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. 2016 Jul 8;411(1):139–150. doi: 10.1007/s11104-016-2961-7

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© The Author(s) 2016

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 3 — Yield-responses of wheat to N (urea) and P₂O₅ (di-ammonium phosphate, DAP) applications. Data are from 1193 and 1338 farmers in Punjab and Sindh Provinces, respectively, from a survey conducted in early 2015 from 2014 harvest data (Waqar Ahmad, personal communication, Food and Agriculture Organization of the United Nations, FAO, Islamabad)