 |
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| soil conservation; soil protection | |||
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| soil protection | |||
| ground conservation | |||
| soil preservation | |||
| soil conservation; conservation of soil | |||
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охрана почвы : 31 phrases, 10 sujets |
| Agrochimie | 1 |
| Approvisionnement en eau | 1 |
| Construction | 3 |
| Écologie | 15 |
| Économie | 1 |
| Général | 4 |
| Industrie de l'énergie | 1 |
| Makarov | 3 |
| Ressources naturelles et conservation de la faune | 1 |
| Sylviculture | 1 |