Biological Soil Crusts Biological soil crusts are commonly found in semiarid and arid environments throughout the world and are formed by living organisms and their by-products, creating a crust of soil particles bound together by organic materials.
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DesertUSA 2000 A monthly Internet-based magazine published by Digital West Media, Inc. Our purpose is to provide a tool for discovery; a publication which entertains, educates and explores with our readers, the beauty, life and culture of the North American deserts
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