A NOVEL BELOWGROUND IN-SITU GAS LABELING APPROACH: CH<SUB>4</SUB> OXIDATION IN DEEP PEAT USING PASSIVE DIFFUSION CHAMBERS AND <SUP>13</SUP>C EXCESS Article Dorodnikov M., Fan L., Kuzyakov Y., Knorr K.H., Nilsson M.B. Science of the Total Environment. Elsevier B.V.. Vol. 806. 2022. 150457 p.