BAON, J. B. Use of Plant Derived Ash as Potassium Fertilizer and Its Effects on Soil Nutrient Status and Cocoa Growth. JOURNAL OF TROPICAL SOILS, [S. l.], v. 14, n. 3, p. 185–193, 2009. DOI: 10.5400/jts.2009.v14i3.185-193. Disponível em: https://journal.unila.ac.id/index.php/tropicalsoil/article/view/85. Acesso em: 19 jul. 2025.