Table 7. Areas of land suitable for growing crops in the Liudaogou watershed.
| Grade | Area (km2) | Percentage (%) |
| S1 | 0 | 0 |
| S2 | 0.40 | 6.7 |
| S3 | 1.19 | 20.0 |
| N | 4.34 | 73.3 |
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