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might be associated with Ninduced imbalances in different nutrients . This work on nitrogen confirmed that the same mechanism of physiological disruption found for acid rain impairment additionally applies to chronic N additions. These findings counsel that N additions can contribute to the identical reduction of biological Ca reserves that acid rain depletes. New analysis on the broader significance of Ca depletion signifies that the identical disruptions documented for purple spruce can occur for different tree species , eastern hemlock, balsam fir, and white pine, and that soilbased Ca manipulation can also alter critical mCa stocks. Abandoned coal mine sites have often been responsible for the acid mine drainage , a severe polluter of floor water provides. The supplies released by AMD embrace heavy metals , different hazardous substances, and acidity that is dangerous to aquatic life. Improved economical methods are wanted to take away these substances from water to forestall detrimental results on forest health. are reduced to gaseous nitric oxide , nitrous oxide , and molecular nitrogen underneath restricted oxygen circumstances . Soil pH affects denitrification price, potential denitrification, and the ratio between the 2 main products of denitrification . The ratio has an inverse relation with soil pH .
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