A publication from the Utah State University describing soil salinity, its causes, ways of measuring and salt tolerances for many common plants. July 1997.
http://extension.usu.edu/publica/agpubs/salini.htm
Primary focus is on soils and below-ground processes in arid and semiarid ecosystems with emphasis on microbial ecology and plant-microorganism relationships (San Diego State Unive...
http://www.serg.sdsu.edu/SERG/
Educational site explaining the role of soil organisms and the nitrogen cycle.
http://www.soils.agri.umn.edu/academics/classes/soil2125/doc/slab9org.htm
An international organization of researchers, students, environmental professionals and others interested in the advancement and promotion of soil biology and ecology.
http://www.wcsu.ctstateu.edu/ses/ses.html
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