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Variation of nitrate (NO3 -) concentration among seventeen species of microgreens ranked within low (<500 mg kg-1), middle (500-1,000 mg kg-1), high (1,000-2,500 mg kg-1), and very high (>2,500 mg kg-1) NO3 - content on a fresh weight basis according to Di Gioia et al. (2013). Data reported are means of three replications. Vertical bars represent the mean ± standard error; means followed by different letters are significantly different (P <0.05) by Duncan’s multiple range test.
