Application of Empty Fruit Bunches of Oil Palm and Indigofera zollingeriana for Conservation of Oil Palm Plantation

Oil palm empty fruit bunches are materials used as organic fertilizers that can be applied to oil plantations, thereby reducing the use of inorganic fertilizers. Indigofera zollingeriana is an appropriate alternative interplant because its high branch and leaf development. Functions a ground cover supplier carbon stocks naturally plays role in water soil conservation. This study aims determine effect I. on land improvement support growth production. Variables observed included changes content, microorganism activity, stock. The results showed planted with given had higher moisture content. highest stock, vegetation stock were 81.6 t ha-1, 36.60 1.89 respectively. population activity microorganisms varies. total treated EFB 105 (10⁵CFU g-1), while lowest was 60 g-1). Planting providing increased groundwater reserves by 36.71%.