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Interaction effects between production system and ageing time on TPA20 of Longissimus thoracis muscle from calves of the Retinta breed throughout 21 post-mortem days of ageing on Hardness (A), Springiness (B) and Resilence (C). Values with the same letters (a, b, c) indicate homogeneous subsets for p = 0.05 between productions systems according to Tukey’s HSD test; ns = not significant; OG: organic grazing; OC: organic concentrate; CC: conventional concentrate.
