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Daily records (mean ± SD) of (A) ammonium-nitrogen (NH3-N), (B) nitrite-nitrogen (NO2-N), (C) nitrate-nitrogen (NO3-N), and (D) phosphate (PO4-P) concentrations in the inorganic (N = 5) and organic (N = 5) fertilization tanks during the 30-day experimental period. The p-value in each panel indicates the significance level (*, α = 0.05) of the treatment effect based on repeated measures ANOVA.
