Table 2: Some examples from Msekera, Zambia of changes in soil physical properties (0-20 cm) due to fertilizer trees/shrubs (Fert Tree) in improved fallows and the control (sole maize) and the % change [24,85].
| Variable | Tree species | + Fert Tree | Control | % Change |
|---|---|---|---|---|
| Bulk density (Mg m-3) | Gliricidia | 1.39 | 1.53 | -9.2 |
| Gliricidia | 1.40 | 1.42 | -1.4 | |
| Aggregate stability (mm) | Sesbania | 8.3 | 61.2 | 36.1 |
| Infiltration rate (mm h-1) | Gliricidia | 16.0 | 4.0 | 300.0 |
| Time to runoff (mins) | Sesbania | 7.0 | 3.0 | 133.3 |
| Drainage (mm) | Sesbania | 56.4 | 15.8 | 257.0 |
| Sesbania | 10.9 | 1.0 | 990.0 | |
| Sesbania | 61.1 | 7.6 | 703.9 | |
| Sesbania | 10.7 | 5.7 | 87.7 | |
| Penetrometer resistance (Mpa) | Sesbania | 2.2 | 3.2 | -31.3 |
| Pigeon pea | 2.9 | 3.2 | -9.4 |