How to Calibrate a Broadcast Spreader

How to Calibrate a Broadcast Spreader

What You Will Need:

Our Calibration Guide For a Broadcast Spreader:

  1. Measure out a 20m length and mark each end with a flag or marker stick
  2. Pour your fertiliser into a jug and weigh on a set of scales how much you have making sure to make a note of this in grams. Then pour the fertiliser into the spreader making sure that the handle is in the shut position
  3. Choose a setting on your spreader. Ideally you should do different tests on the lowest, mid-range and highest machine settings, to get a better idea on the range of spreading rates
  4. Starting a small way back from the first marker, begin to walk towards the second marker at your normal walking speed, opening the handle and beginning to spread the fertiliser. Once you have reached the end marker, close off the handle and turn around and repeat the process back to the starting marker.
  5. With your tape measure, measure the width of the product spread. It may be easier to do these steps on a hard surface with a sheet covering or tarpaulin as this will make it clearer to see the product (and collect it afterwards so there’s no wastage), rather than hunting in the grass.
  6. Empty the remaining product from the spreader back into the jug and weigh the remains. The difference in weight from the amount in fertiliser you had before you started to spread to what you have left over is the amount of product you have used.
  7. Completing the following calculations will then give you the amount of product needed per metres squared for that specific setting:
    an image to show the maths calculations to calibrate a broadcasts spreader

If you would like to see an in depth video explanation on how to easily calibrate a broadcast spreader, see below: