Articles | Volume 16, issue 14
https://doi.org/10.5194/bg-16-2795-2019
https://doi.org/10.5194/bg-16-2795-2019
Reviews and syntheses
 | 
17 Jul 2019
Reviews and syntheses |  | 17 Jul 2019

Reviews and syntheses: Review of causes and sources of N2O emissions and NO3 leaching from organic arable crop rotations

Sissel Hansen, Randi Berland Frøseth, Maria Stenberg, Jarosław Stalenga, Jørgen E. Olesen, Maike Krauss, Paweł Radzikowski, Jordi Doltra, Shahid Nadeem, Torfinn Torp, Valentini Pappa, and Christine A. Watson

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AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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AR: Author's response | RR: Referee report | ED: Editor decision
ED: Reconsider after major revisions (12 Mar 2019) by Lutz Merbold
AR by Sissel Hansen on behalf of the Authors (11 Apr 2019)  Author's response   Manuscript 
ED: Publish subject to minor revisions (review by editor) (14 May 2019) by Lutz Merbold
AR by Sissel Hansen on behalf of the Authors (28 May 2019)  Author's response   Manuscript 
ED: Publish as is (18 Jun 2019) by Lutz Merbold
AR by Sissel Hansen on behalf of the Authors (24 Jun 2019)  Manuscript 
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Short summary
We discuss nitrous oxide (N2O) emissions and nitrate leaching in organic arable farming, and potential mitigation strategies. The losses are low under growing crops, but crop residues may induce larger losses. The correlation between yearly total N-input and N2O emissions is weak. Cover crops, except sole legumes, have the potential to reduce nitrate leaching but may enhance N2O emissions. Optimised synchrony of mineralisation with crop N uptake will enhance crop productivity and reduce losses.
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