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Changes in endochitinase (A), chitobiosidase (B), and β-N-acetylglucosaminidase (C) activities measured during 60 days of microcosm incubation. Triplicate microcosms were supplemented with chitin obtained from shrimp waste or left unsupplemented at each of the time points for soils with native pH (5.7) and increased pH (8.7). Error bars represent standard errors (SEs) of the mean results of three replicate experiments.
