MUHAMMAD JUWANDA, M. J. “Growth, Yield and Efficiency of Nitrogen Fertilization of Shallots in Dosage of Nitrogen Fertilizer and Cow Manure”. Jurnal Online Pertanian Tropik, vol. 10, no. 2, Nov. 2023, pp. 1-7, doi:10.32734/jopt.v10i2.9830.