## 3 Results
### Out
As was proven for camelina, in the case of oat the influence of compost and fly ash can be seen, because the differences between values of bioconcentration factors, calculated for Cu and Zn and those obtained for T0 and TI as well as T0 and TII differed significantly. An exception in this respect was found for BCF\({}_{\text{B}}\) of copper. Enriching the soil with compost or fly ash did not significantly change the value of this parameter for Cu (Table 3). Application of compost or fly ash decreased the Cu values by 24-26% (BCF\({}_{\text{T}}\)) and by 14-17% (BCF\({}_{\text{B}}\)), respectively. For Zn the values of bioconcentration factors were lower by 35-39% (BCF\({}_{\text{T}}\)) and by 22% (BCF\({}_{\text{B}}\)) in comparison with the control. At the same time, the stronger influence of compost should be underlined here. The average BCF\({}_{\text{T}}\) values for Cu ranged from 0.06 (TI, TII) to 0.08 (T0), whereas the average BCF\({}_{\text{B}}\) values for this metal ranged from 0.15 (T0, TI) to 0.16 (TII). In the case of Zn, BCF\({}_{\text{T}}\) ranged from 0.34 (TI) to 0.55 (T0), whereas BCF\({}_{\text{B}}\) ranged from 2.53 (TI) to 3.24 (T0, TII), respectively (Figure 8). The influence of compost and fly ash was proven statistically because the differences between values of EDI\({}_{\text{W}}\), EDI\({}_{\text{M}}\), HRI\({}_{\text{W}}\), and HRI\({}_{\text{M}}\) calculated for Cu and Zn for T0 and TI as well as T0 and TII differed significantly (Table 3). Simultaneously, the effect of both compost and fly ash on the calculated parameters (EDI\({}_{\text{W}}\), EDI\({}_{\text{M}}\), HRI\({}_{\text{W}}\), and HRI\({}_{\text{M}}\)) for both metals was the same, because the values did not differ statistically. The data in Figure 9 shows the distribution of EDI and HRI values depending on gender of consumers and the additives used. A similar tendency may be observed as shown earlier for camelina, with higher values of these parameters determined for women, whereas at the same time under control conditions they were significantly higher. For women the calculated average EDI value for Cu ranged from 0.40 \(\upmu\)g\(\cdot\)kg\({}^{-1}\) (TI) to 0.49 \(\upmu\)g\(\cdot\)kg\({}^{-1}\) (T0), whereas HRI, regardless of the applied amendments, showed comparable values ranging from 0.010 to 0.012. The EDI\({}_{\text{W}}\) values calculated for TI and TII were 14-18% lower in comparison to these obtained for T0. In the case of men, the average values of both parameters calculated for Cu ranged from 0.32 \(\upmu\)g\(\cdot\)kg\({}^{-1}\) (TI, TII) to 0.39 \(\upmu\)g\(\cdot\)kg\({}^{-1}\) (T0) for EDI and from 0.008 (TI, TII) to 0.009 (T0) for HRI (Figure 9). Referring to the calculated EDI values for Zn, they were significantly higher for both women and men, whereas the HRI values were significantly lower compared to those discussed above for Cu. As it results from the data presented in Figure 10, the highest values of EDI\({}_{\text{W}}\), EDI\({}_{\text{M}}\), HRI\({}_{\text{W}}\), and HRI\({}_{\text{M}}\) calculated for Zn were determined under the control conditions. In turn, for the soil fertilized with compost or fly ash, they were lower. The application of immobilizing  
Figure 8: Bioconcentration factors for total (BCF\({}_{\text{T}}\)) and bioavailable amounts (BCF\({}_{\text{B}}\)) calculated for Cu and Zn in oat; * for descriptions see Material and Methods. Statistically significant differences and _p_-value are presented in Table 3.  
agents resulted in a reduction of EDIW and EDIM by 34% and 29%, respectively. For women, average EDI values for Zn ranged from 1.19 \(\mathrm{\SIUnitSymbolMicro kg^{-1}}\) (TI) to 1.79 \(\mathrm{\SIUnitSymbolMicro kg^{-1}}\) (T0), whereas for HRI these average values ranged from 0.004 (TI, TI) to 0.006 (T0). For men, the average EDI values for Zn ranged from 0.93 \(\mathrm{\SIUnitSymbolMicro kg^{-1}}\) (TI) to 1.41 \(\mathrm{\SIUnitSymbolMicro kg^{-1}}\) (T0), and the average HRI ranged from 0.003 (TI, TII) to 0.005 (T0), respectively (Figure 10).