“EFFECT OF ALUMINUM ON PLANT GROWTH, PHOSPORUS AND CALCIUM UPTAKE OF TROPICAL RICE (Oryza sativa), MAIZE (Zea mays), AND SOYBEAN (Glycine Max)”. 2018. Indonesian Journal of Agricultural Science 1 (2): 51-62. https://epublikasi.pertanian.go.id/berkala/ijas/article/view/352.