Budianta D, Wiralaga AYA, Lestari W. Changes in Some Soil Chemical Properties of Ultisol Applied by Mulch from Empty Fruit Bunches in an Oil Palm Plantation. j Trop. Soils [Internet]. 2018Apr.10 [cited 2025Aug.1];15(2):111-8. Available from: https://journal.unila.ac.id/index.php/tropicalsoil/article/view/47