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Unformatted text preview: C:N ratio of OM decreases with time and decomposition 10 Ammonia volatilization Loss of N in form of ammonia gas NH 4 + + OH- NH 3 (g) + H 2 11 Ammonium fixation NH 4 + becomes fixed in certain layer silicate minerals related to cation exchange Weathered micas, vermiculite Mineral must weather again to release ammonium 3 12 Nitrate leaching Because NO 3-not retained on CE complex Eutrophication 13 Runoff NH 4 + enters surface waters Attached to soil particles Fertilizer particles Eutrophication 14 Eutrophication Nutrients (such as N, P) added to surface waters in higher-than-natural quantities excessive growth or "blooms" of algae algal blooms to oxygen depletion fish kills 15 Eutrophic lakes...
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- Winter '07