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.
Vision Learning
Visionlearning: Earth Cycles: The Phosphorus Cycle
An introduction to the significance of phosphorus in regards to living organisms. An explanation of the phosphorus cycle is discussed in different scenarios.
Other
Alberta Government: Choosing a Fertilizer
Site gives a fairly high level breakdown of the general contents of a fertilizer (the Nitrogen, Phosphorus, Potassium, and Sulfur content) and what that does for soil.
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.
Encyclopedia of Earth
Encyclopedia of Earth: Physics & Chemistry: Phosphate
Discusses what phosphates are, their role in the phosphorous cycle, where they occur in the natural world, their chemistry, and the impact of the use of phosphate fertilizers in agriculture.
University of California
Uc Davis Geo Wiki: Chemical Budgets of Oceanic Elements
To the extent that the composition of the ocean remains constant, the rate at which any one element is introduced into seawater must equal the rate of its removal. A listing of the various routes of addition and removal, together with...
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