| |||
| amélioration par l'apport de cendres | |||
|
soil improvement : 28 phrases in 10 subjects |
| Agriculture | 5 |
| Chemistry | 1 |
| Construction | 3 |
| Economics | 1 |
| Environment | 2 |
| Finances | 1 |
| General | 2 |
| Life sciences | 2 |
| Natural resourses and wildlife conservation | 10 |
| Politics | 1 |