Survey of information and building of a database of the erodibility for the soils classes in the São Paulo State.

Abstract

The aim of this paper is to survey the available information and elaborate a database of the soil erodibility for the soil classes that occur along the State of São Paulo. The soil classes were established according to the pedological map of São Paulo State. It was a review of the bibliographic data on erodibility value (K factor of the Universal Soil Loss Equation), as well as other additional information. The average and standard deviation of the available erodibility values were determined according to the number of data. The Acrisols, Arenosols and Ferralsols represented 74% of the values found. The Histosols presented the highest value of the K factor (0.0610 t.ha-1.MJ-1.mm-1), while the Planosols presented the lowest value (0.0097 t.ha-1.MJ-1.mm-1). The value of the K factor of the Acrisols, Cambisols, Phaeozens, Podzols, Gleisols, Arenosols and Histosols were interpreted as being of high erodibility. The Ferralsols and Nitosols presented values interpreted as medium erodibility and the Planosols were considered as the lowest erodibility. The results indicate that the soils of the São Paulo State have, at mostly, an erodibility considered high.