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- soil 21
- soil aggragates 1
- soil algae 2
- soil amenndments 1
- soil and climatic conditions 1
- soil and geographic profile 2
- soil attachment 1
- soil compaction 3
- soil cover 1
- soil cultivation 1
- soil cut 2
- soil degradation 1
- soil environment 2
- soil evaluation 1
- soil fertility 2
- soil formation conditions 1
- soil geography 2
- soil humidity 1
- soil humification 1
- soil layer 2