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Restoring soil health to reduce irrigation demand and buffer the impacts of drought |
Rebecca SCHNEIDER1( ), Stephen MORREALE1, Zhigang LI2, Erin MENZIES PLUER3, Kirsten KURTZ4, Xilu NI5, Cuiping WANG6, Changxiao LI7, Harold VAN ES8 |
1. Department of Natural Resources, Cornell University, Ithaca, NY14853, USA 2. School of Agriculture, Ningxia University, Yinchuan 750021, China 3. Modeling and Spatial Analysis Lab, Department of Geography and Environmental Management, University of Waterloo, Waterloo, N2L 3G1, Canada 4. Cornell Soil Health Laboratory, Cornell University, Ithaca, NY14853, USA 5. Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration of North-western China, Ningxia University, Yinchuan 750021, China 6. State Key Laboratory of the Seedling Bioengineering, Ningxia Forestry Institute, Yinchuan 750004, China 7. College of Life Sciences, Southwest University, Chongqing 400715, China 8. Department Soil and Crop Sciences, Cornell University, Ithaca, NY14853, USA |
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Abstract Irrigation consumes three quarters of global water withdrawals each year. Strategies are needed to reduce irrigation water use, including increasing the efficiency of transfer methods and field application. Comprehensive restoration of soil health, specifically through organic matter amendments, can substantially reduce irrigation demand and increase crop yield. A program to restore severely degraded and desertified soils by incorporating coarse woodchips into the soil successfully increased rainfall capture and elevated soil moisture for several weeks between rainfall events at both Ningxia, north-west China and North Dakota, USA. With addition of fertilizer, woodchip incorporation further increased growth of wheat and alfalfa. Comprehensive soil health assessment of remnant grasslands was used to develop target reference soil profiles by which to guide restoration efforts. Given that most agricultural soils are degraded to some degree, soil health restoration can provide a powerful strategy toward achieving global food and water security.
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Keywords
drought
irrigation
restoration
soil health
woodchips
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Corresponding Author(s):
Rebecca SCHNEIDER
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Just Accepted Date: 30 June 2020
Online First Date: 20 July 2020
Issue Date: 28 July 2020
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