Soils: the foundation of civilization

A primer on the importance of soil. After viewing this, you should be able to: Explain why the average person should care about SOIL. Explain the importance of soil organic matter, soil biodiversity and soil fertility to agriculture and ultimately, to civilization itself. Explain what humus is and why it is important.



http://www.youtube.com/watch?v=OjN9IhsIIGQ&hl=en

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