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 |
|---|---|---|
| Moisture ceiling at spawning | 72 percent | ICAR-DMR manual, 2011. Above this aeration fails and plaster moulds appear |
| Moisture floor linked to weepers | 64 percent | NHB DPR model, 2018. Dry compost under wet casing produces weeping mushrooms |

