Yogi Kurnia Putra, Des M, Irma Leilani Eka Putri and Violita Violita 2022. The Effect of Use Ground Coffee (Coffea arabica L.) as a addition Nutrition To The Growth of lettuce Plants (Lactuca sativa L.) In Hydroponics Systems. Prosiding Seminar Nasional Biologi. 1, 2 (May 2022), 1498–1508. DOI:https://doi.org/10.24036/prosemnasbio/vol1/274.