TABLE 1.
Soil properties in different soil layers
| Soil propertya (unit) | 0-10cm layerb
|
10-20cm layer |
20-40cm layer |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Max | Min | Mean | CV (%) | Max | Min | Mean | CV (%) | Max | Min | Mean | CV (%) | |
| SOC (g/kg) | 41.20 | 17.01 | 27.26 A | 24.55 | 32.55 | 12.22 | 20.28 B | 30.70 | 15.59 | 3.04 | 6.47 C | 44.97 |
| TN (g/kg) | 4.74 | 1.77 | 2.93 A | 26.25 | 3.85 | 1.29 | 2.19 B | 32.11 | 1.94 | 0.32 | 0.78 C | 49.00 |
| TP (g/kg) | 1.17 | 0.42 | 0.78 A | 23.72 | 1.37 | 0.38 | 0.63 B | 31.06 | 1.02 | 0.20 | 0.42 C | 42.57 |
| C/N ratio | 12.66 | 9.11 | 10.94 A | 7.47 | 12.82 | 8.73 | 10.86 A | 8.71 | 14.55 | 7.19 | 10.01 B | 18.33 |
| TK (g/kg) | 27.87 | 6.50 | 14.84 A | 46.81 | 28.13 | 6.44 | 15.31 A | 45.66 | 29.14 | 6.07 | 15.44 A | 47.42 |
| AN (mg/kg) | 338.10 | 150.68 | 241.70 A | 19.63 | 290.33 | 121.28 | 185.59 B | 27.47 | 147.00 | 36.75 | 74.91 C | 35.73 |
| AP (mg/kg) | 97.00 | 7.75 | 40.54 A | 47.87 | 61.55 | 4.53 | 24.34 B | 51.52 | 35.14 | 2.20 | 7.45 C | 89.09 |
| Fe (g/kg) | 14.64 | 2.08 | 7.21 C | 46.43 | 20.58 | 1.70 | 10.88 B | 48.16 | 27.32 | 1.01 | 16.63 A | 35.14 |
| pH | 5.49 | 4.71 | 5.11 B | 3.90 | 5.53 | 4.75 | 5.10 B | 3.42 | 6.52 | 4.93 | 5.53 A | 5.82 |
| CEC (mol/g) | 18.75 | 8.14 | 11.83 A | 23.85 | 14.67 | 7.14 | 10.32 B | 19.56 | 13.17 | 6.73 | 9.31 B | 19.92 |
a
SOC, soil organic carbon; TN, total nitrogen; TP, total phosphorus; C/N ratio, carbon-to-nitrogen ratio; TK, total potassium; AN, available nitrogen; AP, available phosphorus; CEC, cation exchange capacity.
b
Soil properties are shown for three different soil layers, 0 to 10 cm deep (0-10cm), 10-20cm, and 20-40cm. The maximum value (Max), minimum value (Min), mean value (n = 26) (Mean), and coefficient of variation (CV) are shown. Different letters in the Mean columns indicate significant differences among soil layers at P < 0.05.