Horizon | Depth (cm) | Sand g∙kg−1 | Silt g∙kg−1 | Clay g∙kg−1 | BD g∙cm−3 | MC (%) | pH KCl | OC g∙kg−1 | AVP mg∙kg−1 | TEB cmol/ kg | TEA cmol/ kg | ACEC cmol/ kg | BS (%) |
Coastal plain |
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A | 0 - 22 | 870.2 | 29 | 100.8 | 1.00 | 61.2 | 4.21 | 6.97 | 10.2 | 5.13 | 1.21 | 12.25 | 82.34 |
AB | 22 - 44 | 869.6 | 32.8 | 97.6 | 1.01 | 72 | 4.16 | 6.73 | 7.50 | 4.26 | 0.35 | 8.36 | 92.4 |
Bt1 | 44 - 72 | 849.6 | 12.8 | 137.6 | 1.18 | 74.75 | 4.11 | 5.92 | 7.66 | 4.57 | 0.34 | 8.82 | 93.08 |
Bt2 | 72 - 100 | 820.8 | 39 | 140.2 | 1.24 | 66.06 | 4.32 | 5.72 | 5.30 | 3.07 | 0.39 | 4.40 | 88.7 |
Bt3 | 100 - 180 | 849.6 | 32.8 | 117.6 | 1.28 | 51.70 | 4.22 | 5.34 | 6.70 | 3.05 | 0.28 | 4.25 | 91.6 |
MEAN |
| 851.96 | 29.28 | 118.8 | 1.14 | 65.14 | 4.20 | 6.14 | 7.47 | 4.02 | 0.51 | 7.62 | 89.62 |
SD |
| 20.16 | 9.89 | 19.91 | 0.1301 | 9.17 | 0.078 | 0.69 | 1.79 | 0.93 | 0.391 | 3.35 | 4.401 |
CV% |
| 2.37* | 33.74** | 16.76** | 11.40* | 14.08* | 1.86* | 11.24* | 23.93** | 23.08** | 76.08*** | 44.11*** | 4.91* |
Imo clay shale | |||||||||||||
A | 0 - 19 | 629.6 | 192.8 | 177.6 | 1.13 | 51.8 | 3.86 | 15.20 | 16.6 | 4.7 | 1.54 | 12.21 | 73.32 |
AB | 19 - 42 | 549.6 | 312.8 | 137.6 | 1.18 | 50 | 4.00 | 12.80 | 13.5 | 2.71 | 1.5 | 8.62 | 64.37 |
Bt1 | 42 - 82 | 529.6 | 112.8 | 357 | 1.24 | 51.48 | 4.44 | 9.20 | 10.8 | 4.82 | 2.08 | 12.98 | 69.85 |
Bt2 | 82 - 133 | 769.6 | 12.8 | 217.6 | 1.26 | 33.24 | 4.03 | 8.60 | 8.6 | 2.82 | 2.00 | 8.84 | 58.51 |
Bt3 | 133 - 180 | 549.6 | 232.8 | 217.6 | 1.35 | 36.51 | 3.80 | 7.30 | 9.7 | 3.63 | 1.80 | 10.86 | 66.90 |
MEAN |
| 605.6 | 172.8 | 221.5 | 1.23 | 44.60 | 4.03 | 10.62 | 11.84 | 3.74 | 1.78 | 10.70 | 66.59 |
SD |
| 99.39 | 114.89 | 82.69 | 0.084 | 8.98 | 0.25 | 3.273 | 3.224 | 1.001 | 0.262 | 1.95 | 5.61 |
CV% |
| 16.41** | 66.49*** | 37.43*** | 6.78* | 20.14* | 6.22* | 30.82** | 27.33** | 26.79** | 14.69* | 18.27** | 111.50*** |
Asu River | |||||||||||||
A | 0 - 15 | 889.6 | 92.8 | 17.6 | 1.32 | 333.8 | 3.85 | 7.66 | 19.80 | 6.07 | 1.23 | 15.52 | 83.15 |
C | 15 - 35 | 669.6 | 292.8 | 37.6 | 1.48 | 352.6 | 3.42 | 5.21 | 12.10 | 5.06 | 1.00 | 12.16 | 83.49 |
R | 35 |
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MEAN |
| 779.6 | 192.8 | 27.6 | 1.40 | 343.2 | 3.64 | 6.43 | 15.95 | 5.56 | 1.12 | 13.80 | 83.32 |
SD |
| 155.5 | 141.42 | 14.142 | 0.113 | 13.29 | 0.304 | 1.73 | 5.5 | 0.714 | 0.163 | 2.4 | 0.2404 |
CV% |
| 19.95** | 73.35*** | 51.24*** | 8.08* | 3.87* | 8.37* | 26.92*** | 34.14** | 12.83* | 14.59* | 17.17** | 0.29* |