| Treatments | Dry matter yield (g·plant−1) | Nutrients content in maize plant shoots (mg·kg−1) |
| Cu levels (kg·ha−1) | ||
| 0 | 6.82 | 4.69 |
| 2 | 10.66 | 6.28 |
| 4 | 13.93 | 6.53 |
| 6 | 14.26 | 7.08 |
| 8 | 16.01 | 7.12 |
| 10 | 17.69 | 7.80 |
| 12 | 15.52 | 7.21 |
| LSD0.05 | 1.86 | 1.03 |
| CV % | 10.07 | 9.80 |
| Zn levels (kg·ha−1) | ||
| 0 | 5.60 | 3.15 |
| 2 | 9.45 | 4.58 |
| 4 | 15.86 | 7.78 |
| 6 | 17.71 | 9.97 |
| 8 | 19.63 | 10.40 |
| 10 | 18.22 | 8.71 |
| 12 | 16.79 | 8.15 |
| LSD0.05 | 3.28 | 1.25 |
| CV % | 12.8 | 32.2 |