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 |
|---|---|---|
| Bulk tunnel fill height | 2 to 2.2 metres | ICAR-DMR manual, 2011. Loaded so one square metre of floor holds 900 to 1,000 kg |
| Levelling off after filling | 45 to 48 °C | ICAR-DMR manual, 2011. Plenum, compost and air brought level in four to five hours |

