Table 1
The experimental scheme
| Object | Rubber rag content in soil [g×kg−1 DM* soil] |
|---|---|
| 0 - control | 0 |
| I | 10 |
| II | 50 |
| III | 100 |
Table 2
Heavy metals’ content in rubber rag [μg×g−1]
| Ni | Cd | Fe | Cu | Mn | Zn | Pb |
|---|---|---|---|---|---|---|
| 1.02 | 0.91 | 607.50 | 57.42 | 12.50 | 7386.51 | 12.50 |

Figure 1
The yield of roots and aboveground parts of maize [g×pot−1] grown on soil without (0) and with application of rubber rag (10, 50, 100 g×kg−1 DM soil)

Figure 2
Zinc content [μg×g−1 DM] in roots and aboveground parts of maize grown on soil without (0) and with application of rubber rag (10, 50, 100 g×kg−1 DM soil)

Figure 3
SPAD values in maize leaves grown on soil without (0) and with application of rubber rag (10, 50, 100 g×kg−1 DM soil); a, b – homogeneous groups (ANOVA and Tuckey's test p < 0.05)

Figure 4
Radar charts of physiological features of maize leaves F0, FM, FV grown on soil without (0) and with application of rubber rag (10, 50, 100 g×kg−1 DM soil)

Figure 5
Radar charts of physiological features of maize leaves Fv/F0, Fv/FM, grown on soil without (0) and with application of rubber rag (10, 50, 100 g×kg−1 DM)