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Biomass average of maize plants collected at V5 (n = 12) and V15 (n = 6). Bars with the same letter are not significantly different (p < 0.05). Two groups of series of letters compare treatments from distinctly stage periods (a for V5 and xyz for V15). Treatments: C, Control; F, Urea-topdressing fertilization at V5; I, A. brasilense inoculant on seeds sowing; FI, F + I; S, Maize stover coverage; FS, F + S; IS, I + S; FIS, F + I + S.
