| |||
soil retention | |||
soil conservation | |||
soil conservancy | |||
earth conservancy |
土壤保 持 : 45 phrases in 9 subjects |
Agriculture | 12 |
Animal husbandry | 2 |
Desert science | 3 |
Earth sciences | 13 |
Ecology | 3 |
Electronics | 1 |
General | 1 |
Name of organization | 1 |
Technology | 9 |