Mln. Silva et al., Evaluation of indirect methods for determination of erodibility of Brazilian latosols (Oxisols), PESQ AGROP, 35(6), 2000, pp. 1207-1220
There are three ways for determining the soil erodibility (K-factor). The f
irst one includes the K-factor determination at field conditions, under nat
ural rainfall, which is expensive and time consuming. The second method is
similar to the first one, but it is based upon the quantification of K-fact
or as a function of soil losses and the erosivity factor, under simulated r
ainfall. The third method is based upon multiple regressions which include
as independent variables soil attributes correlated with the K-factor obtai
ned by the two former methods, considered as standards. The lack of basic d
ata and the indefinition of the best method For the determination of the in
directly determined erodibility, which would allow to frame the soils into
erosion resistance classes, constitute problems in the utilization of these
indirect methods, particularly for the Brazilian Latosols (Oxisols). There
fore, this study aimed to determine the erodibility of these soils by indir
ect methods and the evaluation of the correlation between these methods and
the direct ones. None of the tested methods allowed good estimation of ero
dibility for the set of Latosols of Brazil, being necessary the development
of specific models for this group of soils.