Useful Tools

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)   


  24   ÷  200   ÷   12   ×  10000   =  100
    ÷     ÷     ×     =  
    ÷     ÷     ×     =  
    ÷     ÷     ×     =  



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 DAFF.




Countryco Training Information

Countryco Training Pty Ltd delivers Chemical Accreditation Courses in Qld & NSW. Our Courses are all one day and Face-to-Face. 

Geoff Paton is the Principal of Countryco Training. He started the business in 1989 after years of experience in agriculture, both in Australia & overseas.

Geoff delivers the Chemical Acreditation and Supervision Skills Courses.