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 |
|---|---|---|
| Phase II ceiling | 60 °C | ICAR-DMR manual, 2011. Above it: olive green mould and loss of thermophilic flora. Target is 58 to 59 °C. |
| Free ammonia at spawning | 10 ppm maximum | ICAR-DMR manual, 2011. The nose cannot detect below about 10 ppm. |

