“THE EFFECT RICE HUSK ASH ON AVAIBILITY AND P UPTAKE OF CORN (Zea Mays L.) ON ULTISOL”. BIOTIK: Jurnal Ilmiah Biologi Teknologi Dan Kependidikan, vol. 12, no. 1, Apr. 2024, pp. 23-32, https://doi.org/10.22373/biotik.v12i1.20091.