Soil Resources (Sub-Surface Horizons)

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created 6 years ago by brycebamsey
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updated 6 years ago by brycebamsey
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1

Argillic Horizon

Contains illuvial clay (Bt)

2

Natric Horizon

Same as argillic but must contain 15% exchangeable NA

3

Spodic Horizon

Contains Al, Fe, and other oxides and clay minerals
Only found in acid sandy soils with high rainfall
Found below E horizon

4

Oxic Horizon

Very weathered and only contains Fe, Al oxides, and clay minerals
Found in tropical soils.
Low pH

5

Cambic Horizon

Weakly developed
Not weathered enough to be argillic

6

Calcic Horizion

Contains an accumulation of CaCO3

7

Kandic Horizon

Highly weathered
Low CEC

8

Fragipan Horizon

Hard pan that is brittle when when and very hard when dry

9

Sombric Horizon

Illuvial
Dark in color because of high organic matter.
Low base satuation

10

Albic Horizon

Light-covered
Eluvial horizon
Low in clay and oxides