This region of the coastal plain is characterized as an intermediate instability zone, usually covered by Podsol
sandy soils with a ferruginous layer (SILVEIRA et al., 2005), flooded by fluvial influence (IBGE, 1992).
Phillips (2006) used Hydrus-2D for simulating cation exchange of [K.sup.+] and N[H.sub.4.sup.+] and nitrification in undisturbed cores of a Vertosol and a Podsol
. Nitrogen transformation and leaching was simulated well, but agreement between measured and simulated [K.sup.+] leaching from the Podsol
was not satisfactory.
Gjems studied clay fraction (<2 [micro]m) by means of X-ray diffraction analysis in 670 samples from 222 soil profiles (A, B, C horizons) of podsols
, brown earth, semipodsol, iron humus podsol
and humus podsol
from different geological formations sampled in Norway, Sweden, Finland, and Denmark.
Die stratigraphische Abfolge besteht aus einer dunnen Oberbodenschicht, unter der ein Podsol
aus grauem Sand von etwa 0,1 m Starke liegt, darunter folgt die bis zu 0,2 m dicke Kulturschicht aus orangefarbenem Sand mit stark rot gefarbten Linsen.
The precipitation in the coniferous boreal forest was sufficient to produce leached greyish soil called podsol
(in modern categories in the order Spodosol) or, in the west with the admixture of aspen in the forest, an Alfisol; scattered across the boreal margin were patches of wet organic soils classified as Histosols (De Blij et al.