Table 1.
The physicochemical properties of the fallow and river valley soils used in the experiment
| Soil properties | Soil type | |
|---|---|---|
| Fallow | River valley | |
| Soil texture | ||
| Sand (%) | 87 | 82 |
| Silt (%) | 6 | 4 |
| Clay (%) | 7 | 14 |
| Moisture | 16 | 5 |
| pH | 6.1 | 8.6 |
| Total content | ||
| Organic C (%) | 1.8 | 0.2 |
| Organic C/total N | 12 | 4 |
| Organic C/total P | 100 | 12 |
| Organic C/total S | 55 | 5 |
| N (%) | 0.15 | 0.05 |
| S (%) | 0.03 | 0.05 |
| P (mg kg−1) | 182 | 168 |
| K (mg kg−1) | 514 | 1942 |
| Na (mg kg−1) | 25 | 137 |
| Mg (mg kg−1) | 1165 | 3372 |
| Zn (mg kg−1) | 46 | 44 |
| Ca (mg kg−1) | 1019 | 5133 |
| Extractable content (mg kg−1) | ||
| P (Olsen) | 1.3 | 6.4 |
| Ca | 604.7 | 559.1 |
| K | 22 | 66 |
| Mg | 64.4 | 43.1 |
| N-NH4 + | 2 | 1 |
| N-NO3 − | 10 | 3 |