Raidasari, F., and E. T. Sofyan. “The Potential of Various Composting Materials and Biochar As Soil Amendments to Increase Soil Nitrogen Availability (A Review)”. Jurnal Online Pertanian Tropik, vol. 12, no. 2, Oct. 2025, pp. 29-38, doi:10.32734/jpt.v12i2.16864.