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Relative growth rate and doubling time of Azolla sp. samples exposed to different treatments. (a) Fresh weight, (b) dry weight, (c) doubling time, and (d) relative growth rate of Azolla sp. samples under different treatments (means ± standard errors from three independent experiments under different treatments: organic, inorganic and control). Different lowercase letters indicate significant differences between different treatments at p ≤ 0.05.
