13. Beneficial Microorganisms
The web of life depends on microorganisms, a vast network of small, unseen allies that permeate the soil, water, and air of our planet. Many kinds of microorganisms existed for billions of years before any plants or animals came into being. Microorganisms created the atmosphere, turned bare rock and lava into soil, helped plants colonize land, and remain vital to the survival of plants, animals, and people today.
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Author(s): Kim M. Wilkinson, David P. Janos
Publication: Tropical Nursery Manual