Elizabeth Humphreys

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Liz led the Water Science Group at IRRI. Her research interests included:

  • increasing the productivity, profitability and resilience of rice-based cropping systems in the coastal zone of the Ganges Delta – through improved water management (especially drainage), improved varieties, and cropping system intensification and diversification (including non-rice crops and aquaculture)
  • development of technology packages for dry seeded rice for irrigated and partially irrigated environments across South Asia
  • evaluation of crop establishment, tillage and residue management options for rice-based cropping systems
  • evaluation of rice-based cropping system options and management technologies for their impacts on land and water productivity, and water savings in north west India

Liz has authored or co-authored about 50 publications in prestigious international journals, is a member of the editorial panels of Field Crops Research and Soil and Tillage, and is a Fellow of the Australian Institute of Agricultural Science and Technology.


  • Irrigated rice-based cropping systems (especially rice-wheat)
  • Water management
  • Soil, residue and nitrogen management


  • PhD in Agricultural Sciences, University of Melbourne, Australia (1987)
  • BAgrSc in Hons, University of Melbourne, Australia (1981)
  • DipEd, University of Melbourne, Australia (1972)
  • BSc in Hons (Organic Chemistry), University of Melbourne, Australia (1971)


  • Senior Scientist (water science), IRRI (2009-2014)
  • CPWF Theme Leader (water productivity), IRRI (2006-2009)
  • Research-Senior Research-Principal Research Scientist, CSIRO Land and Water, Griffith, Australia (1990-2006)
  • Research group leader (1998-2002)
  • Program Manager, Co-operative Research Centre for Sustainable Rice Production (1999-2005)
  • Experimental Scientist, CSIRO Plant Industry, Canberra, Australia (1986-1989)
  • Experimental Scientist, CSIRO Centre for Irrigation Research, Griffith, Australia (1985-1986)


  1. Balwinder-Singh, Eberbach, P.L., HUMPHREYS, E. and Kukal, S.S. (2011). The effect of rice straw mulch on evapotranspiration, transpiration and soil evaporation of irrigated wheat in Punjab, India. Agric. Water Manage 98, 1857-1855.
  2. Balwinder-Singh, HUMPHREYS, E., Eberbach, P.L, Katupitiya, A., Yadvinder-Singh and Kukal, S.S. (2011). Wheat growth, yield and water productivity as affected by rice straw mulch and irrigation. Field Crops Res. 121, 209-225.
  3. Sudhir-Yadav, HUMPHREYS, E., Kukal, S.S., Gurjeet Gill, and Rangarajan, R. (2010). Water balance and water productivity in dry seeded and puddled transplanted rice in Punjab, India. Field Crops Res. 120, 112-122.
  4. HUMPHREYS, E., Kukal, S.S., Christen, E.W, Hira, G.S., Balwinder-Singh, Sudhir-Yadav and Sharma, R.K. (2010). Halting the groundwater decline in north west india – which crop technologies will be winners? Adv. Agron. 109, 155-217
  5. O’Neill, C.J., HUMPHREYS, E., Louis, J. and Katupitiya, A. (2008). Maize productivity in Southern New South Wales under furrow and pressurised irrigation. Australian Journal of Experimental Agriculture 48, 285-295.
  6. Sidhu H.S., Manpreet-Singh, HUMPHREYS E., Yadvinder-Singh, Balwinder-Singh, Dhillon S.S., Blackwell J., Bector V., Malkeet-Singh and Sarbjeet-Singh. (2007). The Happy Seeder enables direct drilling of wheat into rice stubble. Australian Journal of Experimental Agriculture 47, 844-854.
  7. Bouman, B.A.M., HUMPHREYS, E., Tuong, T.P. and Barker, R. (2007). Rice and water. Advances in Agronomy 92, 187-237.
  8. HUMPHREYS, E., Lewin, L.G., Khan, S., Beecher, H.G., Lacy, J., Thompson, J., Batten, G.D., Brown, A., Russell, C., Christen, E.W. and Dunn, B. (2006). Integrated approaches to increasing water productivity in rice-based systems in south east Australia. Field Crops Research 97: 19-33.
  9. HUMPHREYS, E., Melhuish, F.M., White, R.J.G. and Xi Zhen-bang (1991). Flood irrigation of wheat on a transitional red-brown earth soil. II. Effect of duration of ponding on availability of soil and fertilizer nitrogen. Aust. J. Agric. Res. 42, 1037-1051.
  10. HUMPHREYS, E., Muirhead, W.A., Melhuish, F.M., White, R.J.G. and Blackwell, J.B. (1989). The growth and nitrogen economy of rice under sprinkler and flood irrigation in south-east Australia. II. Soil moisture and mineral N transformations. Irrig. Sci. 10, 201-213.