Table 9.

Evaluation of indexes of the fitting models during the whole growth period.

Spectral Parameters	Fitted Model	Model Evaluation Indexes
		R2	RMSE (g.g–1)	MAE (g.g–1)
762 nm	y = 3.3749R7620.8638	0.306	0.514	0.413
726 nm	y = 42.042 (R726′)0.6537	0.639	0.368	0.298
762 nm, 944 nm, 957 nm	y = 0.881 − 10.194R762 − 20.056R957 + 11.469R944	0.711	0.328	0.262
NDRE	y = 5.6378x2 + 0.48x + 0.791	0.754	0.322	0.258