| Soil indicator | Low | Suitable | High |
| pH | <5.5 | 5.5 - 7.0 | >7.0 |
| Exc. Ca2+ [cmol(1/2Ca2+) kg−1] | <6 | 6 - 10 | >10 |
| Exc. Mg2+ [cmol(1/2Mg2+ kg−1] | <1.0 | 1.0 - 1.6 | >1.6 |