Soil Resources (Sub-Surface Horizons)
Contains illuvial clay (Bt)
Same as argillic but must contain 15% exchangeable NA
Contains Al, Fe, and other oxides and clay minerals
Only found in acid sandy soils with high rainfall
Found below E horizon
Very weathered and only contains Fe, Al oxides, and clay minerals
Found in tropical soils.
Not weathered enough to be argillic
Contains an accumulation of CaCO3
Hard pan that is brittle when when and very hard when dry
Dark in color because of high organic matter.
Low base satuation
Low in clay and oxides