Kusumastuti, Any. “Dinamika P Tersedia, PH, C-Organik Dan Serapan P Nilam (Pogostemon Cablin Benth.) Pada Berbagai Aras Bahan Organik Dan Fosfat Di Ultisols”. Jurnal Penelitian Pertanian Terapan 14, no. 3 (July 5, 2017). Accessed February 29, 2024. https://jurnal.polinela.ac.id/jppt/article/view/153.