“CHEMICAL AND MINERALOGICAL PROPERTIES OF ULTISOLS OF SASAMBA AREA, EAST KALIMANTAN”, Indones. J. Agric. Sci., vol. 2, no. 2, pp. 37–47, Oct. 2016, Accessed: Oct. 17, 2026. [Online]. Available: https://epublikasi.pertanian.go.id/berkala/ijas/article/view/395