Dr. Colin Gray

Senior Scientist

E: Colin.Gray@agresearch.co.nz


BSc Waikato
MSc Waikato
PhD Lincoln

Research interests & activities

  • Biogeochemistry of nutrients (phosphorus) and pollutants (heavy metals) in soils
  • Remediation of contaminated soils
  • Environmental monitoring


2013 Best paper at the 2013 New Zealand Land Treatment Collective Conference, Blenheim

2005 Keynote Speaker at International Workshop on Sustainable Development of Heavy Metal Contaminated Sites. Antwerp, Belgium

2002 Best poster award at World Congress of Soil Science, Bangkok, Thailand


Gray, C.W., Dunham, S.J., Dennis, P.G., Zhao, F.J., and McGrath, S.P. (2006). Field evaluation of in situ remediation of a heavy metal contaminated soil using lime and red-mud. Environmental Pollution 142, 530-539.

Gray, C.W., and McLaren, R.G. (2006). Factors affecting heavy metal solubility in some New Zealand soils. Water, Air and Soil Pollution 175, 3-14.

Gray, C.W., McLaren, R.G., Gunther, D. and Sinaj, S. (2004). An assessment of cadmium availability in Cd-contaminated soils using Isotope Exchange Kinetics (IEK). Soil Science Society of America Journal  68, 1210-1217.