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A Germination percentage, B total mass, C root length, and D shoot length in different concentrations of Phragmites australis litter mediated agarose at different seed densities of Lactuca sativa. Values (per plant) are means as % of control treatments at each density ± standard errors (n = 3). Letters indicate homogenous subgroups (P ≤ 0.05) at each density in Duncan’s test
