Effect of Nasa Liquid Organic Fertilizer (LOF) Concentration and Varieties on Growth and Production of Lettuce Plants (Lactuca Sativa L.) with the DFT Hydroponic System. IJATSS. 2024;2(1):79-92. Accessed June 16, 2026. https://www.penerbitjurnalinternasional.com/index.php/ijatss/article/view/240