TVMSC Soil Classifications (Mrs. Poppenga's Earth Science)

Clay rich soil; expansion and contraction present

Volcanic soil; immature

High humidity; immature

Permafrost soil; slow formation; immature

Humus- rich prairie soil; excellent fertility: Imagine Molly with a bonnet on the prairie ;-)

High humidity; sandy; coniferous forests; has a light colored horizon of leached material

Rocky slopes or river deposits; high to low productivity

Tropical forest soil; heavily leached, rich in Fe and Al

Bog or swamp soil; peat; high organics

Clay soils; extensive leaching and poor soil quality; humid climates

Dry places; accumulation of CaCO3; few organics

Rich in Fe and Al; boreal or deciduous forests; fertile