| Variables |
Minimum |
Maximum |
Average |
Standard deviation |
| pHF |
3.08 |
7.79 |
6.68 |
0.69 |
| pHFOX |
0.6 |
7 |
4.82 |
1.58 |
| pHF-pHFOX |
1.27 |
6.37 |
1.8 |
1.51 |
| Organic matter (%) |
0.3 |
20.55 |
6.2 |
5.89 |
| Pyrite (%) |
< 0.01 |
1.19 |
0.15 |
0.31 |
| Fe (ppm) |
< 0.01 |
10.36 |
1.29 |
2.69 |
| Al (ppm) |
< 0.01 |
779 |
123 |
181.11 |
| PO4 (ppm) |
0.27 |
8.26 |
2.05 |
1.65 |
| Texture* |
C, SiC, SC, SCL, Si, L, SL, LS, S |
* : C = Clay, SiC = Silty clay , SC = Sandy clay, SiCL = Silty clay loam, SCL = Sandy
clay loam, Si =Silt, L = Loam, SL = Sandy loam, LS = Loamy sand, S = Sand |