Application of Bokashi Botom Ash for Increasing Upland Rice Yield and Decreasing Grain Pb Content in Vitric Hapludans. j Trop. Soils [Internet]. 2012 Nov. 13 [cited 2025 Nov. 3];17(2):157-63. Available from: https://journal.unila.ac.id/index.php/tropicalsoil/article/view/147