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Diversity and distribution of earthworms along with the various factors influencing their distribution viz. moisture content, soil temperature, pH, oxidizable organic matter, nitrogen, phosphorous, potassium and calcium were determined in a subtropical forest ecosystem in the foothills of the Shivalik Himalayas in India. Six species of earthworms representing the two families Octochaetidae and Megascolecidae, were recorded during our study period of 2007-08. Maximum density and biomass of worms recorded in the present study was 82 ± 22.5 m-2 and 11.2 ± 1.79 g m-2, respectively.
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Joshi et al. (2009) studied this question.