“…Combellack and Andrews (1984) showed that spray deposition variation from flat fan nozzles was the least when the angle of the spray sheet was between 10° and 17.5° to the boom. Similarly, it was shown that with flooding, Raindrop, and hollow cone nozzles, directing the spray backwards or down, significantly improved the spray distribution uniformity to the swath , Krishnan et al, 1989. showed that hydraulic flat fan nozzles at a given angle (0 to 40°) have an almost constant vmd.…”