Table 1. Physical and chemical characteristics of the tested soil.
| Index | SOC (g/kg) | OM (g/kg) | TN (g/kg) | NH+4-N (mg/kg) | NO−3-N (mg/kg) | TP (g/kg) | AP (mg/kg) | AK (mg/kg) | ESP (%) | pH |
|---|---|---|---|---|---|---|---|---|---|---|
| Depth | ||||||||||
| 20 cm | 16.04 | 27.65 | 1.18 | 11.30 | 193.96 | 5.34 | 112.91 | 126.97 | 12.32 | 8.40 |
| 40 cm | 10.52 | 18.14 | 0.97 | 7.41 | 256.21 | 3.92 | 42.06 | 130.99 | 14.47 | 8.50 |
| 60 cm | 8.12 | 14.00 | 0.86 | 9.12 | 286.87 | 3.14 | 121.57 | 143.05 | 16.87 | 8.57 |
Note:
The SOC, OM, TN, NH+4-N, NO−3-N, TP, AP, TK, ESP, AK refer to organic carbon, organic matter, total nitrogen, ammonium nitrogen, nitrate nitrogen, total phosphorus, available phosphorus, alkalinity, available potassium, respectively.