Sukma, S. A. I., Rohmah, I. T. and Chusnah, M. (2026) “Formulating competitive marketing strategies for hydroponic lettuce: a study from an islamic boarding school agribusiness unit in Jombang”, Journal of Agricultural Socio-Economics (JASE), 6(2), pp. 93–105. doi: 10.33474/jase.v6i2.24342.