Encyclopedia of Earth
Encyclopedia of Earth: Phosphorus
Information about the element, Phosphorus, atomic number 15. Covers physical and atomic properties, the phosphorus cycle, phosphorus chemistry, and how exposure to white phosphorus affects human health.
Encyclopedia of Earth
Encyclopedia of Earth: Biogeochemistry: Phosphorus Cycle
Article explaining what the phosphorus cycle is, where it occurs, its place in the biotic world, and the environmental impact of human activities on the phosphorus cycle. (Published: October 8, 2009)
Simon Fraser University
Chem1 Virtual Textbook: Chemical Budgets of Oceanic Elements
As part of the General Chemistry Virtual Textbook, this site examines a variety of topics related to the elements of the oceans. Topics covered include Phosphorus, Carbon, Bicarbonate, Calcite, and more.
US Geological Survey
Usgs: Water Science for Schools Pesticides Ground Water
This US Geological Survey site briefly discusses the basics of why pesticides are increasingly found in our ground water. Click Home to access the site in Spanish.
Other
Ed Hume Seeds: Testing Your Soil
Conduct a soil test to find out what nutrients your soil is lacking. This site gives directions on how to gather a soil sample and what nutrients you should test for to get the best soil.
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