The deposition pattern of flat fan nozzles "Extended Range" XR 8004, "Teejet" TP 8004 and "TwinJet" TJ60-8004 were evaluated, using a patternator table, built in accordance with ISO 5.682-1:1996, with the nozzle typs placed at 30, 40 and 50 cm above the patternator table being submitted to pressures of 200 and 300 kPa and angles of 30º and 45º, clockwise and counterclockwise and in the vertical position (0º). The TJ60-8004 nozzle units were installed at the same heights, but only in the vertical position. The mean collected spray volume distribution of 10 units of each type, in each configuration, was entered in a computer program, which simulated the deposition volume pattern of a boom sprayer with 24 nozzles placed in different spacings with, the coefficient of variation, standard deviation and mean volume being obtained from each simulation. The results showed that the distribution uniformity is less vulnerable to changes in height as the nozzle spacing is reduced and that adjustment on nozzle spacing is needed if any angle is used.
coefficient of variation; spray angle; nozzles; boom sprayer; spray deposition
