Table 4.

Evaluation metrics for the implemented models for dry biomass estimation.

Model	FS1			FS2			FS3			FS4
	R2	MAE	RMSE	R2	MAE	RMSE	R2	MAE	RMSE	R2	MAE	RMSE
GPR	0.998	0.0305	0.119	0.97	0.0562	0.189	0.95	0.115	0.345	0.93	0.214	0.759
ER	0.96	21.509	41.668	0.96	21.606	41.391	0.83	29.769	81.012	0.93	39.303	54.028
TR	0.94	14.293	49.829	0.9	15.319	61.489	0.83	29.769	81.012	0.77	44.02	94.11
NNR	0.48	114.4	140.6	0.62	95.14	125	0.54	102.5	134	0.65	90.54	110
SVMR	0.42	125.2	158.6	0.58	102.65	118.6	0.53	109.4	140	0.6	97.86	122