| Value | Category | Cases | |
|---|---|---|---|
| 1 | light - this includes sandy soils that are easy to | 5 |
11.6%
|
| 2 | medium - this includes loamy soils that are moderately | 20 |
46.5%
|
| 3 | heavy - this includes clayey soils that are hard | 18 |
41.9%
|
| Sysmiss | 8 |