- Atmospheric Protection/Air Quality Control/Air Pollution 24
- Ecotoxicology 24
- Environment, general 24
- Environmental Chemistry 24
- Environmental Health 24
- Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution 24
- Science, Humanities and Social Sciences, multidisciplinary 22
- Science, multidisciplinary 22
- Plant Genetics and Genomics 20
- Pharmacology/Toxicology 17
- Plant Sciences 16
- Biochemistry, general 15
- Plant Breeding/Biotechnology 14
- Organic Chemistry 13
- Plant Anatomy/Development 13
- Chemistry/Food Science, general 12
- Cell Biology 11
- Plant Ecology 11
- Plant Systematics/Taxonomy/Biogeography 11
- Agriculture 10