| UAV | Unmanned aerial vehicle |
| NDVI | Normalized difference vegetation index |
| ETc | Crop evapotranspiration |
| ET0 | Reference evapotranspiration |
| DAS | Days after sowing |
| ID | Irrigation depth |
| CHU | Crop heat units |
| CAR | Correlation among repeated measurements |
| SPAD | Soil plant analysis development |
| FW | Fresh weight |
| DM | Dry matter |
| CP | Crude protein |
| NDF | Neutral detergent fiber |
| ADF | Acid detergent fiber |
| GDD | Growing degree days |
| R | Red |
| NIR | Near-infrared |
| ESA | European Space Agency |
| ANOVA | Analysis of variance |
| RMSE | Root Mean Squared Error |
| MAE | Mean Absolute Error |
| MBE | Mean Bias Error |
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