Silva (2004) worked with Arabica coffee cv. ‘Obatã IAC 1669-20’ under irrigated and non-irrigated conditions in three different macroclimatic regions of the State of São Paulo, Brazil, and showed that under field conditions that withholding irrigation for 60 days in the months of July and August favored leaf water to reach potentials ranging from 1.1 to -1.6 MPa. These potentials were more effective in flowering synchronization, allowing uniformity of fruit maturation
(Fig. 2) and good fruit production. The higher number of flowerings episodes and the low uniformity in the production of the plants continuously irrigated (-0.5 MPa) development; moreover, they do not quantify the reflexes confirm the need for a drought period for flowering synchronization. This author also observed that low water potentials (-2.5 to -2.8 MPa) of the non-irrigated plants significantly reduced the number of flowers when compared to the irrigated plants, reflected in the final production, indicating the need of irrigation to assure an appropriate floral initiation (Emerson Alves da Silva, unpublished data).