02203naa a2200301 a 450000100080000000500110000800800410001910000180006024501180007826000090019650001440020552011310034965300250148065300250150565300330153065300290156365300340159265300150162665300280164165300190166965300230168870000230171170000180173470000230175270000180177570000180179377300900181120755132017-09-13       2017    bl uuuu     u00u1 u    #d1 aWOLSKI, M. S.  aDigital soil mapping and its implications in the extrapolation of soil-landscape relationships in detailed scale.  c2017  aTítulo em português: Mapeamento digital do solo e suas implicações na extrapolação das relações solo-paisagem em escala de detalhe.  aThe objective of this work was to test the extrapolation of soil-landscape relationships in a reference area (RA) to a topographic map (scale 1:50,000), using digital soil mapping (DSM), and to compare these results to those obtained in similar studies previously conducted in Brazil. A soil survey in a 10 km2 RA, using conventional mapping techniques (scale 1:10,000), was made in order to map a 678 km2 physiographically similar area (scale 1:50,000) using DSM. The decision tree technique was employed to build a predictive extrapolation model based on soil classes and eight terrain attributes in the RA. The validation of DSM by application of field observation points resulted in a 66.1% global accuracy and in 0.36 kappa index. The most representative soils in the area were correctly predicted, whereas the less representative and less frequent soils in the landscape (and consequently with reduced sampling) had their prediction compromised. The RA proportion, which equals 1.5% of the total area, is a limiting factor in the formulation of soil-landscape relationships to precisely represent the mapped area by DSM.  aÁrea de referência  aAtributos de terreno  aEstratificação da paisagem  aLandscape stratification  aMapeamento preditivo de solos  aPedometria  aPredictive soil mapping  aReference area  aTerrain attributes1 aDALMOLIN, R. S. D.1 aFLORES, C. A.1 aMOURA-BUENO, J. M.1 aCATEN, A. ten1 aKAISER, D. R.  tPesquisa Agropecuária Brasileira, Brasília, DFgv. 52, n. 8, p. 633-642, fev. 2017.