Riau is one of the provinces that has high potential for natural resources, including forest and plantation areas. The forest area in Riau Province is about ± 5,392,336 Ha, while the area for oil palm plantations is ± 2,537,375 Ha and the area for rubber plantations is ± 494, 106 Ha (BPS Riau Province, 2019). Forest and plantation areas require fertile soil to increase productivity. The …