Defra Tightens Autumn Muck-Spreading Rules
Beth Speakman
Jul, 08 2025There is a mix of relief and concern as Defra has confirmed that autumn muck and slurry spreading may continue within the Farming Rules for Water, but with stricter restrictions and requirements. This follows a High Court ruling which determined that the Environment Agency must place greater emphasis on immediate nutritional need rather than overall requirement.
Summary of Amended Rules:
- Autumn muck spreading is only justified when agronomic need is clearly proven.
- Farmers must have a nutrient management plan (NMP) for each field, prepared by a FACTS-qualified agronomist, referencing RB209 and using accredited farm software.
The following are now mandatory:
- Soil sampling and analysis
- Testing of organic manure prior to application
- Assessment of crop nutrient requirements
- Evidence of crop need and how the risk of diffuse pollution will be minimised
While the Environment Agency will continue with an advice-led approach before enforcement, repeated issues could lead to penalties. It is important that farmers take practical steps now to avoid future consequences.
Defra has confirmed that these rules will continue to be reviewed up to the deadline in September 2028, and farmers should monitor developments closely.
 Advice Going Forward:
- Keep NMPs up to date – Ensure all fields are mapped and nutrient applications are justified using RB209, agronomy software, and advice from a qualified agronomist.
- Plan for routine testing – Soil sampling and slurry/manure nutrient analysis will become mandatory. As results can take time, forward planning is essential.
- Review on-farm storage capacity – Reduced application opportunities may increase storage needs to avoid unjustified spreading.
- Maintain detailed records – Record the date, location, nutrient test results, chosen agronomic advisor, and estimated crop need based on RB209.
- Stay informed about grant funding – Especially those aimed at helping farmers upgrade slurry and muck storage facilities.
Summary
While farmers retain the right to spread in autumn, this must be supported by agronomic evidence and proper planning. The industry must continue to push for greater nutrient accountability. Being proactive will be key to managing these changes, with mandatory testing and record-keeping now essential.
Need help navigating these changes?
Get in touch with Ceres Rural for experience-led farming consultancy, technical support, and business management.
