2 results

Representation and propagation of soil data uncertainties. II – Numeric attributes

S. Bönisch, M. L. Lopes Assad, A. M. V. Monteiro, G. Câmara

01/Feb/2004

The objectives of this study were to use kriging indicators to generate a representation of soil properties expressed by numeric attributes, to assess the uncertainty in estimates, and to model the uncertainty propagation generated by the fuzzy procedures of map algebra. The studied attributes were exchangeable potassium (K) and aluminum (Al) contents, sum of bases (SB), cationic exchange capacity (CEC), base saturation (V), and total sand content (TST), extracted from 222 pedologic profiles and 219 extra samples, located in Santa […]

Representation and propagation of soil data uncertainties. I – Categoric atributes

S. Bönisch, M. L. Lopes Assad, G. Câmara, A. M. V. Monteiro

01/Feb/2004

The objectives of this work were to generate a representation of soil properties expressed by categorical attributes by kriging indicator; to assess the uncertainty in estimates, and to model the uncertainty propagation of map algebra by means of boolean procedures. The studied attributes were potassium (K) and aluminum (Al) exchangeable contents, sum of bases (SB), cationic exchange capacity (CEC), base saturation (V), texture (Tx) and relief classes (RC), effective soil depth, internal drainage, and stoniness and/or rockiness, extracted from 222 […]