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This research aimed to modify the Nozzle of spraying system on the sprayer output to reduce the shift in spraying points on sprayed granules as a result of the wind blow from the environment. This electric sprayer consists of several components which are not found in a power sprayer or manual sprayer such as a 12-V battery or a 5.8 bar-pressure water pump. The result of the pressure comparison on the outlet showed a significant difference, namely in a 3-bar manual sprayer and a 4-bar electric sprayer. The pressure difference resulted in the difference in discharge, the length and width of the spraying. Keywords : discharge, electric, manual, pressure, sprayer Abstrak Penelitian ini bertujuan untuk memodifikasi Nosel pada system penyemprotan yaitu pada hasil keluaran sprayer untuk mengurangi pergeseran titik semprot pada butiran semprot yang timbul akibat adanya dorongan angin dari lingkungan. Sprayer elektrik terdiri dari beberapa komponen yang tidak terdapat pada power sprayer maupun manual sprayer seperti aki 12 V, pompa air tekanan 5.8 bar. Hasil perbandingan tekanan pada lubang keluaran menunjukan perbedaan tekanan yang cukup signifikan, yaitu pada sprayer manual 3 bar dan sprayer elektrik 4 bar. Perbedaan tekanan tersebut mengakibatkan adanya perbedaan debit, panjang penyemprotan dan luas penyemprotan. Kata Kunci : debit, elektrik, manual, sprayer, tekanan Diterima: 12 November 2013;Disetujui:27 Februari 2014

Modification of Spraying System For Weed Control Utilize With Knapsack Electric Sprayer