| Maximum pH values | Extent of variation | ||
---|---|---|---|---|
LpH (low pH) | HpH (high pH) | LpH (low pH) | HpH (high pH) | |
LA (low NH4 +) | 8.36 ± 0.03a | 8.34 ± 0.02a | 0.86 ± 0.03a | 0.44 ± 0.02b |
MA (medium NH4 +) | 8.66 ± 0.01b | 8.61 ± 0.04b | 1.16 ± 0.01c | 0.71 ± 0.04a |
HA (high NH4 +) | 8.78 ± 0.18b | 8.77 ± 0.07b | 1.28 ± 0.18c | 0.87 ± 0.07a |