1. Department of Crop Science, Faculty of Agriculture, University of Peradeniya, Peradeniya, Sri Lanka
2. Rice Research and Development Institute, Department of Agriculture, Batalagoda, Sri Lanka
3. Sustainable Agriculture Research and Development Centre, Department of Agriculture, Makandura, Sri Lanka
4. Natural Resources Management Centre, Department of Agriculture, Peradeniya, Sri Lanka
5. Department of Geology, Faculty of Science, University of Peradeniya, Peradeniya, Sri Lanka