LABORATORY OBSERVATIONS ON C/N RATIO OF SOIL BY EARTHWORM INOCULATIONM.P. SINHA, ROHIT SRI VASTAVA, MANISH KUMAR AND M.P.N. SINGHAbstract Earthworms of soil sub-system gradually affect the C/N ratio and reduce it to make it available to plant. In order to have an insight of extent of reduction of C/N ratio only by earthworms, experiments were designed with sterilized soil and a locally available common earthworm Perionyx sansibaricus (Michaelsen). The C/N ratio of sterilized soil was examined and after inoculation with definite biomass the C/N ratio was estimated on 7th, 15th and 25th day after inoculation. The final reduction of C/N ratio was recorded to be 28.96%. This aspect of lowering of C/N ratio may be useful in the decomposition process of
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