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pH of the soils with/without liming, measured in 0.01 mol l−1 CaCl2 (1:5 w/v)
| Soil sample | No lime | Lime added | ||
|---|---|---|---|---|
| No glutamate | With glutamate | No glutamate | With glutamate | |
| Fjaler pH4 (F4) | 3.60 | 3.77 | 6.71 | 6.95 |
| Fjaler pH6 (F6) | 6.18 | 5.96 | 6.81 | 6.97 |
| Shouguang (SG) | 6.68 | 6.71 | 7.06 | 7.20 |
| Qiyang (QY) | 5.14 | 5.20 | 6.89 | 7.12 |
