' IN SITU STUDY OF SOIL PROCESSES IN AN OXISOL-SPODOSOL SEQUENCE OF AMAZONIA (BRAZIL)

We performed an in situ experiment with the aim of getting evidence for contemporary podzolization in a soil sequence near Manaus, Amazonia, Brazil. Samples of a test-mineral [high cation exchange capacity (CEC) vermiculite], as well as small bags of cation exchange or chelating resins, were inserte