• Mitigation of nitrogenous greenhouse gases from agriculture (ammonia, nitrous oxide)
  • Nitrogen fertilisers and sustainable agricultural production
  • Stabilised fertilisers (urease inhibitors, nitrification inhibitors)



Member of

  • Soil Science Australia. Treasurer (2010-2014), Vice President and Acting President of Victorian Branch (2014) 1997 -
  • Environment Institute of Australia and New Zealand. Associate Member 1999 - 2010


Selected publications


Investigator on

Additional Grant Information

  • 2011 MSLE ACG Development Fund (July 2011) "Impact of nitrification inhibitors on ammonia oxidizers in Australian agricultural soils'
    Collaborators: Lincoln University, New Zealand   


Education and training

  • PhD, University of Melbourne 1997
  • B.A., University of Melbourne 1992
  • B.Agr.Sci., University of Melbourne 1990



Available for supervision

  • Y

Supervision Statement

  • I am available for supervision of PhD, Masters by Research, Masters by coursework (Projects A and B) and Honours students.

    Projects that I supervise are in nitrogen management in agriculture from fertilisers, wastes and recycling systems. I have expertise in soil nitrogen transformations, use of enhanced efficiency fertilisers, gaseous emissions, and use of stable isotope tracing techniques, and both laboratory and field based projects are available.

    Recently completed Masters and Honours projects are;

      "Evaluation of a 15 N microplot study for estimating plant and soil recovery of fertilizer nitrogen applied with DMPP" (Hassan, Masters of Agricultural Science, Project B, completed)
     "Effects of Lockdown®, a new formulation of the urease inhibitor NBPT, on urea hydrolysis across different soils" ( Lu, Honours, Bachelor of Agricultural Science,completed)

    Current PhD students being supervised;

    "Enhancing Nitrogen Fertiliser Efficiency of wheat in elevated carbon dioxide environments" (H. Sultana, submitted Oct-2013)
    "The effect of soil and environmental variables on N2O leakage from nitrification" (R. Liu)
    "The environmental, economic and social impacts of applying dicyandiamide on a dairyfarm in south-western Victoria" (T. Huggins)
    "Efficiency of ammonium sulphate as a source of nitrogen and sulphur in wheat and canola cropping systems in south- eastern Australia" (M. Khan)