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 |
|---|---|---|
| Ceiling at spawning | 72 % | ICAR-DMR manual, 2011. above this, poor aeration and plaster moulds |
| Floor linked to weepers | 64 % | NHB DPR model, 2018. dry compost under a wet casing |

