Spreader Calibration

As bulk fertiliser importers Thomas Bell provide various types of services.

  • We operate in bulk fertiliser deliveries saving you a lot of time and money.
  • We do soil testing to ensure accurate PK and trace elements applications.
  • We fully recommend calibrating your spreader for optimum results with SCS Spreader and Sprayer Testing Ltd

It is important to adjust the spreader to the correct settings - please check your spreaders are calibrated correctly before spreading your fertiliser.


Failure to check your fertiliser spreader is properly calibrated could result in wasting fertiliser and variable crop growth.


Tray testing and calibration is the only way to ensure an accurate application whether the machinery is old or new. Two items must be considered when calibrating a spreader.


  1. The distribution pattern of the spreader. That is, the pattern the fertiliser makes as it strikes the ground after being thrown out by the spreader's impeller. There are many factors that affect the distribution pattern of a rotary spreader and some of them relate directly to the product. For this reason, we recommend that the spreader be calibrated separately for every type of fertiliser which is to be applied.
  2. The fertiliser application rate, which is the amount of fertiliser applied per thousand square feet. This is important because over-application can be costly and may cause plant injury, while under-application will reduce the effectiveness of the fertiliser.

Thomas Bell recommend you use SCS Spreader and Sprayer Testing Ltd, they will check the fertiliser prill size, strength and width, then go out into your field with a full set of trays, do a pass with the tractor and spreader, and collect the contents to asses the fertiliser distribution pattern, at this point final adjustments can be made to your spreader.


Checking your spreader settings is an absolute must for anyone with a focus on the bottom line.

Get in touch

Thomas Bell & Sons Ltd

Bigby Road


DN20 8RA

Phone: 01652 652933
Fax: 01652 651313

Print Print | Sitemap
© 2020 Thomas Bell & Sons Ltd - Reg No 1271192 - Vat No. 288 4222 36