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 |
|---|---|---|
| Air speed over beds | 15 cm per second | ICAR-DMR manual, 2011. Measured at crop level |
| Fresh air share | 20-30 % | ICAR-DMR manual, 2011. 30 percent early, 20 percent later |

