- Plant Sciences 24
- Ecology 22
- Agriculture 14
- Soil Science & Conservation 13
- Plant Physiology 11
- Organic Chemistry 8
- Plant Genetics and Genomics 8
- Biochemistry, general 7
- Chemistry/Food Science, general 7
- Plant Ecology 7
- Biodiversity 6
- Applied Ecology 5
- Community & Population Ecology 5
- Terrestial Ecology 5
- Environment, general 4
- Forestry 4
- Environmental Engineering/Biotechnology 3
- Science, Humanities and Social Sciences, multidisciplinary 3
- Science, multidisciplinary 3
- Anthropology 2