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 |
|---|---|---|
| Nitrogen floor at stacking | 1.5 percent dry weight | ICAR-DMR manual, 2011. Below this the heap may not pass 55 to 60 °C |
| Minimum base batch | 300 kg | ICAR-DMR manual, 2011. Smaller heaps lose heat faster than they generate it |

