Research Article
Characterization and Classification of Soils of Abobo Area, Western Ethiopia
Table 7
Organic carbon, total nitrogen, carbon to nitrogen ratio, available P, and available K contents of soils of Abobo area.
| Pedon | Horizon | Depth (cm) | OC (%) | TN (%) | C : N | Available P (mg kg−1) | Available K (mg kg−1) |
| A-1 | Ap | 0–18 | 2.64 | 0.20 | 13 | 25.34 | 295 | Bw1 | 18–25 | 1.72 | 0.13 | 13 | 17.28 | 285 | Bw2 | 25–35 | 0.84 | 0.05 | 16 | 6.09 | 301 | CB | 35–110 | 0.56 | 0.04 | 13 | 7.15 | 274 |
| A-2 | A | 0–18 | 1.98 | 0.18 | 11 | 47.84 | 780 | Ad | 18–27 | 1.19 | 0.08 | 15 | 22.50 | 750 | Bt1 | 27–37 | 0.61 | 0.05 | 12 | 10.26 | 581 | Bt2 | 37–50 | 0.52 | 0.04 | 13 | 16.37 | 473 | BC | 50–80 | 0.31 | 0.02 | 15 | 9.20 | 330 |
| A-3 | Ap | 0–22 | 1.32 | 0.11 | 12 | 50.00 | 700 | A | 22–33 | 0.75 | 0.07 | 11 | 31.35 | 615 | Bt1 | 33–45 | 0.63 | 0.05 | 13 | 14.20 | 439 | Bt2 | 45–63 | 0.42 | 0.03 | 14 | 10.86 | 201 | BC | 63–90 | 0.27 | 0.03 | 9 | 8.11 | 134 |
| A-4 | Ap | 0–10 | 2.98 | 0.24 | 12 | 88.40 | 1155 | A | 10–19 | 2.79 | 0.21 | 13 | 60.35 | 1079 | Bt1 | 19–37 | 1.52 | 0.11 | 13 | 33.12 | 754 | Bt2 | 37–75 | 0.80 | 0.07 | 11 | 8.38 | 180 | BC | 75–85 | 0.60 | 0.05 | 12 | 6.79 | 236 |
| A-5 | Ap | 0–17 | 1.94 | 0.14 | 14 | 16.28 | 115 | A | 17–55 | 1.28 | 0.16 | 8 | 11.35 | 150 | Bss1 | 55–116 | 0.76 | 0.05 | 15 | 6.08 | 115 | BCss2 | 116–150 | 0.44 | 0.03 | 14 | 7.43 | 123 |
| A-6 | Ap | 0–20 | 2.59 | 0.23 | 11 | 108.32 | 755 |
| A-7 | A | 0–29 | 2.10 | 0.20 | 10 | 4.92 | 210 | Bss1 | 29–48 | 1.40 | 0.11 | 13 | 2.37 | 186 | Bss2 | 48–105 | 0.48 | 0.04 | 12 | 0.22 | 130 | BCss | 105–150+ | 0.28 | 0.02 | 14 | 1.44 | 145 |
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