Gas samples of 300 ll were taken from each gas sampling port using gas-tight syringe every 2–4 d. The gas samples were analyzed for CH4, CO2, O2, and N2 concentrations using a gas chromatograph
Gas samples of 300 ll were taken from each gas sampling port using gas-tight syringe every 2–4 d. The gas samples were analyzed for CH4, CO2, O2, and N2 concentrations using a gas chromatograph