Table 1. The initial properties of the soil in the study.
| Soil properties | Values | Method |
|---|---|---|
| pH | 6.38 | Measured by a portable pH meter. |
| Organic matter | 22.80 g kg−1 | Potassium dichromate volumetric method (Bao, 2000). |
| Total nitrogen (N) | 0.98 g kg−1 | Kjeldahl digestion method (Nelson & Somers, 1973) |
| Total phosphorus (P) | 0.57 g kg−1 | Molybdovanadate method (Soon & Kalra, 1995) |
| Available N | 143.1 mg kg−1 | Diffusion method (Bao, 2000) |
| Available P | 10.95 mg P205 kg−1 | Olsen’s method (Black, 1965) |
| Available K | 98.64 mg K2O kg−1 | Flame photometry (Walker & Barker, 1962) |