How can the accuracy of fertiliser application be improved?
Setup and calibration of fertiliser spreaders is very important to ensure even distribution of fertilisers when spreading. This involves adjusting the spreader settings to achieve accurate application rates and uniform coverage.
Proper calibration not only maximises the benefits of fertilisation, but also minimises the risks of over- or under-application, which can lead to yield losses, environmental pollution, and increased production costs.
Keeping the machine in good condition
Regular maintenance, including cleaning, lubrication, and inspection of components, is essential to ensure proper functionality. Worn vanes, in particular, can significantly impact the spread pattern and distribution uniformity. As vanes wear out over time, this will result in uneven spreading, resulting in areas of over- or under-fertilisation. By replacing worn vanes promptly, farmers can maintain consistent application rates and optimise fertiliser efficiency.
Flow characteristics and spread patterns
Different fertiliser types have different particle sizes and densities, leading to variations in spreading behaviour. Consequently, adjustments to spreader settings are needed to maintain an accurate spread width and flow rate, and achieve uniform coverage across the field. Failure to adjust spreader settings to suit the product can result in uneven distribution and suboptimal fertiliser utilisation.
Headland control mechanisms
To mitigate the risk of over-application and to reduce environmental impact, farmers can utilise headland control mechanisms. These systems allow operators to adjust the spread pattern when spreading at the field’s edges, preventing excess application in headland areas. By minimising overlap and reducing wastage, headland control mechanisms not only conserve resources but also help protect nearby hedgerows and watercourses from pollution. This proactive approach to precision farming promotes sustainable agricultural practices while enhancing crop productivity and environmental stewardship.
In the below video, Francis Quigley, Farm Machinery and Milking Machine Specialist at Teagasc, shares key details on how to calibrate the fertiliser spreader:
The above article was adapted for use on Teagasc Daily from the paper titled: ‘Strategies to reduce reliance on chemical nitrogen fertiliser on farms’ by Mark Plunkett, Niall Kerins, Siobhán Kavanagh and Francis Quigley. The full paper is available to view here.