NURYANTO, Muhamad; MAHMUD, Mahmud. Analysis of swamp irrigation water quality for agricultural areas: Case study DIR Polder Kaludan, Hulu Sungai Utara Regency. Indonesian Journal of Social and Environmental Issues (IJSEI), [S. l.], v. 7, n. 1, p. 1–16, 2026. DOI: 10.47540/ijsei.v7i1.2614. Disponível em: https://ojs.literacyinstitute.org/index.php/ijsei/article/view/2614. Acesso em: 7 may. 2026.