Romadhon, Muhammad Rizal. “Soil Fertility Index on Rainfed and Irrigated Paddy Fields in Babat District, Lamongan”. Jurnal Keteknikan Pertanian 14, no. 3 (September 22, 2026): 335–363. Accessed September 24, 2026. https://journal.ipb.ac.id/jtep/article/view/71242.