juamarti9@prodigy.net.mx

2006

DEFINITIONS

Soil
Horizon
Buried soil
Epipedon
Soil profile
Soil color
What is a sub-horizon?
Subhorizons
Alfisols
Entisols
Histosols
Inceptisols
Mollisols
Spodosols
Ultisols, Oxisols, Vertisols
Aridisols
Soil Classification example

DOWNLOAD ARIDISOFT
Software to classify aridisols


THE SOIL THAT WE CLASSIFY

"...Soil is the collective term used for the natural bodies, made up
of mineral and organic materials, that cover much of the earth's
surface, contain living matter and can support vegetation out of
doors, and have in places been changed by humanactivity. The
upper limit of soil is air or shallow water.

Its horizontal boundaries are where it grades to deep water or to
barren areas of rock or ice. The lower boundary that separates
soil from not-soil underneth is most difficult to define.

Soil consists of the horizons near the earth's surface which, in
contrast to the underlaying rock material, have been altered by
the interactions, over time between climate, relief, parent
material,s, and living organisms..." (Soil Survey Staff, 1996).



Epipedons | Subhorizons | FAO-UNESCO System | WRB System |