Soil Formation Flashcards
1
Q
Horizons
A
ORGANIC LAYER. Surface.
litter layer
dead plants/animal material
food for earth worms
TOPSOIL. Top 10-40cm
decomposed organic matter mixed with mineral content
Dark
heats well
SUBSOIL. Below cultivated layer, down to parent rock
Minimal organic matter
Mostly mineral
Poor drainage
PARENT ROCK Material not yet sufficiently abraded to form soil
2
Q
Soil formation: texture
A
