| in their fertility | 5 | location |
| in one of the minerals | 4 | location |
| year after year | 2 | temporal |
| soil → be → poorer | 13 |
| soil → become → poorer | 7 |
| negative | neutral | positive |
| 0.550 | 0.302 | 0.149 |
| Raw frequency | 20 |
| Normalized frequency | 0.271 |
| Modifier score | 0.500 |
| Perplexity | 460.911 |