Proposition of models for erodibility estimation of Brazilian Oxisols

Abstract

The existent methods for indirect determination of erodibility have not been adequate when applied to tropical soils, mainly in relation to Brazilian (Oxisols). So, this study aimed to develop models for determination of erodibility of this soils group, from morphological, physical, chemical and mineralogical variables of the soil. In this way, using 19 latosols from the various Brazilian geographical regions, 129 determinations (independent variables) were made, whose results were submitted to multiple linear regression analyses in backward using the SAS program, correlating them with the erodibility directly obtained in the field through soil losses plots (dependent variable). It was possible to develop five models, with increasing degrees of complexity and precision, for the estimation of the erodibility of Brazilian latosols, involving 37 determinations that presented significance.