VIs | Estimated N% = a (measured N%) + b | R2 | RMSE (%) |
NDVI | 0.7265x + 0.3464 | 0.67 | 0.168 |
NDVIred edge | 1.026x + 0.0815 | 0.84 | 0.148 |
EVI2 | 0.8167x + 0.2694 | 0.78 | 0.165 |
SRred edge | 1.0419x + 0.0799 | 0.84 | 0.179 |
CIgreen | 1.2495x − 0.1527 | 0.84 | 0.196 |
CIred edge | 1.0417x + 0.08 | 0.84 | 0.179 |
MTCI | 0.7932x + 0.3497 | 0.84 | 0.160 |
RTVIcore | 0.8434x + 0.2811 | 0.84 | 0.147 |