Widana, M., Antu, E.S. and Romi Djafar, R.D. 2020. RANCANG TUGAL PUPUK JAGUNG TIPE VERTICAL. JTPG (Jurnal Teknologi Pertanian Gorontalo). 5, 2 (Nov. 2020), 61 -. DOI:https://doi.org/10.30869/jtpg.v5i2.680.