| A/D | Analog-to-Digital value |
| EC | Electrical Conductivity |
| EM | Electromagnetic |
| FDR | Frequency Domain Reflectometry |
| IS | Indian Standard |
| LS | Least Squares (estimate) |
| MAE | Mean Absolute Error |
| RAE | Relative Absolute Error |
| RMSE | Root Mean Square Error |
| SD | Standard Deviation |
| SSR | Sum of Squared Residuals |
| TDR | Time Domain Reflectometry |
| VWC | Volumetric Water Content |
| WSN | Wireless Sensor Network |