Cover crops support the climate change mitigation potential of agroecosystems

13. De Notaris Chiara, Olesen Jørgen Eivind, Sørensen Peter, Rasmussen Jim. Input and mineralization of carbon and nitrogen in soil from legume-based cover crops. Nutrient Cycling in Agroecosystems 2020. https://doi.org/10.1007/s10705-019-10026-z 14. Carrer D, Pique G, Ferlicoq M, Ceamanos X, Ceschia E. What is the potential of cropland albedo man- agement in the fight against global warming? A case study based on the use of cover crops. Environ. Res. Lett. 2018; 13:44030. https://doi.org/10.1088/1748-9326/aab650 15. Panagos Panos, Ballabio Cristiano, Himics Mihaly, Scarpa Simone, Matthews Francis, Bogonos Mariia, et al. Projections of soil loss by water erosion in Europe by 2050. Environmental Science & Policy. 2021; 124:380–92. https://doi.org/10.1016/J.ENVSCI.2021.07.012 16. van Groenigen JW, Huygens D, Boeckx P, Kuyper TW, Lubbers IM, Ru¨ tting T, Groffman PM. The soil N cycle: new insights and key challenges. SOIL. 2015; 1:235–56. https://doi.org/10.5194/soil-1-235-2015 17. Liu Dan, Zhang Wushuai, Wang Xiaozhong, Guo Yanjun. Greenhouse gas emissions and mitigation potential of hybrid maize seed production in northwestern China 2021. https://doi.org/10.21203/rs.3.rs- 316315/v1 18. Wittwer Raphae¨l A., Dorn Brigitte, Jossi Werner, Marcel G. A. van der Heijden. Cover crops support ecological intensification of arable cropping systems. Scientific Reports. 2017; 7:41911. https://doi.org/ 10.1038/srep41911 PMID: 28157197 19. Li J, Xie RZ, Wang KR, Ming B, Guo YQ, Zhang GQ, Li SK. Variations in Maize Dry Matter, Harvest

Index, and Grain Yield with Plant Density. Agronomy Journal. 2015; 107:829–34. https://doi.org/10. 2134/agronj14.0522 20. IPPC. N2O EMISSIONS FROM MANAGED SOILS, AND CO 2 EMISSIONS FROM LIME AND UREA APPLICATION. 2006. https://www.ipcc-nggip.iges.or.jp/public/2006gl/pdf/4_Volume4/V4_11_Ch11_ N2O&CO2.pdf. Accessed 21 Nov 2023. 21. IPCC. INDIRECT N2O EMISSIONS FROM AGRICULTURE. https://www.ipcc-nggip.iges.or.jp/public/ gp/bgp/4_6_Indirect_N2O_Agriculture.pdf. Accessed 19.02.24. 22. Kaye Jason P., Quemada Miguel. Using cover crops to mitigate and adapt to climate change. A review. Agronomy for Sustainable Development. 2017; 37:4. https://doi.org/10.1007/s13593-016-0410-x 23. Eurostat. The official portal for European data. 2023. https://data.europa.eu/data/datasets?locale=en. Accessed 11 Nov 2022. 24. G S Marcillo F E Miguez. Corn yield response to winter cover crops: An updated meta-analysis. Journal of Soil and Water Conservation. 2017; 72:226–39. https://doi.org/10.2489/jswc.72.3.226 25. Abdalla Mohamed, Hastings Astley, Cheng Kun, Yue Qian, Chadwick Dave, Espenberg Mikk, et al. A critical review of the impacts of cover crops on nitrogen leaching, net greenhouse gas balance and crop productivity. Global Change Biology 2019; 25. https://doi.org/10.1111/gcb.14644 PMID: 30955227 26. Ruis Sabrina J., Blanco-Canqui Humberto. Sci-Hub | Cover Crops Could Offset Crop Residue Removal Effects on Soil Carbon and Other Properties: A Review. Agronomy Journal, 109(5), 1785 | https://doi. org/10.2134/agronj2016.12.0735 2017.

27. Notaris Chiara De, Olesen Jørgen Eivind, Sørensen Peter, Rasmussen Jim. Input and mineralization of carbon and nitrogen in soil from legume-based cover crops. Nutrient Cycling in Agroecosystems 2020. https://doi.org/10.1007/s10705-019-10026-z 28. Gaimaro J, Timlin D, Tully K. Comparison of cover crop monocultures and mixtures for suppressing nitrogen leaching losses. Agricultural Water Management. 2022; 261:107348. https://doi.org/10.1016/j. agwat.2021.107348 29. McCracken DV, Smith MS, Grove JH, MacKown CT, Blevins RL. Nitrate Leaching as Influenced by Cover Cropping and Nitrogen Source. Soil Science Society of America Journal. 1994; 58:1476–83. https://doi.org/10.2136/sssaj1994.03615995005800050029x 30. Ritter WF, Scarborough RW, Chirnside A. Winter cover crops as a best management practice for reduc- ing nitrogen leaching. Journal of Contaminant Hydrology. 1998; 34:1–15. https://doi.org/10.1016/ S0169-7722(98)00087-4 31. Brentrup Frank, Hoxha Antoine, Christensen Bjarne. Carbon footprint analysis of mineral fertilizer pro- duction in Europe and other world regions; 2016. 32. Hasler K., Bro¨ring S., Omta S. W.F., Olfs H. W. Life cycle assessment (LCA) of different fertilizer prod- uct types. European Journal of Agronomy. 2015; 69:41–51. https://doi.org/10.1016/J.EJA.2015.06.001 33. Kahrl Fredrich, Li Yunju, Su Yufang, Tennigkeit Timm, Wilkes Andreas, Xu Jianchu. Greenhouse gas emissions from nitrogen fertilizer use in China. Environmental Science & Policy. 2010; 13:688–94. https://doi.org/10.1016/J.ENVSCI.2010.07.006

34. Tian L, Cai Y, Akiyama H. A review of indirect N2O emission factors from agricultural nitrogen leaching and runoff to update of the default IPCC values. Environmental Pollution. 2019; 245:300–6. https://doi. org/10.1016/j.envpol.2018.11.016 PMID: 30447472 PLOS ONE Cover crops support the climate change mitigation potential of agroecosystems PLOS ONE | https://doi.org/10.1371/journal.pone.0302139 May 8, 2024 18 / 20