| Value | Category | Cases | |
|---|---|---|---|
| 1 | loss of top soil | 41 |
8.3%
|
| 2 | change in soil color | 124 |
25.1%
|
| 3 | reduction of the yield over time | 314 |
63.6%
|
| 4 | Other | 15 |
3%
|
| 9 | NA | 0 |
0%
|
| Sysmiss | 15563 |