THE IMPACTS OF MT. SEMERU VOLCANIC ASH ON THE NEARBY AGRICULTURAL LAND FERTILITY: A CASE STUDY OF APPLICATION OF BORE-HOLE AND GEOELECTRIC METHODS. GEOMATE Journal, [S. l.], v. 25, n. 111, p. 57–65, 2023. Disponível em: https://geomatejournal.com/geomate/article/view/3953. Acesso em: 19 apr. 2026.