Open Access Research Paper Views (795) Toxic effect of superphosphate on soil ecosystem using earthworm Drawida willsi as test specimen Anindita Bhattacharya, Sanjat Kumar Sahu J. Biodiv. & Environ. Sci. 6(4), 220-226, April 2015. Keywords: Earthworm, Fertilizer, Superphosphate, Toxicity test Details