Open Access
Table 1
Physical and Chemical Characteristics of Acid Sulfate
Soil in Kalimantan | ||||
---|---|---|---|---|
Soil’s Characteristics a | Potential Acid Sulfate | Actual Acid Sulfate | ||
Upper Layer (0-50 cm) | Lower Layer (50-200 cm) | Upper Layer (0-50 cm) | Lower Layer (50-200 cm) | |
Soil Texture | Silt Clay (SiC) | Clay (C) | Silt Clay (SiC) | Clay (C) |
pH H2O (1:5) | 4.3 | 3.5 | 3.6 | 2.8 |
EC (1:5) (dS/m) | 7.25 | 7.32 | 5.69 | 4.34 |
C-organic (%) | 9.16 | 6.61 | 10.93 | 7.51 |
N-total (%) | 0.59 | 0.28 | 0.49 | 0.22 |
P2O5 HCl (mg/100 g) | 115 | 33 | 45 | 17 |
K2O HCl (mg/100 g) | 32 | 29 | 81 | 73 |
P2O5 Bray II (ppm) | 17.7 | 15.2 | 19.3 | 12.6 |
Exchangeable Ca (cmol/kg soil) | 5.11 | 4.61 | 4.12 | 3.49 |
Exchangeable Mg (cmol/kg soil) | 7.05 | 8.02 | 9.25 | 8.30 |
Exchangeable K (cmol/kg soil) | 0.56 | 0.43 | 0.89 | 0.37 |
Exchangeable Na (cmol/kg soil) | 6.01 | 4.91 | 14.87 | 9.70 |
KTK pH 7 (cmol/kg soil) | 31.5 | 28.9 | 37.2 | 33.5 |
Base saturation (%) | 49 | 55 | 42 | 40 |
Al saturation (%) | 35 | 47 | 71 | 67 |
Pyrite (%) | 1.12 | 1.35 | 1.07 | 2.38 |
aAverage value from 27 soil samples [3]
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