Soil:

http://school.discovery.com/schooladventures/soil/down_dirty.html

http://www.epa.gov/gmpo/edresources/soil.html

http://www.maf.govt.nz/mafnet/schools/kits/soil1.htm

Erosion:

http://www.cjnetworks.com/~sccdistrict/shw_agso/index.htm

http://www2.kenyon.edu/Projects/Farmschool/types/soil.htm

http://www.abag.ca.gov/bayarea/enviro/erosion/ecare.html

http://www.state.me.us/dep/blwq/doceducation/dirt.htm

http://www.weru.ksu.edu/vids/ (great live video)

 No-Till

 http://www.nrcs.usda.gov/Technical/Standards/nhcp.html  

http://www.cjnetworks.com/~sccdistrict/shw_rms/index.htm

 Crop Rotation

http://www.nrcs.usda.gov/Technical/Standards/nhcp.html 

http://www.cjnetworks.com/~sccdistrict/shw_rms/index.htm

 Terrace

http://www.nrcs.usda.gov/Technical/Standards/nhcp.html

http://www.cjnetworks.com/~sccdistrict/shw_rms/index.htm

 Grass Waterway

http://www.nrcs.usda.gov/Technical/Standards/nhcp.html

http://www.cjnetworks.com/~sccdistrict/shw_rms/index.htm

 Contour Farming

http://www.nrcs.usda.gov/Technical/Standards/nhcp.html

http://www.cjnetworks.com/~sccdistrict/shw_rms/index.htm

 Windbreaks

http://www.nrcs.usda.gov/Technical/Standards/nhcp.html

http://www.cjnetworks.com/~sccdistrict/shw_rms/index.htm

  Strip Cropping

http://www.nrcs.usda.gov/Technical/Standards/nhcp.html

http://www.cjnetworks.com/~sccdistrict/shw_rms/index.htm

 Cover Crop

http://www.nrcs.usda.gov/Technical/Standards/nhcp.html

http://www.cjnetworks.com/~sccdistrict/shw_rms/index.htm