Average concentrations (mg/g) of total polyphenol. The data shows the changes in average and standard deviation of 20 lettuces. *P<0.05, **P<0.01, and ***P<0.001 represent a significant difference compared with the control group.
Abbreviations: GLL, green leaf lettuce; RL, romaine lettuce; HL, head lettuce; CTL, control; GF, general fertilizer; TF, test fertilizer.

Korean J Clin Lab Sci 2024;56:384-9 https://doi.org/10.15324/kjcls.2024.56.4.384

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