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Effects of three different photoperiods (12 h, 16 h, and 20 h) on the contents of six macro mineral elements, TN (A), P (B), K (C), Ca (D), Mg (E), and S (F), in tomato shoots. The data represent the mean of at least three biological replicates. Different letters indicate significant differences (LSD) (α = 0.05). TN, total nitrogen; P, phosphorus; K, potassium; Ca, calcium; Mg, magnesium; S, sulfur.
