Changes in the percentage elongation of non-UV-irradiated PE films before and after 63 and 126 days of biodegradation in soil in various treatments.

εr elongation at break (%), (Δ %) difference between percentage elongation of films before and after biodegradation process (shown as a percentage). Values accompanied by a similar letter are not significantly different according to Duncan's multiple- range test (P = 0.05). Each value represents the average of four replicates ± SD. (SP: Soil + non-UV-irradiated PE; SMP: Soil + Selected Microorganisms + non-UV-irradiated PE).