In order to relate physiological processes to production, the former must be integrated over time (Thomas and Howarth, 2000). But, as ChlSPAD assessments at different phenological stages and the establishment of a temporal pattern are not always possible when evaluating many accessions, at least two measurements, the first at 1–2 weeks after water restriction initiation and the other at the end of the growth cycle are recommended for assessing the temporary increase of greenness after water restriction and senescence rate. Visual assessment of senescence according to Jefferies and Lawson (1991) key is also recommended to be performed in breeding centers that aim to produce improved varieties to cope with water stress.