Resource Section for WATERSHED

| Introduction | Surface Water | Ground Water | Soil | Water Quality |

"Soil"

|| What is soil?|| Soil structure || Soil Components || Natural soil development  ||   ||Chemical processes in soils || Biological processes in soil || Activities|| Credits ||                                              

What is soil?

On Earth, soil is generally considered to be weathered material capable of supporting plant life. Soil forms through a variety of soil formation processes, and includes weathered rock "parent material" combined with dead and living organic matter and air. Soils are vital to all life on Earth because they support the growth of plants, which supply food and oxygen and absorb carbon dioxide and nitrogen.         (www.mo15.nrcs.usda.gov/.../ images/horizons.gif 215 x 271 pixels - 36k)

Activities:

|| Does it come from the soil ? || What is soil made of? || The five soil forming factors || || Soil horizination || Plant and soil relations || Soil texture analysis || How does land use affect infiltration and runoff?|| How does development affect runoff?|| Land use planning ||

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Last update 03-17-2006