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- soil fertility 1
- soil importance 1
- soil microbial biomass 1
- soil organic matter 3
- soil pollution 1
- soil quality 1
- soil structure 1
- soil study 1
- soil tillage 1
- soiuri de struguri 1
- sol arabil 1
- solfegii 1
- solidaritate lexicală 1
- solide 1
- solide transparente 1
- Soljeniţîn Alexandr (1918-2008) 2
- solonetzicitatea cernoziomului de sud 1
- solonetzicity southern chernozem 1
- soluble salts 1
- soluble solids determination 1