| Evaluated parameter | Sources of variation | ||
| Location (L) | Fertilization treatment (F) | Interaction (L × F) | |
| DM production | ** | ** | * |
| DM Zn concentration | ** | ns | ns |
| DM Cu concentration | ns | ** | ** |
| Grain yield | * | ** | ns |
| Grain Zn concentration | ns | ns | ns |
| Grain Cu concentration | ** | ** | ns |
| Soil pH 0 - 20 cm | ** | ** | * |
| Soil pH 20 - 40 cm | ** | ns | ns |
| Soil Zn 0 - 20 cm | ns | ** | ns |
| Soil Zn 20 - 40 cm | * | ** | ns |
| Soil Cu 0 - 20 cm | ** | ** | ns |
| Soil Cu 20 - 40 cm | ** | ** | * |