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| 有机质含量 | |||
| 有机物含量 | |||
| organic content: 23 phrases in 9 subjects |
| Agriculture | 1 |
| Earth sciences | 1 |
| Electronics | 1 |
| Engineering geology | 2 |
| Geology | 1 |
| Soil science | 1 |
| Technology | 13 |
| United Nations | 1 |
| Water resources | 2 |
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