It is usual practice of the farmers of southern China that, contrary to the compost, organic manures are decomposed under anaerobic condition with the mixture of muds, Various proportions of straws, muds, green manures and mineral fertilizers are compared in such a preparation and the effect of response to crops studied. Present article also find out that methane occupies about 70-80% of the total evolved gases, The pH value through out the whole decomposition process remains slightly acid. The mudportion shows great absorbing property and gives good nutritive value in sand culture experiment.