The marketing of fertilisers is regulated under both EU and national legislation mainly as regards the types of products which may be sold and their labelling requirements.
The code of good agricultural practice contains recommended nitrogen levels to protect waters from pollution while under the REP scheme strict limits are applied to application rates of fertilisers. An evaluation of the REP scheme in 1999 concluded that the reduced levels of nitrogen application on farms covered by the scheme has succeeded in reducing environmental problems. Any misuse of fertilisers, as with many crop inputs, may have implications for either the environment and for human health.