Carbon Nitrogen Phosphorus Water

» Biogeochemical Cycles    A brief look at the major nutrient cycles, including pictures.    http://www.colorado.edu/GeolSci/courses/GEOL1070/chap04/chapter4.html

» Olympic Hands on the Land - Cycles    From the National Park Service, animated diagrams of the water, nitrogen, and carbon cycles. Includes explanations.    http://www.nps.gov/olym/hand/nutrition1.htm

» Water What Ifs - Water Quality and Nitrates and Phosphates    Shows the inter-relationship of these surface water parameters.    http://www.ncsu.edu/sciencejunction/depot/experiments/water/lessons/np/