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Effects of nutrient solution concentration (NSC) on projected leaf area (A) and total leaf area (B) of O. pumila in experiment 1. The projected leaf area was measured every week after 21 days after the start of the treatment (DAT), and the total leaf area was measured at 63 DAT. The treatments were 0.125, 0.25, 0.5, and 1.0 NSC. Vertical bars indicate S.E. (n = 8). Different letters indicate significant differences among the treatments at p < 0.05 by Tukey–Kramer’s test.
