| Months | Large roots: I and II | Root density (roots/cm²) | Fine roots:III and IV |
| 6 |
 |
 |
 |
| 12 |
 |
 |
|
| 18 |
 |
 |
|
| 24 |
 |
 |
Fig. 5. Root density/cm² and its distribution on a matrix (1m²) in one soil with fair aeration and that had been tillage (subsoiling). four evaluation dates.