1. Department of Soil Science and Agricultural Chemistry, Palli-Siksha Bhavana (Institute of Agriculture), Visva - Bharati, Birbhum, 731 236 Sriniketan, West Bengal, India
2. All India Network Project n Pesticide Residues, Department of Agricultural Chemicals, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, 741 252 Nadia, West Bengal, India
3. Department of Agricultural Chemicals, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, 741 252 Nadia, West Bengal, India