Table 2.
Top five variables selected from first-order statistics and all variables by Boruta, DALEX, genetic algorithm (GA), least absolute shrinkage and selection operator (LASSO), and recursive feature elimination (RFE) for shoot mass (SM)
| Rank | From first-order statistics | From first- and second-order statistics | ||||
|---|---|---|---|---|---|---|
| Map | Variable | Date | Map | Variable | Date | |
| Boruta | ||||||
| 1 | Plant height | AVE | 0626 | Plant height | MOC-1 | 0712 |
| 2 | GNDVI | RANGE | 0716 | NDVI | SV | 0712 |
| 3 | Plant height | MAX | 0720 | NDVI | DV | 0712 |
| 4 | GNDVI | AVE | 0712 | Plant height | AVE | 0702 |
| 5 | NDVI | SD | 0712 | GNDVI | DV | 0724 |
| DALEX | ||||||
| 1 | Plant height | AVE | 0626 | NDVI | SV | 0712 |
| 2 | Plant height | MAX | 0702 | Plant height | SE | 0712 |
| 3 | Plant height | AVE | 0702 | NDVI | SE | 0712 |
| 4 | GNDVI | MAX | 0530 | NDVI | DV | 0712 |
| 5 | GNDVI | RANGE | 0530 | Plant height | Ent | 0626 |
| GA | ||||||
| 1 | Plant height | RANGE | 0618 | Plant height | RANGE | 0712 |
| 2 | Plant height | AVE | 0626 | NDVI | SV | 0712 |
| 3 | GNDVI | RANGE | 0716 | NDVI | IDM | 0702 |
| 4 | WDVI | MAX | 0724 | NDVI | DV | 0712 |
| 5 | NDVI | SD | 0712 | GNDVI | MOC-2 | 0724 |
| LASSO | ||||||
| 1 | Plant height | AVE | 0626 | Plant height | AVE | 0626 |
| 2 | GNDVI | RANGE | 0716 | GNDVI | DV | 0724 |
| 3 | NDVI | MAX | 0716 | NDVI | SV | 0716 |
| 4 | Plant height | MAX | 0702 | GNDVI | Con | 0618 |
| 5 | Plant height | SKEW | 0605 | Plant height | MAX | 0702 |
| RFE | ||||||
| 1 | Plant height | AVE | 0626 | NDVI | SV | 0712 |
| 2 | NDVI | MAX | 0716 | Plant height | MOC-1 | 0712 |
| 3 | Plant height | MAX | 0702 | NDVI | DV | 0712 |
| 4 | Plant height | AVE | 0702 | NDVI | MAX | 0716 |
| 5 | NDVI | SD | 0712 | GNDVI | DV | 0724 |