The nitrogen content of the substrate influences the growth patterns of the
composting earthworms (Edwards, 1998; Suthar, 2007b). Suthar (2007a)
summarised that the physiochemical and nutrient characteristics of feed stocks
might be considered as an important factor related to earthworm growth. The
nitrogen content and/or C:N ratio of the feed stock can influence the earthworm
growth patterns in vermicomposting system (Suthar, 2007b). Earthworms
biomass and cocoon production rate is directly related to the type of earthworm
species as well as nature of worm feedstuff (Suthar and Ram, 2008)