Fig. 1. Scanning electron micrographs of the whole clay fraction from the Webster soil; (A) low magnification scanning electron microscopy (SEM) illustrating large (5–20 µm) soil microaggregates and small (0.5–2 µm) discrete particles, (B) medium magnification SEM stereo pair of a typical soil microaggregate, and (C) high magnification SEM stereo pair illustrating small particles with platy (p), rounded (r), and nodular (n) morphologies.

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