The contribution of soil extract composition and cyclic moisture dynamics to the physicochemical aging of superabsorbent polyacrylic acid and polyacrylamide hydrogels.

T 2peak showed modest significance for the interaction between soil extracts and drying-rewetting cycles ( p = 0.011, ɳp 2 = 0.14), and for the three-way interaction among soil extracts, polymer type, and drying-rewetting cycles ( p = 0.018, ɳp 2 = 0.14).

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For both stability indices, the permuted ANOVAs revealed significances for polymer types ( p = 0.001, Table S2), whereas only τ max showed slight significance for the soil extracts including dH 2 O ( p = 0.04). τ YP showed high effect sizes of the polymer type and the soil extract with ɳp 2 = 0.51 (Table S2) and ɳp 2 = 0.20 while the interaction of both showed medium effect size of ɳp 2 = 0.12.

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