Figure 7 Images of the soil surface by stereomicroscopy: (a) 0% gravel coverage before a rainfall event; (b) 0% gravel coverage after a rainfall event; (c) 20% gravel coverage before a rainfall event; (d) 20% gravel coverage after a rainfall event; (e) 40% grave coverage before a rainfall event; (f) 40% gravel coverage after a rainfall event; (g) 60% gravel coverage before a rainfall event; and (h) 60% gravel coverage after a rainfall event
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