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Page count: 126

However, applying 1.2 and 2.2 m/s crosswinds further reduced the air-jet velocities measured at 85 cm from the outlet by 11% and 20%, respectively. Wind effects were related to the wind direction. Perpendicular crosswind resulted in the highest velocity reduction. The high-velocity wind resulted in the highest deflecting distance of 12.3 cm for the air-jet discharged from small outlet. Increasing the air-jet outlet size mitigated the wind effect and reduced the deflection to 8.1 cm. The smallest droplet size was deflected more than the largest droplets. A crosswind of 2.2 m/s reduced the overall deposition on the intended target by 32%. However, increasing the droplet size mitigated the wind effect. In both open area and citrus grove tests, a tracer of Pyranine 10G was applied using an air-blast sprayer driven at 2 and 6 km/h in 2 directions and using 2 Albuz ATR Lilac and Blue nozzles. In the open-area test, deposition was sampled on artificial targets from three distances at each side of the sprayer. However, citrus leaves, collected from first and second tree row on the right side only of the sprayer, were used to sample the deposition in the citrus grove test. Fluorometric analysis was made of the samples from the two tests to determine the deposition. Leaf area measurements were also made. In the open area test, increasing the crosswind increased the deposition downwind at all the distances. However, it increased the deposition at 3 m upwind only and decreased it at the 6 and 9 m. Increasing the wind speed increased deposition variability upwind. At 9 m upwind, targets collected almost zero droplets. Increasing the parallel wind slightly decreased the deposition on both sides at all distances. However, driving in two opposite directions under windy conditions increased the deposition at tailwind and reduced it at headwind.