Horizons and Subhorizons

For Final exam. Soil Science horizon and subhorizon descriptions.

31 cards   |   Total Attempts: 188
  

Cards In This Set

Front Back
O Horizon
Organic horizon
A Horizon
Top mineral layer
E Horizon
Eluviation: process of leaching or removal (lighter color than A; clay and o.m. removed)
B Horizon
Illuviation: process of accumulation from above horizons (clay and o.m.)
C Horizon
Parent material (unconsolidated)
R Horizon
Consolidated rock
A subhorizon
Highly decomposed o.m.
B subhorizon
Buried layer
C subhorizon
Concretions
D subhorizon
Physical root restriction
E subhorizon
Intermediately decomposed o.m.
F subhorizon
Frozen soil
G subhorizon
Gleying: presence of FeO x H2O (bluish-grey color)
H subhorizon
Humus accumulation
I subhorizon
Slightly decomposed o.m.