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Water productivity benchmarks: The case of maize and soybean in Nebraska

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  • Mekonnen, Mesfin M.
  • Hoekstra, Arjen Y.
  • Neale, Christopher M.U.
  • Ray, Chittaranjan
  • Yang, Haishun S.

Abstract

Water productivity benchmarks for irrigated and rainfed agriculture will provide relevant information to manage scarce water resources and control groundwater level decline. We analyse the temporal and spatial variation of the water productivity (WP) of maize and soybean in Nebraska, with WP defined as harvested crop weight per total evapotraspiration. The results show that WP of both maize and soybean increase from west to east within Nebraska and have increased over the last 25 years, mainly due to the increase in crop yields (land productivity). We derive WP benchmarks for each crop per climate zone. Increasing actual WPs in the state to benchmark levels will increase yields by 21 % for maize and by 19 % for soybean. The WP benchmark levels for the two crops presented here will help formulating targets for closing water productivity gaps and improving the sustainability of water use in the state.

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  • Mekonnen, Mesfin M. & Hoekstra, Arjen Y. & Neale, Christopher M.U. & Ray, Chittaranjan & Yang, Haishun S., 2020. "Water productivity benchmarks: The case of maize and soybean in Nebraska," Agricultural Water Management, Elsevier, vol. 234(C).
    • Handle: RePEc:eee:agiwat:v:234:y:2020:i:c:s0378377419315598
    DOI: 10.1016/j.agwat.2020.106122
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    1. Xinchun Cao & Jianfeng Xiao & Mengyang Wu & Wen Zeng & Xuan Huang, 2021. "Agricultural Water Use Efficiency and Driving Force Assessment to Improve Regional Productivity and Effectiveness," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 35(8), pages 2519-2535, June.
    2. Zhu, Yichen & Ghoshray, Atanu, 2021. "Climate Anomalies and Its Impact on U.S. Corn and Soybean Prices," 2021 Conference, August 17-31, 2021, Virtual 315271, International Association of Agricultural Economists.

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