Quantitatively the dissolved organic carbon (DOC) content in the Organic fraction of municipal solid waste-amended soil was 41.6 with respect to the control at the start of the trials (0.037 g C kg1 soil dm and 1.54 g C kg1 soil dm for the control and Organic fraction of municipal solid waste-amended soil, respectively), and 2.5 at the end of the trials (0.048 g C kg1 soil dm and 0.12 g C kg1 soil dm for the control and Organic fraction of municipal solid waste-amended soil, respectively).