Ramlan, R., S. Hijrah, and A. Khaliq. “Analysis of Potassium (K) Uptake and Plant Growth of Lettuce (Lactuca Sativa L.): Effect of AB Mix Concentrations and NPK Fertilizer Doses”. Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering), vol. 14, no. 5, Oct. 2025, pp. 1925-34, doi:10.23960/jtepl.v14i5.1925-1934.