Survey the soil type and nutrient indices of a field helps plan future needs and suitable cropping for a field
Soil Index System
In order to simplify advice tables, it is normal to classify soil available levels of nutrients and trace elements into classes. The class is referred to as the Soil Index. Soil analysis levels are classified into Index 1 – 9. The exact interpretation of the Soil Index varies somewhat with the element and the crop but the definitions in Table below apply in most circumstances.
| Table 1: The Soil Index System | ||
|---|---|---|
| Soil Index | Index Description | Response to Fertilisers |
| 1 | Very Low | Definite |
| 2 | Low | Likely |
| 3 | Medium | Unlikely/Tenuous |
| 4 | Sufficient/Excess | None |
