| Value | Category | Cases | |
|---|---|---|---|
| 1 | dap + urea | 2218 |
31.8%
|
| 2 | dap only | 478 |
6.9%
|
| 3 | urea only | 193 |
2.8%
|
| 4 | did not use | 4084 |
58.6%
|
| Sysmiss | 180 |