Fahrul, Fahrul, and Munari Kustanto. “Peningkatan Keuntungan Usahatani Di Kabupaten Sidoarjo Melalui Optimasi Pemberian Air Dengan Program Linier”. Cakrawala 15, no. 2 (December 24, 2021): 188–212. Accessed April 21, 2026. https://cakrawalajournal.org/index.php/cakrawala/article/view/383.