| Value | Category | Cases | |
|---|---|---|---|
| 0 | No fertiliser applied at that time | 490 |
86.9%
|
| 1 | Amount decreased since then | 15 |
2.7%
|
| 2 | Amount unchanged | 36 |
6.4%
|
| 3 | Amount increased since then | 23 |
4.1%
|
| Sysmiss | 4429 |