Figure 2: The effects of different years’ continuous-cropping on strawberry soil phenolic acids concentration (μg ∙ g−1).

p-HBA, p-hydroxybenzoic acid; FA, ferulic acid; p-CA, cinnamic acid; CA, p-coumaric acid. Means followed by the same lowercase letters within the same phenolic acid/the same uppercase letters within total phenolic acid are not significantly different (ANOVA: Duncan test; P < 0.05).