Papers

Summary

Superficial processes involving erosion, transport and deposition of materials, as well as internal pedogenic processes play a role in soil differentiation on the landscape, and are influenced largely by the relief. In this study, we aimed to identify relationships among geomorphic surfaces, hillslope segments, soil erosion and soil attributes of a toposequence in the municipality of Jardinópolis, São Paulo state, Brazil. Three geomorphic surfaces and five hillslope segments were identified and characterized: top, scarp, shoulder, stocking lean and inferior lean. Six trenches were opened along the hillslopes for soil horizon identification, morphologic description and soil classification. We observed soils of sandy texture in geomorphic surface I going to soils of clayey texture in geomorphic surface III. The soil values of SB, CEC and V% increase from G.S. I to G.S. III according to the sandstone-basalt lythosequence. Soil erodibility (K) decreases from geomorphic surface I to III, while losses (A and A*) show contrary behavior, increasing from geomorphic surface I to III, that is, from soils developed in sandstone to basaltic soils