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Carbon Cycle
http://www.biology.ualberta.
ca/facilities/multimedia/uploads/alberta/CarbonCycl
e.html…read more

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Background
Nitrogen makes up 78% of atmospheric gases
Plants take up nitrogen in form of nitrate ions by
active transport.
Decomposition replenishes nitrate ions in the soil.
There are 4 main stages in the nitrogen cycle and each
processes requires energy from ATP and involves
saprobiotic microrganisms…read more

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http://www.classzone.
com/books/ml_science_share/vis_sim/em05_pg20_n
itrogen/em05_pg20_nitrogen.swf…read more

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Eutrophication…read more

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