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See also:
  • BLM NSTC Soil Biological Communities for Kids [ Kids/Teens ] - Learn all about soil and the things that live in it.
  • The Dirt on Soil [ Teens/Mature Teens ] - Explore soil ecology, meet microscopic creatures, and journey underground in the virtual reality voyage of the Earthship. From the Discovery Channel school.
  • The Twelve Soil Orders [ Teens/Mature Teens ] - This system for classifying soils is one of the most widely used soil classification systems in the world. Includes a collection of information and images to illustrate the distribution, properties, ecological significance, and use of these 12 soil orders.
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Last update: November 24, 2013 at 23:43:02 UTC - edit