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The Environment Agency has launched a campaign to highlight the risks of growing high-risk crops, which can lead to pollution and flooding, in the South West

of England

Parts of Cornwall and north and east Devon are considered at risk due to underlying soil types, slope and proximity to sensitive watercourses, roads and properties. Inadequate management of high-risk crops on these soil types can cause serious flooding and pollution, affecting nearby properties and wildlife.

These high-risk crops, as classified by the Department for Environment, Food and Rural Affairs, include maize, fodder beet, potatoes and other root vegetables.

Farmers who grow maize and other high-risk crops in Devon and Cornwall should take reasonable measures to prevent soil-erosion and muddy run-off, says the Environment Agency. Enforcement action could be considered if it is found such measures have not been taken.

When large areas of light soils are bare for long periods of time, particularly in the spring and early summer, they are vulnerable during heavy rainfall events. Light soils are prone to capping which reduces infiltration and increases the likelihood of flooding and pollution incidents associated with agricultural run-off on steep slopes.

Heavy clay soils and the slowly-draining soils that are either over deep clay or influenced by groundwater, lie naturally wet near the surface for long periods. These soils are at high-risk of compaction and run-off.

James Wimpress, land management project manager for the Environment Agency in Devon and Cornwall, said:

The farming industry has made good progress in dealing with problems associated with run-off, but more frequent extreme weather means that further action must be taken to prevent flooding and pollution in the future.

We want to raise awareness of how devastating flooding is when exacerbated by the production of high-risk crops in unsuitable locations, so farmers can make more sustainable decisions in line with our changing climate.

This is part of the Environment Agency’s plan to protect and enhance the environment as a whole and contribute to sustainable development. By 2025, it aims to create more climate-resilient places and infrastructure by ensuring the nation is prepared for flooding, coastal-change and drought. Field selection for the growing of high-risk crops is key to achieving this aim.

If farmers continue to grow high-risk crops in certain locations, they will need to develop site specific measures to prevent soil-erosion and run-off. The measures must be resilient to heavy rainfall and periods of prolonged wet weather. 

If a run-off incident occurs because preventative measures have not been taken or fail, the Environment Agency will likely take enforcement action against those responsible.

The agency has consulted the following organisations on this message, and they have given their support: National Farmers Union, Maize Growers Association.

For more information on the technical aspects of the campaign, the landing page.

The Farming Rules for Water, introduced in April 2018 as part of a wider package, state, “…the land manager must ensure that reasonable precautions are taken to prevent pollution resulting from soil-loss caused by land-management and cultivation practices.”

For more information on applying the Farming Rules for Water, visit gov.uk.

Click here for more information on the EA2025 Plan.

Alan Lovell, chair of the Environment Agency, will mention the campaign at the NFU conference on 20 February 2024.