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“Bacteria are so small they need to stick to things or they will wash away; to attach themselves, they produce a slime, the secondary result of which is that individual soil particles are bound together. [...] Fungal hyphae, too, travel through soil, sticking to them and binding them together, thread-like, into aggregates. [...] The soil food web, then, in addition to providing nutrients to roots in the rhizosphere, also helps create soil structure: the activities of its members bind soil particles together even as they provide for the passage of air and water through the soil. [...] The nets or webs fungi form around roots act as physical barriers to invasion and protect plants from pathogenic fungi and bacteria. Bacteria coat surfaces so thoroughly, there is no room for others to attach themselves. If something impacts these fungi or bacteria and their numbers drop or they disappear, the plant can easily be attacked.” — Jeff Lowenfels