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Nitrate fertilizer stimulates greenhouse gas production in small streams http://apocadocs.com/s.pl?1238434195
Nitrous oxide is a potent greenhouse gas that has been accumulating in the atmosphere since the industrial revolution. It is well known that fertilizer can stimulate nitrous oxide production in soils, but less is known about nitrous oxide production in small streams which drain agricultural landscapes. Much of the cropland in the agricultural Midwest is drained by an extensive subsurface drainage network which delivers soil-derived nitrate to small streams where it may be converted to nitrous oxide. Given the large quantities of nitrogen that leach from agricultural soils and the predominance of small streams in Midwestern agricultural landscapes, small streams may an important source of nitrous oxide.... The study revealed that nitrous oxide is frequently produced in the sediments of small streams and that production rates were best explained by stream water nitrate concentrations. The highest production rates were observed during the winter and spring of the second year of the study when snow melt and rain flushed nitrate into the streams resulting in elevated stream water nitrate concentrations.
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[Read more stories about:
corporate farming, unintended consequences]
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'Doc Jim says:
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Fertilizing our way to climate warming? How efficient.
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