Research Article
Extractable Al and Soil Solution Ionic Concentrations in Strongly Leached Soils from Northwest Iberia: Effects of Liming
Table 8
Activities of soluble complexes of Al (μM L−1) in unlimed (control) studied soil solutions, as speciated by the GEOCHEM program.
| | Pedon | Horizon | Free Al+3 | Al(OH)+2 | | | Al(OH)4 | | |
Almono |
| | Umbrisols | | 1 | Ah1 | 375.7 | 150.0 | 46.8 | 0.4 | 0.01 | 7.4 | 0.6 | 580.8 | | 3 | Ah1 | 137.0 | 108.0 | 68.5 | 1.1 | 0.11 | 3.3 | 2.0 | 320.0 | | 4 | Ah1 | 269.0 | 171.0 | 84.2 | 1.1 | 0.09 | 5.6 | 8.6 | 539.5 | | Cambisols | | 5 | Ah | 173.2 | 86.1 | 34.5 | 0.4 | 0.02 | 3.3 | 0.4 | 297.9 | | 6 | Ah1 | 128.6 | 51.7 | 16.2 | 0.1 | 0.01 | 2.7 | 1.7 | 201.1 | | Luvisols | | 7 | Ah | 32.9 | 61.1 | 67.8 | 2.1 | 0.44 | 0.1 | 2.5 | 166.9 | | 8 | Ah | 14.8 | 14.9 | 11.7 | 0.2 | 0.03 | 0.3 | 2.4 | 44.3 | | Regosols | | 10 | Ah | 418.4 | 133.0 | 33.1 | 0.2 | 0.01 | 2.5 | 0.3 | 587.5 | | 11 | Ah | 107.5 | 137.0 | 134.0 | 3.4 | 0.55 | 0.1 | 1.0 | 383.4 |
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