Figure 4.

Distribution of modelling feature extracted from the sensor response characteristics (integral/sum of the response data) for measurements of roots samples. The exact value of the y-axis for various sensors has no physical interpretation, thus is presented only in arbitrary units. The studied categories of samples: Actifos (A), Actifos+A. gallica (AG), A. gallica (G), Isolated Control (I), Control (C) are plotted in the x-axis. In the box-plots, the horizontal line inside the box represents the sample median, the box area spans from the 1st to the 3rd quantile, the whiskers span from Q1−1.5 * IQR to Q3 + 1.5 * IQR (IQR—interquantile range). This plot overlays all data points presented by dots, allowing us to see outliers and the whole data distribution.