EVALUATION OF THE AGDISP GROUND BOOM SPRAY DRIFT MODEL

$*',63LVDZHOOHVWDEOLVKHGVSUD\GULIWPRGHOWKDWKDVEHHQYDOLGDWHG for aerial spraying of forests. Recently a prototypical ground boom RSWLRQKDVEHHQDGGHG WR$*',637KLVZDV HYDOXDWHG LQ WKH FXUUHQW study by collecting data from spray trials over a grass sward using a ground boom sprayer and representative application parameters. Spray solutions were made up of water, sticker adjuvant and a metal cation, which was changed for each spray application. Deposition from spray GULIWZDVPHDVXUHGE\DQDO\VHVRIWKHFDWLRQGHSRVLWVRQDUWLÀFLDOWDUJHWV (plastic tapes) placed on the grass surface. Measured deposition was FRPSDUHGZLWKSURÀOHVFDOFXODWHGXVLQJ$*',63$*',63RYHUSUHGLFWHG GHSRVLWLRQ IURP VSUD\ GULIW E\ D IDFWRU RI RXWVLGH WKH VSUD\ block. Possible reasons for these discrepancies are given. Options are to improve measured deposition and the algorithms for the deposition on the downwind swath of the spray block and evaporation of droplets