fetida increased with increased Hg concentrations.
The worms showed less weight loss in the organic carbon-rich soil (S-3) compared to less organic carbon containing soils (S-1 and S-2). fetida in three soils ranged from 5 to 65 %. fetida (LC 50) after 28 days of exposure in S-1, S-2 and S-3 soils were 152, 294 and 367 mg kg −1, respectively. The concentrations of total Hg that caused 50 % lethality to E. The toxicity studies revealed that Hg exerted less lethal effect on earthworms in acidic soil with higher organic carbon (S-3 soil) where water soluble Hg recovery was very low compared to the water soluble Hg fractions in soils with less organic carbon and higher pH (S-1 and S-2 soils).
Sub-chronic Hg toxicity tests were carried out with Eisenia fetida in spiked soils by exposing the worms for 28 days following standard procedures. Three different soils were spiked with 12 different concentrations of inorganic mercury (Hg).
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