Yafizham, Yafizham, and Muslim Abubakar. “Effect of Bio-Phosphate on Increasing the Phosphorus Availability, the Growth and the Yield of Lowland Rice in Ultisol”. JOURNAL OF TROPICAL SOILS 15, no. 2 (April 10, 2018): 133–138. Accessed July 30, 2025. https://journal.unila.ac.id/index.php/tropicalsoil/article/view/50.