Erros do sensor veris utilizado em agricultura de precisão

Abstract

The veris sensor is a device capable of performing georeferenced point readings of electrical conductivity, organic matter and hydrogenionic potential. But such readings are often differ from those found in the laboratory. The aim of this study was to establish the correlation between the electrical conductivity data, hydrogenionic potential and organic matter collected by Veris sensor and analyzed in five laboratories. This was done for two areas called B3 and C6. So we were made all statistical correlations using the sstoolbox program, geostatistical analysis using GS + software and the generation of representative maps of the 3 variables using SMSTM software. With the work we conclude that the C6 area showed less variation and spatial variability of electrical conductivity and thus better statistical correlations with clay content. The pH showed low correlation observed by cross-validation between the read and the estimated values and high in the area B3 C6 area. Since the organic matter has high correlation in both areas. Finally we also found that there were discrepancies between the values found by the laboratory, which is a problem, since these values serve as the basis for the correlations.