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      The potential to mitigate global warming with no-tillage management is only realized when practised in the long term

      , , , , ,
      Global Change Biology
      Wiley-Blackwell

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          A synthesis of carbon sequestration, carbon emissions, and net carbon flux in agriculture: comparing tillage practices in the United States

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            Greenhouse gases in intensive agriculture: contributions of individual gases to the radiative forcing of the atmosphere

            Agriculture plays a major role in the global fluxes of the greenhouse gases carbon dioxide, nitrous oxide, and methane. From 1991 to 1999, we measured gas fluxes and other sources of global warming potential (GWP) in cropped and nearby unmanaged ecosystems. Net GWP (grams of carbon dioxide equivalents per square meter per year) ranged from 110 in our conventional tillage systems to -211 in early successional communities. None of the annual cropping systems provided net mitigation, although soil carbon accumulation in no-till systems came closest to mitigating all other sources of GWP. In all but one ecosystem, nitrous oxide production was the single greatest source of GWP. In the late successional system, GWP was neutral because of significant methane oxidation. These results suggest additional opportunities for lessening the GWP of agronomic systems.
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              CARBON AND AGRICULTURE:Carbon Sequestration in Soils

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                Author and article information

                Journal
                Global Change Biology
                Global Change Biol
                Wiley-Blackwell
                1354-1013
                1365-2486
                February 2004
                February 2004
                : 10
                : 2
                : 155-160
                Article
                10.1111/j.1529-8817.2003.00730.x
                c410fb0b-f932-4162-b5c3-2310bc8b0969
                © 2004

                http://doi.wiley.com/10.1002/tdm_license_1.1

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