18. Subject to regulations 19 and 20, no person may spread organic manure with high readily available nitrogen on land between the following dates, all inclusive (“the closed period”)—
Soil Type | Grassland | Tillage land |
---|---|---|
Sandy or shallow soil | 1 September to 31 December | 1 August to 31 December |
All other soils | 15 October to 15 January | 1 October to 31 January |