Use of Seaweed Liquid Extract and Cow Urine for Lettuce Growth in Hydroponic SystemLaode Muhammad Harjoni Kilowasid, Sitti Fadhillah Arsani, Tresjia Corina Rakian, Rachmawati Hasid, Waode Siti Anima Hisein and Andi NurmasE3S Web Conf., 361 (2022) 04027DOI: https://doi.org/10.1051/e3sconf/202236104027