| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | soil fertility | Nigeria | Reliance on natural fertilization and crop rotation to maintain soil fertility is common | 1 |
| 2 | soil ph | Nigeria | In some parts of Africa, traditional farming methods prioritize maintaining slightly acidic soil for staple crops like maize and cassava. | 1 |
| 3 | soil testing | Nigeria | Less widespread due to a focus on traditional farming practices and limited access to resources | 1 |