Figure 1

The effects of different years’ continuous-cropping on strawberry soil properties such as soil pH (a), soil organic carbon concentration (g C kg−1 soil) (b), total soil nitrogen concentration (g N kg−1 soil) (c) and microbial biomass nitrogen (mg ∙ kg−1) (d). Bars indicate standard deviation. Different letters indicate significant differences among different years of continuous cropping strawberry (ANOVA: Duncan test; P < 0.05).