02268naa a2200313 a 450000100080000000500110000800800410001910000230006024500970008326000090018050001000018952012570028965300260154665300250157265300310159765300210162865300150164965300140166465300260167865300280170465300320173270000230176470000230178770000190181070000200182970000170184970000180186677300700188421145122019-11-18       2019    bl uuuu     u00u1 u    #d1 aMOURA-BUENO, J. M.  aPrediction of soil classes in a complex landscape in Southern Brazil.h[electronic resource]  c2019  aTítulo em português: Predição de classes de solo em uma paisagem complexa no Sul do Brasil.  aThe objective of this work was to evaluate the use of covariate selection by expert knowledge on the performance of soil class predictive models in a complex landscape, in order to identify the best predictive model for digital soil mapping in the Southern region of Brazil. A total of 164 points were sampled in the field using the conditioned Latin hypercube, considering the covariates elevation, slope, and aspect. From the digital elevation model, environmental covariates were extracted, composing three sets, made up of: 21 covariates, covariates after the exclusion of the multicollinear ones, and covariates chosen by expert knowledge. Prediction was performed with the following models: decision tree, random forest, multiple logistic regression, and support vector machine. The accuracy of the models was evaluated by the kappa index (K), general accuracy (GA), and class accuracy. The prediction models were sensitive to the disproportionate sampling of soil classes. The best predicted map achieved a GA of 71% and K of 0.59. The use of the covariate set chosen by expert knowledge improves model performance in predicting soil classes in a complex landscape, and random forest is the best model for the spatial prediction of soil classes.  aCovariável preditora  aDigital soil mapping  aMapeamento digital de solo  aModelo preditivo  aPedometria  aPedometry  aPredictive covariates  aRelação solo paisagem  aSoil landscape relationship1 aDALMOLIN, R. S. D.1 aHORT-HEINEN, T. Z.1 aCANCIAN, L. C.1 aSCHENATO, R. B.1 aDOTTO, A. C.1 aFLORES, C. A.  tPesquisa Agropecuária Brasileiragv. 54, e00420, jan./dez. 2019.