Calibration of Boom Spray Equipment.
1/ To calculate the application rate of a boom, the following calculation can be used:
An example is included for your benefit:
A boom has a total output of 24 litres per minute from all nozzles, travels 200 mtrs per minute and has a swath width (effective spray width0 of 12 mtrs.
Total Nozzle Output ÷ Distance travelled ÷ Swath width x 10,000 = Liquid (water + chemical) Applic Rate
(in lts/min) ÷ (in mtrs/min) ÷ (in mtrs) × 10,000 = (in lts/ha)
2/ To calculate the amount of chemical to be put in a tank, the following calculation can be used:
Tank size ÷ Liquid App Rate x Chemical App Rate = Tot Chem to be added to Tank
(lts) (lts/ha) (lts or kgs/ha) (lts or kgs)
(from calculation 1)
Spray Record Sheets.
Spray Record Sheets are included in our Chemical Accreditation Course Manual.
Others are available from Qld DAF.