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Amounts of N derived from 15N-labeled source in each tissue of soybean plants on 24 DAP supplied for 3 days from 21 to 24 DAP (Experiment 3). (A) Nodules. (B) Roots. (C) Stems. (D) Leaves. Averages and standard errors are shown (n = 4). Different letters above the column indicate significant differences among each treatment at <0.05 by Tukey’s test.
