- Soil Science Society of America (SSSA)
Acquires and disseminates information about soils in relation to crop production, environmental quality, ecosystem sustainability, and more.
www.soils.org
- Dig It! The Secrets of Soil
Discover the amazing world of soils with images and information from the Dig It! The Secrets of Soil exhibit now on display at the Smithsonian's National Museum of Natural History.
forces.si.edu/soils/index.html
- Land Judging
Manual, tutorial, and interactive practice field cards for the Oklahoma Land Judging competition. Also provides information on past national competitions.
www.landjudging.com
- Humate Information and Research
Features the paper, Organic Matter, Humus, Humate, Humic Acid, Fulvic Acid and Humin: Their Importance in Soil Fertility and Plant Health by Dr. Robert E. Pettit.
www.humate.info
- Waterlogging and Salinity
Software and articles on waterlogging, soil salinity, land drainage, and reclamation, developed and written by R.J.Oosterbaan.
www.waterlog.info
- Global Soil Moisture Data Bank
From the Department of Environmental Sciences at Rutgers University.
climate.envsci.rutgers.edu/soil_moisture
- Soil Morphology, Classification, and Mapping
Provides an overview of soil formation, weathering, organic mater, U.S. taxonomy, and mapping.
www.soils.wisc.edu/courses/SS325/soilscience325.html
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