| Value | Category | Cases | |
|---|---|---|---|
| 1 | loss of top soil | 310 |
14.1%
|
| 2 | change in soil color | 528 |
24%
|
| 3 | reduction of the yield over time | 1292 |
58.6%
|
| 4 | Other | 74 |
3.4%
|
| 9 | NA | 0 |
0%
|