PLS 366 Module 1

Mollisol (Location and abbreviation)

Grassland (oll)

Alfisol (Location and abbreviation)

Deciduous forest (Alf)

Spodosol (Location and abbreviation)

Coniferous forest (od)

Ultisols (Location and abbreviation)

Tropical Regions- Last (ult)

Oxisols (Location and abbreviation)

Highly weathered, tropical (ox)

Entisols (Location and abbreviation)

Active floodplains, poor climate (Ent)

Inceptisols (Location and abbreviation)

Tundra, mountains (ept)

Andisols (description and abbreviation)

Dry (and)

Gelisols (description and abbreviation)

Cold/ permafrost (el)

Vertisols (Location and abbreviation)

Oklahoma/ Texas (ert)

Aridisols (description and abbreviation)

Dry (id)

Histosols (Location and abbreviation)

Florida (ist)

Argillic

“t” Bt horizon, illuvial

Cambic

“W” Bw, weakly developed B horizon

Spodic

“H” or “s” illuvial, B horizons; designated Bh,Bs,Bhs

Fragipan

“X” designated by Bx or Cx, weakly counted, 750% of upland soils in the US

Oxic

“O” Bo, highly weathered, low base saturation

Soil Horizon O

1st Layer; Organic Surface Layer

Soil Horizon A

Layer 2; Mineral, or below O

Soil Horizon E

Layer 3 Eluvial horizon; loss of Organic Matter, clay, Iron and Aluminum

Soil Horizon B

Layer 4; Subsurface horizon of clay / iron

Soil Horizon C

Layer 5; Relatively unweathered; unconsolidated material

Soil Horizon R

Layer 6; consolidated bedrock

Moisture: Most wet; most dry

Aquic; Xeric

Temperature: Most Cold; Most Hot

Cryic; thermic

Eolian

Loess deposits, important to US and Ky Soils; wind carried silts

Glacial

Glacial till and glacial washout

Colluvial

Usually rocky (physical>chemical)

Alluvial

Floodplains, sediment deposition

Marine

“Coastal plains”

Lacustine

Clayey soils formed in old lake beds

Mollic

Found in grasslands, >= 50% base saturation, high OM

Umbric

Acidic Mollic epipdeon, <= 50% base saturation, more weathered

Ochric

Light colored, low OM, too thin for mollic or umbric

Histic

High water and nutrient holding, found in Florida

Melanic

Surface mineral horizon is black from high OM, volcanic Ash

Colluvial

Gravity

Alluvial

Deposited by streams/ rivers

Marine

Deposited by oceans