Main causes | Fréquency | % | Rank |
Increasing of dry spell length | 224 | 55.4 | 1 |
Erratic rainfall | 43 | 10.6 | 3 |
Agricultural pressure | 102 | 25.2 | 2 |
Abandonment of tradition | 6 | 1.5 | 5 |
Livestock pressure | 17 | 4.2 | 4 |
Land degradation | 6 | 1.5 | 5 |
Late bush fires | 5 | 1.2 | 6 |
Herbicide | 1 | 0.2 | 7 |