ENHANCING THE SANDY SOIL NITROGEN CONTENT OF THE SAMAS COASTAL AREA USING ANAEROBIC DIGESTION SLUDGE DERIVED FROM PALM OIL MILL EFFLUENT. JOURNAL OF TROPICAL SOILS, [S. l.], v. 31, n. 1, 2026. DOI: 10.5400/jts.v31i1.%p. Disponível em: https://journal.unila.ac.id/index.php/tropicalsoil/article/view/665. Acesso em: 31 jan. 2026.