 |
| cation exchange: 35 phrases in 13 subjects |
| Agriculture | 8 |
| Analytical chemistry | 1 |
| Chemistry | 7 |
| Construction | 2 |
| Earth sciences | 1 |
| Environment | 1 |
| Food industry | 2 |
| General | 1 |
| Genetics | 3 |
| Life sciences | 2 |
| Natural resourses and wildlife conservation | 5 |
| Natural sciences | 1 |
| Water supply | 1 |