We have been covering many of these aspects of soil in recent blog entries and this video sums them up pretty well. I plan on covering a few more aspects of soil in the near future. Then we will be moving on from soils to plants and animal ecology.
http://www.nrcs.usda.gov/wps/portal/nrcs/home
NRCS soil mapping tool: http://websoilsurvey.nrcs.usda.gov/app/HomePage.htm
NRCS soil mapping tool: http://websoilsurvey.nrcs.usda.gov/app/HomePage.htm
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