For the full NVZ guidance for 2013-2016, from www.gov.uk.
Closed period for applying organic manure with high readily available nitrogen content (e.g. slurry, poultry manures, liquid anaerobic digestate or liquid digested sewage sludge)* :
* For land newly in an NVZ in 2013, closed periods for organic manures do not need to be complied with until after July 2015.
Closed period for applying manufactured nitrogen fertilisers:
Manor Farm Barns