ENVIR SCI 1B03 January 23, 2014
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