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Table II
Chemical properties of the topsoil in the 8 sampling plots. Concentrations in C, N and available P are given in g kg−1. Concentrations in exchangeable H+, Al3+, Ca2+, Fe3+, Mg2+, Mn2+, K+ and Na+ are given in cmol+ kg−1. The available P has been measured using the method of Duchaufour and Bonneau (1959).
| Code | SU-A | SU-B | SL-A | SL-B | BU-AB | U-B | BL-A | BL-B |
|---|---|---|---|---|---|---|---|---|
| N | 4.89 | 3.80 | 4.83 | 4.56 | 3.86 | 4.28 | 4.17 | 3.07 |
| C/N | 21.10 | 20.80 | 19.90 | 21.00 | 16.40 | 15.80 | 18.70 | 17.50 |
| C | 103.00 | 79.10 | 95.90 | 96.00 | 63.40 | 67.60 | 78.10 | 53.70 |
| pH | 4.24 | 4.01 | 4.27 | 4.38 | 4.16 | 4.02 | 4.60 | 4.53 |
| H+ | 1.44 | 1.16 | 1.00 | 0.76 | 0.76 | 0.84 | 0.76 | 0.80 |
| Al3+ | 8.10 | 8.91 | 6.74 | 8.39 | 6.95 | 8.20 | 4.86 | 5.22 |
| Ca2+ | 0.80 | 0.37 | 0.93 | 0.82 | 0.15 | 0.20 | 3.57 | 1.57 |
| Fe3+ | 0.14 | 0.22 | 0.10 | 0.07 | 0.09 | 0.11 | 0.02 | 0.02 |
| Mg2+ | 0.44 | 0.25 | 0.44 | 0.39 | 0.24 | 0.22 | 0.96 | 0.47 |
| Mn2+ | 0.18 | 0.10 | 0.24 | 0.05 | 0.06 | 0.14 | 0.44 | 0.43 |
| K+ | 0.41 | 0.29 | 0.39 | 0.27 | 0.30 | 0.35 | 0.41 | 0.29 |
| Na+ | 0.05 | 0.04 | 0.04 | 0.04 | 0.04 | 0.03 | 0.05 | 0.03 |
| P2O5 | 0.17 | 0.17 | 0.19 | 0.22 | 0.27 | 0.23 | 0.19 | 0.20 |