Slide show about Laboratory Inspections (by Jerry Gordon, Cornell Manager for Laboratory Safety) - these slides inform about how and what to do to ensure that the laboratory is safe.
Manual on Laboratory Safety and Hygiene compiled by Cornell University.
Soil Fertility @ Iowa State University, large link collection on a variety of related topics
Centro Internacional de Agricultura Tropical (CIAT), International Center for Tropical Agriculture. Headquarters: Cali, Colombia
International Centre for Research in Agroforestry (ICRAF), World Agroforestry Centre.
Headquarters: Nairobi, Kenya
International Center for Soil Fertility and Agricultural Development (IFDC). Headquarters: Alabama, U.S.A.
Global Forum on Agricultural Research (GFAR). Secretariat: Rome, Italy
Soil Science Daily, blog on current events in the agricultural, environmental and natural resource sciences
PhysicalGeography.net, ebook resource on related disciplines