Table 2.

The calculated R² between VI and chlorophyll contents using images acquired from different dates. Note: the data represents the time when the used images were acquired and E1–E18 are in corresponding with the VI in Table 1.

Date	E1	E2	E3	E4	E5	E6	E7	E8	E9
8 July	0.182	0.139	0.181	0.169	0.185	0.177	0.178	0.181	0.178
18 August	0.240	0.499	0.210	0.091	0.514	0.362	0.040	0.506	0.530
1 September	0.273	0.648	0.228	0.487	0.629	0.291	0.001	0.581	0.606
16 September	0.471	0.832	0.462	0.722	0.845	0.342	0.047	0.825	0.842
Date	E10	E11	E12	E13	E14	E15	E16	E17	E18
8 July	0.179	0.181	0.186	0.170	0.185	0.170	0.202	0.182	0.182
18 August	0.010	0.506	0.733	0.365	0.493	0.729	0.804	0.001	0.211
1 September	0.003	0.581	0.671	0.400	0.622	0.591	0.674	0.263	0.314
16 September	0.103	0.825	0.751	0.450	0.849	0.855	0.838	0.481	0.534