Correlation

Regression types

R²

RMSE

MSE

Between measured AGB and estimated AGB

PLS

0.749

1.021

1.011

Random forest

0.760

0.966

0.934

CART decision tree

0.890

0.668

0.477

Equation: $\begin{array}{c}\text{AGB}=-0.\text{331}+0.\text{415}\ast \text{Clgreen}+\text{2}.\text{125}\ast \text{NDVI}+0.\text{415}\ast \text{Simpleratio}\\ +\text{3}.\text{86}0\ast \text{EV2}+\text{1}.\text{987}\ast \text{WDRVI}+\text{4}.0\text{82}\ast \text{MSAVI}\end{array}$