Review Article
Role of Earthworms in Soil Fertility Maintenance through the Production of Biogenic Structures
Table 6
Total and mineral nitrogen content in soil and fresh casts from earthworms incubated in different soil types (Barois et al., 1992 [
53]).
| Soil type | Layer (cm) | Earthworm species | Soil | Worm cast | | | | N total (%) | Mineral N (g g-1) | N total (%) | Mineral N (g g-1) |
| Andisol, Martinique | 0–10 | Pontoscolex corethrurus | 15.5 | 516.8 | 15.7 | 1095.1 | Andisol, Mexico | 0–10 | Pontoscolex corethrurus | 4.8 | 55.4 | 4.9 | 625.1 | Luvic, Cuba | 0–10 | Onychochaeta elegans | 2.6 | 55.4 | 2.4 | 212.5 | Ultisol, Yurimaguas | 0–10 | Pontoscolex corethrurus | 1.37 | 30 | 1.47 | 150.5 | Vertisol, Lamto | 0–10 | Protozapotecia australis | 3 | 52.1 | 4 | 560.9 |
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