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Fig. 5. Distribution of total mineral N (NH₄ + NO₃ + NO₂) by soil depth following crop harvest. Each data point represents a mean mineral N concentration for the corresponding soil depth increment (0 to 15, 15 to 30, 30 to 60, 60 to 90, or 90 to 120 cm). Error bars show the LSD (P < 0.05) for mean comparisons within a depth increment. NS indicates differences were not significant.