NVZ Dates and Nutrient Offtake
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)* :
Start Date | End Date | Land Use | Soil Type |
---|---|---|---|
1 August | 31 December | Tillage Land | Shallow or sandy soils |
1 September | 31 December | Grassland | Shallow or sandy soils |
16 September | 31 December | Tillage land with crops sown on or before 15 | September |
1 October | 31 January | Tillage land | All other soils |
15 October | 31 January | Grassland | All other soils |
* 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:
Start Date | End Date | Land Use | Soil Type |
---|---|---|---|
1 September | 15 January | Tillage land | All soils |
15 September | 15 January | Grassland | All soils |
Many people often wonder about the true cost of removing straw from fields. We have done the calculations here for you with current P + K prices to replace the nutrients removed
Fertiliser offtake values are taken from the RB209
MOP – £265/t
TSP – £315/t
Crop | Nutrient | Kg/t Nutrient Removed in straw | Grain Tonnes t/ha | Offtake kg/ha | Fert Required Kg/ha | Cost of Fert /ha |
---|---|---|---|---|---|---|
Winter Wheat/Barley | Phosphate | 0.6 | 10 | 6 | 13.04 | 8.93 |
Potash | 4.8 | 10 | 48 | 80 | 35.33 | |
Total Cost of Fertiliser | £44.27 |
Crop | Nutrient | Kg/t Nutrient Removed in straw | Grain Tonnes t/ha | Offtake kg/ha | Fert Required kg/ha | Cost of Fert /ha |
---|---|---|---|---|---|---|
Spring Wheat/Barley | Phosphate | 0.8 | 7 | 5.6 | 12.17 | £2.47 |
Potash | 6.2 | 7 | 43.4 | 72.33 | £29.72 | |
Total Cost of Fertiliser | £32.19 |
Crop | Nutrient | Kg/t Nutrient Removed in straw | Grain Tonnes t/ha | Offtake kg/ha | Fert Required kg/ha | Cost of Fert /ha |
---|---|---|---|---|---|---|
Winter/Spring Oats | Phosphate | 1 | 7 | 7 | 15.22 | £3.09 |
Potash | 11.1 | 7 | 77.7 | 129.50 | £53.21 | |
Total Cost of Fertiliser | £56.30 |