- Agriculture 8
- Atmospheric Sciences 5
- Environment, general 5
- Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution 5
- Civil Engineering 4
- Geotechnical Engineering & Applied Earth Sciences 4
- Hydrogeology 4
- Hydrology/Water Resources 4
- Building Materials 3
- Characterization and Evaluation of Materials 3
- Earth Sciences, general 3
- Landscape/Regional and Urban Planning 3
- Plant Biochemistry 3
- Space Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics) 3
- Sustainable Architecture/Green Buildings 3
- Transportation Technology and Traffic Engineering 3
- Water Quality/Water Pollution 3
- Science, Humanities and Social Sciences, multidisciplinary 2
- Science, multidisciplinary 2
- Soil Science & Conservation 2