Since 2005
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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.
http://www.humate.info/
A non-governmental, nonprofit organisation fostering the application of scientific and practical methods for the general improvement of the soil through the use of fertilizers, especially potash.
http://www.ipipotash.org/
Manual, tutorial, and interactive practice field cards for the Oklahoma Land Judging competition. Also provides information on past national competitions.
http://www.landjudging.com/
Up-to-date links to member firms, vendors, organizations, and information on pedology, edaphology, microbiology, bioremediation, stormwater, wetlands, nutrients, and more.
http://www.nscss.org/
Nonprofit association communicating responsible, economic management of soil, water, and crops in the environment.
http://www.ontariosoilcrop.org/
An environmental monitoring program that helps communities better understand salinity problems.
http://www.saltwatch.org.au/
Software and articles on waterlogging, soil salinity, land drainage, and reclamation, developed and written by R.J.Oosterbaan.
http://www.waterlog.info/