| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | nitrogen fixation | Western countries | Nitrogen fixation is crucial for sustainable agriculture and extensively studied in Western countries, involving synthetic fertilizers and genetic modification. | 6 |
| 2 | nitrogen fixation | Fertilizer industry | The concept of nitrogen fixation in the fertilizer industry involves producing nitrogen fertilizers for agricultural use. | 1 |