Soil profile Flashcards
What is pedogenesis?
Formation of soil. Combined effect of physical, chemical, biological, and anthropogenic processes on soil parent material, in which horizons are formed.
Why do horizons occur?
Due to weathering. Percolation and illuviation
Which horizons consist of the solum?
A and B
what is A and B horizon on top of?
parent material
A horizon is referred to as?
top soil
B horizon is referred to as?
sub soil
C horizon is referred to as?
regolith
What is the regolith composed of?
weathered soil material on the earth’s surface or loose earth materials above solid rock
What is a “pedon”?
3 dimensional body that depicts soil characteristics
Factors for soil horizon development
1) addition
2) removal
3) transfers
4) transformations
Describe Oi horizon
vegetation is visible to naked eye, freshly fallen litter
Describe Oe horizon
litter undergone advanced stage of composition. Unfermented stage
Describe Oa horizon
any form of matter can’t be recognized with naked eye. humus layer
