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 |
|---|---|---|
| Smell detection floor | 10 ppm | ICAR-DMR manual, 2011. Below this the nose generally cannot detect ammonia at all |
| Formulation nitrogen at stacking | 1.5 to 1.75 percent dry weight | ICAR-DMR manual, 2011. Above 1.75 percent, more nitrogen is lost as ammonia and yellow moulds follow |