| Value | Category | Cases | |
|---|---|---|---|
| 1 | light - this includes sandy soils that are easy to | 35 | 
                                    
                                    18.2%
                                 | 
| 2 | medium - this includes loamy soils that are moderately | 153 | 
                                    
                                    79.7%
                                 | 
| 3 | heavy - this includes clayey soils that are hard | 4 | 
                                    
                                    2.1%
                                 | 
| Sysmiss | 207 |