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. 2019 Feb 8;7:e6412. doi: 10.7717/peerj.6412

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© 2019 Lian et al.

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.

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Respiration rates (A) and cumulative respiration (B) each treatment and the ratios of carbon-use efficiency and nitrogen-use efficiency (C). M-Sugarcane, sugarcane monoculture; I-Sugarcane, intercropped sugarcane. M-Soybean, soybean monoculture; I-Soybean, intercropped soybean.