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. 2021 Aug 4;376(1834):20200181. doi: 10.1098/rstb.2020.0181

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© 2021 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 2. — Global map of (a) soil N concentration in 0–5 cm depth (cg/kg; [42,43]), (b) production of food calories (kCalories; 1997–2003; [41]), and (c) production of feed calories (kCalories; 1997–2003; [41]).