| N | Nitrogen |
| C | Control |
| U | Urea |
| I | Urea with urease inhibitor |
| D1 | Row spacing 30 cm × 20 cm |
| D2 | Row spacing 50 cm × 20 cm |
| NDVI | Normalized Difference Vegetation Index |
| SPAD | Soil Plant Analysis Development |
| NUE | Nitrogen Use Efficiency |
| NUtE | Nitrogen Utilization Efficiency |
| NAE | Nitrogen Agronomic Efficiency |
| HI | Harvest Index |
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