ABSTRACT Oil palm (Elaeis guineensis Jacq.) is one of Indonesia's prime crops. The Riau Province Plantation Office (2013) noted that in 2013 the area of oil palm plantations on peatland had reached around 1.2 million hectares. Of the total peatland area of oil palm plantations in Riau Province, there are different peat depths. The depth of peat determines the level of peatland production, becau…