Hartono, Arief, Desi Nadalia, and Praja Hary Satria. “Exchangeable Aluminum and Available Phosphorus in the Soils of Bangka Belitung Province: Aluminium Dapat Dipertukarkan Dan Fosfor Tersedia Pada Tanah Di Provinsi Bangka Belitung”. Jurnal Ilmu Tanah dan Lingkungan 24, no. 1 (May 6, 2022): 20-24. Accessed October 4, 2022. https://jma.journal.ipb.ac.id/index.php/jtanah/article/view/40401.