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. 2018 Apr 30;203:277–288. doi: 10.1016/j.agwat.2018.03.027

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© 2018 The Authors

This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

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Fig. 5 — Inorganic N concentrations in different soil layers during the 2013 maize growing season. (RM-R-N260 and RM-R-N180: ridge in ridge mulched system at N application rates of 260 and 180 kg N ha⁻¹; RM-F-N260 and RM-F-N180: furrow in ridge mulched system at N application rates of 260 and 180 kg N ha⁻¹; F-N260 and F-N180: flat cultivation system at N application rates of 260 and 180 kg N ha⁻¹).