Agriculture Reference
In-Depth Information
Figure 11.2
A map of Brazil showing the main distribution of Vertissolos.
Grouping of soils with spodic horizon below an eluvial E horizon or surface
H horizon less than 40 cm thick or subjacent to any other kind of A horizon. The soil is characterized
by a predominance of podzolization process showing eluviation, followed by accumulation of
aluminum compounds along with humic acids, with or without iron.
This class includes mainly those soils that have been previously identiÝed as Podzol, including
the hydromorphic ones.
The geographical distribution of this soil class secluded from the 1:5,000,000 scale of the
Brazilian soil map is shown in Figure 11.3. It comprises 136,191 km
EspodossolosÐ
corresponding to 1.6% of
2
the country.
AlissolosÐ
Soils having a textural B or nitic horizon with CEC equal to or higher than 20 cmol
/kg
c
of clay and aluminum saturation equal to or more than 50% and extractable aluminum Al
equal
3+
to or more than 4.0 cmol
/kg of soil. Plinthic and/or gley horizons, if present, they are below the
c
Figure 11.3
A map of Brazil showing the main distribution of Espodossolos.
