Akbar, M. T., Suhardjono, H. and Sutini, S. (2025) “Application of POC Addition to Nutrients and its Effect on Planting Direction in Lettuce Plants in Vertical Hexagonal Aeroponics”, Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering), 14(5), pp. 1619–1626. doi: 10.23960/jtepl.v14i5.1619-1626.