Dr. Ed Gregorich

Image Edward Gregorich
Research Scientist

Soil carbon cycling; effects of changes induced by land management and agricultural practices on soil health.

Current research and/or projects

  • Understanding mechanisms in the biological stabilization of soil carbon
  • Managing carbon to promote soil productivity, health, and biodiversity in Canadian farmlands
  • Sustainable crop production in Canada under climate change
  • Supporting local food security by addressing challenges facing field production of vegetables in boreal and northern communities (collaborator)
  • Use of legume crops to enhance N use efficiency, carbon sequestration, soil health and soil biodiversity in three ecoregions chosen to represent the different climatic conditions of Canada (collaborator)
  • Elucidating and exploiting rhizosphere processes for improved soil health and productivity
  • Inferring the influence of agricultural management and other human activities on soil constituents relevant to soil health and function
  • Promoting soil carbon, biodiversity and health 

Professional activities / interests

2006-present     Adjunct Research Professor, Carleton University, Department of Geography & Environmental Studies

2005-2007        Chair, Soil Biology and Biochemistry Division, Soil Science Society of America

2002-2005        President, Canadian Society of Soil Science

2002-2006        Adjunct Professor, Queen’s University, Kingston, Ontario

2002-2005        Scientific advisor, US Consortium for Agricultural Soil Mitigation of Greenhouse Gases

2001                 Member of Intergovernmental Panel on Climate Change (IPCC) Working Group II. Lead author of Chapter 15 - North America. IPCC Third Assessment Report

2000-2003        Secretary, Canadian Agricultural Research Committee – Greenhouse Gases and Carbon Sequestration

1994-1997        Adjunct Professor, McGill University, Montreal, Quebec

Education and awards


1989: Ph.D., Soil Science, University of Guelph, Guelph, Ontario

1984: M.Sc., Soil Science, University of Saskatchewan, Saskatoon, Saskatchewan

1982: B.Sc., Agriculture, University of Saskatchewan, Saskatoon, Saskatchewan



2008: Member of the Intergovernmental Panel on Climate Change (Geneva, Switzerland), which shared the 2007 Nobel Peace Prize with Al Gore for “their efforts to build up and disseminate greater knowledge about man-made climate change, and to lay the foundations for the measures that are needed to counteract such change.”  Recognized by the IPCC and the Minister of Environment Canada for contributions to the IPCC as coauthor of chapters in two IPCC reports.

2007: Fellow, Soil Science Society of America

2007: Erskine Visiting Fellow, University of Canterbury, Christchurch, NZ

2006: Fellow, Canadian Society of Soil Science

1996: Agcellence Award, the highest Agriculture & Agri-Food Canada departmental award, for exceptional accomplishments


International experience and/or work

2006-2011        Canadian project coordinator of VIETCANSOL, a Canadian International Development Agency project involving on-farm adoption of soil and water conservation methods and introducing high-value crops in the mountainous zone of northern Vietnam


Key publications

  1. Zhang, L., Yang, X., Drury, C., Chantigny, M., Gregorich, E., Miller, J., Bittman, S., Dan Reynolds, W., Yang, J. (2018). Infrared spectroscopy estimation methods for water-dissolved carbon and amino sugars in diverse Canadian agricultural soils, 98(3), 484-499. http://dx.doi.org/10.1139/cjss-2018-0027

    2018 - View publication details

  2. Morrison, M.J., Cober, E.R., Gregorich, E.G., Voldeng, H.D., Ma, B., Topp, G.C. (2017). Tillage and crop rotation effects on the yield of corn, soybean, and wheat in eastern Canada, 98(1), 183-191. http://dx.doi.org/10.1139/cjps-2016-0407

    2017 - View publication details

  3. Gregorich, E.G., Janzen, H., Ellert, B.H., Helgason, B.L., Qian, B., Zebarth, B.J., Angers, D.A., Beyaert, R.P., Drury, C.F., Duguid, S.D., May, W.E., McConkey, B.G., Dyck, M.F. (2017). Litter decay controlled by temperature, not soil properties, affecting future soil carbon, 23(4), 1725-1734. http://dx.doi.org/10.1111/gcb.13502

    2017 - View publication details

  4. Peltre, C., Gregorich, E.G., Bruun, S., Jensen, L.S., Magid, J. (2017). Repeated application of organic waste affects soil organic matter composition: Evidence from thermal analysis, FTIR-PAS, amino sugars and lignin biomarkers, 104 117-127. http://dx.doi.org/10.1016/j.soilbio.2016.10.016

    2017 - View publication details

  5. Xueming Yang, Craig F. Drury, Shabtai Bittman, Martin Chantigny, Jim Miller, Edward G Gregorich, W. Dan Reynolds and Jingyi Yang. 2016. Applications of Mid-Infrared Spectroscopy to the Determinations of Soil Amino Sugars, POM-C and N and Water Soluble Carbon in Some Canadian Agricultural Soils. American Society of Agronomy | Crop Science Society of America | Soil Science Society of America, 2016-11-09. Phoenix, AZ. https://scisoc.confex.com/crops/2016am/webprogram/Paper99629.html

    2016 - View publication details

  6. Yanni, S.F., Janzen, H.H., Gregorich, E.G., Ellert, B.H., Larney, F.J., Olson, B.M., Zvomuya, F. (2016). Organic carbon convergence in diverse soils toward steady state: A 21-year field bioassay, 80(6), 1653-1662. http://dx.doi.org/10.2136/sssaj2016.07.0214

    2016 - View publication details

  7. Diochon, A., Gregorich, E.G., Kellman, L., Morrison, M., Ma, B.L. (2016). Greater soil C inputs accelerate loss of C in cropping systems with low N input, 400(1-2), 93-105. http://dx.doi.org/10.1007/s11104-015-2718-8

    2016 - View publication details

  8. Diochon, A., Gillespie, A.W., Ellert, B.H., Janzen, H.H., Gregorich, E.G. (2016). Recovery and dynamics of decomposing plant residue in soil: An evaluation of three fractionation methods, 67(2), 196-205. http://dx.doi.org/10.1111/ejss.12316

    2016 - View publication details

  9. Ma, B.L., Zheng, Z.M., Morrison, M.J., Gregorich, E.G. (2016). Nitrogen and phosphorus nutrition and stoichiometry in the response of maize to various N rates under different rotation systems, 104(1), 93-105. http://dx.doi.org/10.1007/s10705-016-9761-6

    2016 - View publication details

  10. Yang, X.M., Drury, C.F., Bittman, S., Chantigny, M.H., Miller, J.J., Gregorich, E.G., Reynolds, W.D., and Yang, J.Y. (2015). "Microbial Glucosamine, Galactosamine and Muramic Acids in Some Canadian Agricultural soils.", ASA-CSSA-SSSA International Annual Meeting: Synergy in Science. Partnering for Solutions, Minneapolis, MN, USA, November 15-18, 2015. (Poster)

    2015 - View publication details

  11. Schwager, E., VanderZaag, A.C., Wagner-Riddle, C., Crolla, A., Kinsley, C., and Gregorich, E.G. (2015). "N2O emissions and N-Leaching from Spring and Fall Applications of Digestate, Raw Dairy Manure and Urea.", Joint Assembly AGU-GAC-MAC-CGU, Montreal, QC, Canada, May 5-6, 2015. (Poster)

    2015 - View publication details

  12. Diochon, A., Gregorich, E.G., Ellert, B.H., Janzen, H.H., and Helgason, B.L. (2015). "The role of temperature and soil texture in decomposition: findings from a physical fractionation study.", Canadian Society of Soil Science Annual Conference, Montreal, QC, Canada, July 2015.

    2015 - View publication details

  13. Gillespie, A.W., Gregorich, E.G., Peak, D., and Helgason, B.L. (2015). "Instrumental Methods in Environmental Biogeochemistry.", - Encyclopedia of Analytical Chemistry, John Wiley & Sons, Ltd.

    2015 - View publication details

  14. Yang, X.M., Drury, C.F., Bittman, S., Chantigny, M.H., Miller, J., Gregorich, E.G., Reynolds, W.D., and Yang, J.Y. (2015). "Microbial glucosamine. Galactosamine, and muramic acids in some Canadian agricultural soils.", ASA-CSSA-SSSA International Annual Meeting: Synergy in Science. Partnering for Solutions, Minneapolis, MN, USA, November 15-18, 2015.

    2015 - View publication details

  15. Singh, J., VanderZaag, A.C., Crolla, A., Kinsley, C., Wagner-Riddle, C., and Gregorich, E.G. (2015). "The effect of nitrogen fixation on direct and indirect nitrous oxide emissions in dairy crop rotations.", Canadian Soil Science Society Conference, Montreal, QC, Canada, July 5-10, 2015. (Poster)

    2015 - View publication details

  16. VandenBygaart, A.J., Helgason, B.L., Konschuh, H.J., Bedard-Haughn, A., Gillespie, A.W., and Gregorich, E.G. (2015). "Stability of buried soil organic matter in cropland: What are the mechanisms?", Canadian Society of Soil Science Annual Conference, Montreal, QC, Canada, July 2015.

    2015 - View publication details

  17. Gregorich, E.G., Gillespie, A.W., Beare, M.H., Curtin, D., Sanei, H., Yanni, S.F. (2015). Evaluating biodegradability of soil organic matter by its thermal stability and chemical composition, 91 182-191. http://dx.doi.org/10.1016/j.soilbio.2015.08.032

    2015 - View publication details

  18. Qiu, Q., Wu, L., Ouyang, Z., Li, B., Xu, Y., Wu, S., Gregorich, E.G. (2015). Effects of plant-derived dissolved organic matter (DOM) on soil CO2 and N2O emissions and soil carbon and nitrogen sequestrations, 96 122-130. http://dx.doi.org/10.1016/j.apsoil.2015.07.016

    2015 - View publication details

  19. VandenBygaart, A.J., Gregorich, E.G., Helgason, B.L. (2015). Cropland C erosion and burial: Is buried soil organic matter biodegradable?, 239-240 240-249. http://dx.doi.org/10.1016/j.geoderma.2014.10.011

    2015 - View publication details

  20. Gregorich, E.G., Janzen, H.H., Helgason, B.L., and Ellert, B.H. (2015). "Nitrogenous gas emissions from soils and greenhouse gas effects.", Advances in Agronomy (Book series), 132, pp. 39-74. doi : 10.1016/bs.agron.2015.02.004

    2015 - View publication details