Barus J. Phosphorus and Potassium Status in Paddy Soils (Sawah) of Central Lampung Regency. J. Il. Tan. Lingk. [Internet]. 2007 Apr. 1 [cited 2025 Dec. 29];9(1):16-9. Available from: https://journal.ipb.ac.id/jtanah/article/view/2385