Research Article
Characterization and Classification of Soils of Abobo Area, Western Ethiopia
Table 6
Soil pH, electrical conductivity, and calcium carbonate.
| Pedon | Horizon | Depth (cm) | pH (1 : 2.5) | ΔpH | EC (dS m−1) | CaCO3 (%) | (H2O) | (KCl) |
| A-1 | Ap | 0–18 | 6.0 | 5.1 | 0.9 | 0.10 | 0.23 | Bw1 | 18–25 | 6.1 | 5.6 | 0.5 | 0.10 | 0.19 | Bw2 | 25–35 | 6.0 | 5.3 | 0.7 | 0.08 | 0.15 | CB | 35–110 | 6.3 | 5.6 | 0.7 | 0.08 | 0.24 |
| A-2 | A | 0–18 | 6.5 | 5.8 | 0.7 | 0.15 | 0.25 | Ad | 18–27 | 6.7 | 5.9 | 0.8 | 0.10 | 0.17 | Bt1 | 27–37 | 6.1 | 5.4 | 0.7 | 0.07 | 0.20 | Bt2 | 37–50 | 6.3 | 5.6 | 0.7 | 0.07 | 0.35 | BC | 50–80 | 6.4 | 5.7 | 0.7 | 0.05 | 0.31 |
| A-3 | Ap | 0–22 | 6.7 | 5.9 | 0.8 | 0.23 | 0.28 | A | 22–33 | 6.5 | 5.7 | 0.8 | 0.21 | 0.25 | Bt1 | 33–45 | 6.3 | 5.6 | 0.7 | 0.14 | 0.23 | Bt2 | 45–63 | 6.3 | 5.5 | 0.8 | 0.09 | 0.25 | BC | 63–85 | 6.0 | 5.3 | 0.7 | 0.09 | 0.27 |
| A-4 | Ap | 0–10 | 6.6 | 5.8 | 0.8 | 0.16 | 0.29 | A | 10–19 | 6.0 | 5.4 | 0.6 | 0.10 | 0.21 | Bt1 | 19–37 | 6.3 | 5.6 | 0.7 | 0.09 | 0.14 | Bt2 | 37–75 | 6.1 | 5.2 | 0.9 | 0.06 | 0,17 | BC | 75–90 | 6.2 | 5.5 | 0.7 | 0.06 | 0.13 |
| A-5 | Ap | 0–17 | 5.5 | 4.7 | 0.8 | 0.11 | 0.16 | A | 17–55 | 5.7 | 4.9 | 0.8 | 0.08 | 0.15 | Bss1 | 55–116 | 6.1 | 5.0 | 1.1 | 0.06 | 0.22 | BCss2 | 116–150 | 6.5 | 5.8 | 0.7 | 0.06 | 0.27 |
| A-6 | Ap | 0–20 | 7.1 | 6.4 | 0.7 | 0.24 | 0.39 |
| A-7 | A | 0–29 | 6.1 | 5.1 | 1.0 | 0.15 | 0.19 | Bss1 | 29–48 | 6.1 | 5.3 | 0.8 | 0.13 | 0.21 | Bss2 | 48–105 | 6.6 | 5.3 | 1.3 | 0.07 | 0.29 | BCss | 105–150+ | 6.8 | 5.9 | 0.9 | 0.16 | 0.31 |
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