Determining water status of walnut orchards using the crop water stress index and canopy temperature measurements

Table 1 Relationships between CWSI_s and CWSI_{Tr_day} and between CWSI_t and CWSI_{Tr_day} at various times. Note: CWSI_s, simplified crop water stress index; CWSI_t, theoretical crop water stress index; CWSI_{Tr_day}, the daily averaged crop water stress index calculation using the measured transpiration rate

Local time	CWSI_s- CWSI_{Tr_day} relationship					CWSI_t-CWSI_{Tr_day} relationship
Local time	Slope	Intercept	R²	RMSE	IA	Slope	Intercept	R²	RMSE	IA
8	0.44	0.37	0.11	0.32	0.55	0.64	0.23	0.12	0.30	0.47
9	1.09	0.13	0.24	0.29	0.57	1.13	0.08	0.28	0.28	0.58
10	1.57	-0.07	0.61	0.25	0.72	1.75	-0.15	0.73	0.24	0.71
11	0.98	0.07	0.56	0.20	0.83	1.98	-0.24	0.85	0.22	0.86
12	0.97	0.05	0.82	0.11	0.94	1.71	-0.15	0.80	0.22	0.87
13	1.11	0.03	0.67	0.20	0.84	1.73	-0.25	0.79	0.20	0.79
14	1.03	0.08	0.66	0.18	0.87	1.67	-0.32	0.78	0.20	0.82
15	1.11	0.05	0.68	0.17	0.81	1.73	-0.42	0.70	0.21	0.70
16	1.28	-0.05	0.62	0.19	0.82	1.06	-0.17	0.62	0.26	0.71
17	1.25	-0.05	0.67	0.17	0.86	0.97	-0.21	0.41	0.36	0.50
18	-	-	-	-	-	1.59	-0.83	0.57	0.45	0.40

ISSN: 1746-4811