scale: 127 cm (50 in), 6 horizons.

Aridisols — soils of dry climates

Reagan is mapped on 2.25 million acres in 2 states, 27th nationally by area. No other Aridisol series covers as much ground. Besides it, only Mivida belongs to the great group Haplocalcids in this atlas. It is the largest of the 6 established series in its family.

Depth
Very deep
Drainage
Well drained
Water movement
Moderate

Compare with another seriesSimilar series in the finder

Where Reagan is mapped

2,252,903 acres in 20 soil survey areas, from current SSURGO data.

AlabamaArizonaColoradoFloridaGeorgiaIndianaKansasMaineMassachusettsMinnesotaNew JerseyNorth CarolinaNorth DakotaOklahomaPennsylvaniaSouth DakotaTexas: 1,800,531 acresWyomingConnecticutMissouriWest VirginiaIllinoisNew Mexico: 452,372 acresArkansasCaliforniaDelawareDistrict of ColumbiaIowaKentuckyMarylandMichiganMississippiMontanaNew HampshireNew YorkOhioOregonTennesseeUtahVirginiaWashingtonWisconsinNebraskaSouth CarolinaIdahoNevadaVermontLouisianaRhode Island

Share of all Reagan acres

  1. Texas80%
  2. New Mexico20%
  • Rank in the state · share of its mapped soil
  • Texas 6th of 1,565 · 1.17%
  • New Mexico 19th of 1,301 · 0.74%

In the field

Drainage

Well drained

Drains fastStays wet

Soil depth

Very deep

ShallowDeep

Permeability

Moderate

SlowFast
Parent material
Alluvium, eolian deposits, limestone
Landform
Ridges/interfluves, flats, alluvial fans
Major land resource areas
81A
Type location
Texas

How it is classified

  1. OrderAridisols
  2. SuborderCalcids
  3. Great groupHaplocalcids
  4. SubgroupUstic Haplocalcids
  5. FamilyFine-silty, mixed, superactive, thermic Ustic Haplocalcidsfine-silty particle-size classmixed mineralogy classsuperactive cation-exchange activity classthermic soil temperature regime

Against other Aridisols

Reagan makes up 1.46% of all mapped Aridisols — the 1st largest of 2,777 series in the order.

Solum thickness (topsoil + subsoil)

127 cm over a median of 104 cm

Depth to the subsoil

20 cm over a median of 10 cm

Depth described

127 cm under a median of 152 cm

Its relatives

5 other established series share the family “Fine-silty, mixed, superactive, thermic Ustic Haplocalcids”

  1. Reagan2.3 M
  2. Quay338 k
  3. Stovall168 k
  4. Hoban140 k
  5. Poquita122 k
  6. Conchas98 k

Close relatives, at one scale

  1. Reagan127 cm · Ustic Haplocalcids
  2. Mivida152 cm · Ustic Haplocalcids

Horizon by horizon

HorizonLayerDepthThickness
A1Topsoil0–8 cm0–3 in8 cm
A2Topsoil8–20 cm3–8 in12 cm
Bw1Subsoil: color or structure change20–43 cm8–17 in23 cm
Bw2Subsoil: color or structure change43–76 cm17–30 in33 cm
Bk1Subsoil: lime (carbonate) build-up76–94 cm30–37 in18 cm
Bk2Subsoil: lime (carbonate) build-up94–127 cm37–50 in33 cm

Sources: USDA–NRCS Official Series Description (revised 2016-09), Soil Classification database and SSURGO. Ranks computed by Soil Series Atlas. Method · Guides