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 |
|---|---|---|
| Casing depth, TNAU | 1 cm | TNAU Agritech portal. Pressed gently after spreading |
| Casing pH | 7.8-7.9 pH | ICAR-DMR manual, 2011. Button casing is 7.0 to 7.5 |

