Table 3. Training and testing accuracies of the ANN models in modeling soil temperature at different depths.

Input combination	Training			Testing
	RMSE (°C)	NSE	R2	RMSE (°C)	NSE	R2
5 cm
T	1.600	0.971	0.971	1.914	0.965	0.977
T, RH	9.276	0.049	0.130	10.82	-0.113	0.027
T, Rs, W	9.379	0.028	0.028	10.28	-0.005	0.052
T, Rs, W, RH	8.411	0.218	0.723	10.06	0.037	0.336
10 cm
T	1.237	0.981	0.981	1.429	0.977	0.980
T, RH	9.046	0.022	0.022	9.596	-0.004	0.004
T, Rs, W	7.968	0.241	0.729	9.085	0.099	0.314
T, Rs, W, RH	8.069	0.221	0.709	9.310	0.054	0.314
50 cm
T	1.058	0.978	0.978	1.456	0.966	0.984
T, RH	7.152	0.034	0.501	8.088	-0.035	0.085
T, Rs, W	6.846	0.114	0.537	8.465	-0.134	0.179
T, Rs, W, RH	6.538	0.192	0.557	8.146	-0.050	0.181
100 cm
T	4.488	0.400	0.401	5.407	0.290	0.406
T, RH	5.628	0.057	0.057	6.446	-0.008	0.115
T, Rs, W	4.949	0.270	0.270	6.053	0.110	0.205
T, Rs, W, RH	4.328	0.442	0.442	5.704	0.210	0.409