Soil is formed from various materials and forces interacting with eachother over time.

General Sources Return to the top	Soil Forming Factors URL: http://ltpwww.gsfc.nasa.gov/globe/forengeo/secret.htm Source: GLOBE Soil Science Education In the time it took to form one inch of soil... URL: http://ltpwww.gsfc.nasa.gov/globe/inch/soiltime.htm Source: GLOBE Soil Science Education Soil Forming Factors URL: http://www.soils.agri.umn.edu/academics/classes/soil2125/doc/slab2sff.htm Source: University of Minnesota: Soil 2125
Parent Material Return to the top	The Story of Rocks and Soil URL: http://ltpwww.gsfc.nasa.gov/globe/soilform/parmat.htm Source: GLOBE Soil Science Education Soil Organic Matter, Peatlands and Soil Erosion Cycle URL: http://www.soils.agri.umn.edu/academics/classes/soil2125/doc/slab10om.htm Source: University of Minnesota: Soil 2125 Parent Materials for Soil Formation URL: http://www.soils.agri.umn.edu/academics/classes/soil2125/doc/s2chap5.htm Source: University of Minnesota: Soil 2125 Parent Material URL: http://www.statlab.iastate.edu/soils/ssm/chap3i.html Source: U.S. Department of Agriculture: Soil Conservation Service: Soil survey manual A Simple Demonstration of Chemical and Physical Weathering URL: http://nesen.unl.edu/lessons/geology/weathering.html Source: University of Nebraska: Nebraska Earth Science Education Network: Geology Lessons: by Bob Feurer
Climate Return to the top	Climate and Biotic Factors URL: http://www.soils.agri.umn.edu/academics/classes/soil2125/doc/s2chap2.htm Source: Source: University of Minnesota: Soil 2125
Biota Return to the top	The Soil Biology Primer URL: http://soils.usda.gov/sqi/SoilBiology/soil_biology_primer.htm Source: U.S. Department of Agriculture: Natural Resources Conservation Service: Soil Quality Institute Soil Biology Information Resources URL: http://soils.usda.gov/sqi/SBinfo.htm Source: U.S. Department of Agriculture: Natural Resources Conservation Service: Soil Quality Institute Soil Biology and Soil Management URL: http://www.extension.umn.edu/distribution/cropsystems/components/7403_02.html Source: University of Minnesota Extension Service Soil Biology URL: http://interactive.usask.ca/skinteractive/modules/agriculture/soils/soilwht/soilwht_biol.html Source: Saskatchewan Interactive: Agriculture: Soils
Topography Return to the top	Topography URL: http://www.soils.agri.umn.edu/academics/classes/soil2125/doc/s2chap3.htmy= Source: University of Minnesota: Soil 2125
Time Return to the top	Time as a Soil Forming Factor URL: http://www.soils.agri.umn.edu/academics/classes/soil2125/doc/s2chap4.htm Source: University of Minnesota: Soil 2125 Return to the top