Maintained by the Max Planck Institute for Chemistry, the Geochemistry of Rocks of the Oceans and Continents database (GEOROC) contains about 70,000 sample analyses. These include whole rock, mineral, and inclusion data from seven tectonic settings such as convergent margins, oceanic plateaus, and ocean islands. The database can be queried by several criteria including a handy precompiled file...

The National Soil Survey Center (NSSC), as part of the Natural Resource Conservation Service, maintains the Soil Survey Laboratory Soil Characterization Database. The application allows users to generate, print and download reports containing soil characterization data held by the NSSC Soil Survey Laboratory. Users are able to choose the location and particular pedon for each query and report...

The Nitrogen and Phosphorus Knowledge Web page is offered by Iowa State University Extension and the College of Agriculture. The publications page contains links to various newsletters, articles, publications, power point presentations, links to governmental publications, and more. For example, visitors will find articles written on phosphorous within the Integrated Crop Management Newsletter,...