| 名称: | |
| 描述: | |
| 公开/私有: | 公开 私有 |
| 标题: | |
| 描述: | |
| 公开/私有: | 公开 私有 |
分面检索
- 旱地 (4)
- 研究 (4)
- dry farming (2)
- 农业技术 (2)
- arid regions agriculture (1)
- asia (1)
- biodiversity conservation (1)
- climatic changes (1)
- conservation tillage (1)
- economic aspects (1)
- effect of human beings on (1)
- environmental aspects (1)
- farms, small (1)
- humus (1)
- natural disasters (1)
- nature (1)
- pedologie (1)
- poverty (1)
- prevention (1)
- social aspects (1)
主题
| 1. |
|
|
|
| 2. |
|
|
|
| 3. |
|
|
|
| 4. |
|
|
|
| 5. |
|
|
|
| 6. |
|
|
|
| 7. |
|
|
|
| 8. |
|
|
|
| 9. |
|
|
|
| 10. |
|
|
