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Lecture

4. Soils.docx

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Department
Environmental Science
Course
ENVIRSC 1B03
Professor
Luc Bernier
Semester
Winter

Description
ENVIR SCI 1B03 January 23, 2014 Soils What is Soil? • Natural body consisting of layers or horizons and/or organic material of variable thickness depending on geographic area • Importance: support for food production – 90% from agriculture • Weathering produces soil o Physical, chemical and biological weathering • Why are soils important? o Main component of the nitrogen cycle – nitrifying bacteria o Impact on biodiversity – diverse ecosystem
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