The conversion of peatlands into oil palm plantations has the potential to increase methane (CH₄) emissions, one of the greenhouse gases with a global warming potential 21 times greater than carbon dioxide (CO₂). The research was conducted in oil palm plantations aged 10, 12 and 14 years in both rhizosphere and non rhizosphere zones at PT Waimusi Agroindah. The results showed that the 12 ye…