These figures belong to the named source and method. Historical costs are not current quotations. A value without its stage, material basis or measurement location is not a farm instruction.
| What is measured | Value and basis | Source and limitation |
|---|---|---|
| European benchmark in the same DPR | 30-35 kg per m2 at 90 kg fill | NHB DPR model, 2018. Printed for contrast only. |

