Syarifah, R. N. K., Purwanto, and H. Hanifa. “Optimum Dosage of N Determination in Achieve Optimization of Hybrid Rice Grain Contents Percentage”. Jurnal Online Pertanian Tropik, vol. 9, no. 1, June 2022, pp. 026-31, doi:10.32734/jopt.v9i1.8597.