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3D representation of clay soils under different cropping systems visualised at core (40 μm resolution; a, c, e) and aggregate (1.5 μm resolution; b, d, f) scales, displayed as thresholded images denoting pore (green) or solid (brown) phases. (a, b) bare fallow; (c, d) arable; (e, f) grassland. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)
