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Soil ecology.

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View Resource Biological Soil Crusts

Biological soil crust probably isn't the first thing that springs to mind when snapping that photo of the Delicate Arch at Arches National Park. However, without the algae, mosses, cyanobacteria, and other tiny organisms that inhabit the surface of desert soils, places like Arches and other arid environments would be quite different. The US Geological Survey provides an online guide to biological...

http://www.soilcrust.org/
View Resource Frozen Soil

This Topic in Depth explores the world of frozen soil, including permafrost and tundra. The first site is provided by the Missouri Botanical Gardens Web site, entitled Tundra (1). This kids focused site does a good job of clearly explaining what tundra is, where it's located, and what types of plants and animals are found within tundra areas, as well as offering a photo gallery. The second site,...

https://scout.wisc.edu/report/nsdl/ps/2003/0124
View Resource Natural Resources Conservation Service: Soil Education

The Natural Resources Conservation Service provides an array of materials to assist people with their understanding of soils. Through an online presentation, users can learn ten key points about soil characteristics and their importance. Teachers and students can find many fun activities including soil erosion and particle size demonstrations and soil songs. The website provides a great...

https://www.nrcs.usda.gov/wps/portal/nrcs/main/soils/edu/