Table 4.
Summary of the aboveground biomass (AGB) estimation performance using LAI, bands, and various vegetation indices (red-edge and traditional-based) as predictor variables
| Seasons | Variables | R2 | RMSE (kg/ha) | RRMSE% | P<0.05 |
|---|---|---|---|---|---|
| WDVI | 0.057 | 0.14 | 46.476 | 0.035* | |
| NDREI1 | 0.060 | 0.14 | 46.391 | 0.028* | |
| NDREI2 | 0.055 | 0.14 | 46.509 | 0.036* | |
| Early-summer | SLAVI | 0.093 | 0.13 | 45.58 | 0.006** |
| CLRE | 0.056 | 014 | 46.501 | 0.035* | |
| B2 | 0.069 | 0.13 | 46.164 | 0.0184* | |
| B6 | 0.102 | 0.13 | 45.334 | 0.003** | |
| B7 | 0.109 | 0.13 | 45.164 | 0.003** | |
| B8 | 0.085 | 0.13 | 45.777 | 0.009** | |
| B8A | 0.100 | 0.13 | 45.391 | 0.004** | |
| NDREI1 | 0.111 | 0.13 | 45.119 | 0.003** | |
| Winter | MCARI | 0.064 | 0.13 | 46.292 | 0.023* |
| B2 | 0.051 | 0.14 | 46.618 | 0.044* | |
| Later-summer | LAI | 0.052 | 0.10 | 25.310 | 0.042* |
| NDREI2 | 0.042 | 0.010 | 29.461 | 0.037* |
*Significance level of 0.05 and **significance level of 0.01