Research Article
Tillage System Affects Soil Organic Carbon Storage and Quality in Central Morocco
Table 1
Selected soil characteristics at the different sites (Merchouch, Morocco).
| Site/soil | Depth (cm) | Clay (%) | Silt (%) | Sand (%) | Texture class | pH (1.1 H2O) | P2O5 (mg/kg) | K2O (mg/kg) |
CaCO3 total (g/kg) | SOC (g/kg) |
| Site 1 Vertisol | 0–20 | 49 | 29.5 | 21.5 | C | 7.02 | 21 | 234 | 3.6 | 12.2 | 20–80 | 52 | 26.6 | 21.4 | C | 7.23 | 11 | 133 | 7.3 | 11.4 | 80–120 | 53 | 23.1 | 23.9 | C | 7.37 | 5 | 139 | 8.5 | 9.7 |
| Site 2 Cambisol | 0–25 | 44 | 37 | 18 | C | 7.9 | 58 | 237 | 1.2 | 11.7 | 25–55 | 41 | 49 | 10.0 | SiC | 7.8 | 5 | 133 | 4.4 | 11.1 | 55–90 | 38 | 55 | 7.4 | SiL | 7.7 | 3 | 108 | 9.5 | 5.5 |
| Site 3 Luvisol | 0–15 | 19 | 36 | 45 | L | 7.1 | 40 | 259 | 5.5 | 7.4 | 15–50 | 25 | 28 | 47 | L | 7.2 | 14 | 129 | 10.5 | 6.5 | 50–100 | 36 | 21 | 43 | L | 7.4 | 4 | 109 | 10.1 | 6.2 |
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C: clay; SiC: silty clay; SiL: silty loam; L: loam (following the textural triangle [13]).
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