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Lemke, Reynald, Ph.D.

Research Scientist

Contact Information:

51 Campus Drive
Saskatoon, Saskatchewan S7N 5A8
Telephone: 306-385-9444
Fax: 306-385-9482
Email: reynald.lemke@agr.gc.ca

Areas of Expertise:

  • Evaluate the influence of agricultural practices on greenhouse gas emissions and soil quality; identify farming practices that minimize greenhouse gas emissions and maintain or enhance soil quality; improve or develop methodologies for measuring and assessing greenhouse gas emissions from agricultural soils

Current Projects:

  • Methodology for quantifying GHG emissions/removals
  • Economics and non-renewable energy use effciency of tillage, fertilizer, and alternative crop management practices in the semiarid prairies.
  • Innovative Approaches to Land Management to Improve Nitrogen Management at the Field Level.
  • Understanding processes of GHG emissions/removal - soil C
  • Estimating net GHG emissions from whole farms
  • Understanding processes of GHG emission/removal - N2O, soil CH4
  • Swift Current long-term rotations
  • Short-rotation forage crops in the Brown soil zone

Affiliations:

  • Adjunct Professor, University of Saskatchewan, Department of Soil Science

Research publications

2019

2017

  • Dutta, B., Grant, B.B., Campbell, C.A., Lemke, R.L., Desjardins, R.L., Smith, W.N. (2017). A multi model evaluation of long-term effects of crop management and cropping systems on nitrogen dynamics in the Canadian semi-arid prairie, 151 136-147. http://dx.doi.org/10.1016/j.agsy.2016.12.003
  • Smith, E.G., Zentner, R.P., Campbell, C.A., Lemke, R., Brandt, K. (2017). Long-term crop rotation effects on production, grain quality, profitability, and risk in the northern great plains, 109(3), 957-967. http://dx.doi.org/10.2134/agronj2016.07.0420
  • This manuscript was submitted in May 2016 and approved by the acting associate director Susan Tosh. The publication was accepted for publication in February 2017. The citation will be provided, once the publication is posted on the Canadian Journal of Plant Science web page.
  • This manuscript was submitted in May 2016 and approved by the acting associate director Susan Tosh. The publication was accepted for publication in February 2017. The citation will be provided, once the publication is posted on the Canadian Journal of Soil Science web page. The publication date is a place holder
  • This manuscript will be submitted to the Canadian Journal of Soil Science pending approval by Dr. Sen Wang Associate Director RDT Brandon Research and Development Centre

2016

2015

2014

2013

2012

2011

2010

2009

Other science related publications

2018

  • Lychuk, T.E., Moulin, A.P., Lemke, R., Izaurralde, R., Johnson, E., Olfert, O., Brandt, S. 2018. Climate change, agricultural inputs, cropping diversity, and environment affect soil carbon, phosphorus, and nitrogen: a case study in Saskatchewan, Canada, Manitoba Soil Science Society Annual Meeting, Winnipeg, Manitoba, Feb 1, 2018

2017

  • Lychuk, T.E., Moulin, A.P., Lemke, R., Olfert, O., Johnson, E., Brandt, S. Izaurralde, R. 2018. Assessing and Predicting Effects of Input and Crop Diversity on Soil Nitrate, Extractable Phosphorus, and Organic Carbon from a Long-Term Rotation in the Semi-Arid Canadian Prairie. Canadian Society of Soil Science Annual Meeting, Trent University, Peterborough, Ontario, June 14, 2017

2016

  • Gossen, B.D., Bassendowski, K.A., Johnson, E.N., and Lemke, R. 2016. Effect of cropping rotation and input level across 18 years on the northern Great Plains. Phytopathology 106 (S4): 92.

2015

  • Baron, V.S., Lemke, R.L., Young, D.G., Harker, K.N., O'Donovan, J.T., and Flesch, T.K. (2015). "Ecosystem carbon balance of field-scale canola and barley in central Alberta.", 14th International Rapeseed Congress, Saskatoon, SK, Canada, July 5-9, 2015, Theme D. (Poster)
  • Congreves, K.A., Grant, B.B., Campbell, C., Smith, W.N., Worth, D.E., Vandenberg, A., Kröbel, R., Lemke, R.L., and Desjardins, R.L. (2015). "Measuring and modelling the long-term impact of crop management on soil C sequestration in the semi-arid Canadian prairies.", Canadian Soil Science Society (IUSS-CSSS-AQSSS) Conference, McGill University, Montreal, QC, Canada, July 5-10, 2015. (Poster)
  • Lemke, R.L., Baron, V.S., Lui, J.L., Farrell, R.E., and Knight, J.D. (2015). "Does canola influence soil-emitted nitrous oxide emissions from crop rotations on the Canadian prairies?", 14th International Rapeseed Congress, Saskatoon, SK, Canada, July 5-9, 2015. (Abstract)
  • Schellenberg, M.P., Bainard, J.D., Lamb, E.G., Lemke, R.L., and Cutforth, H.W. (2015). "Annual Forage Polycultures.", Western Canada Conference on Soil Health 2015, Edmonton, Alberta, Canada.

2014

  • Arcand, M.A., Helgason, B.L., Lemke, R.L., and Ellert, B.H. (2014). "Soil microbial communities and carbon utilization in diversified long-term conventional and organic management systems.", Ecological Society of America Annual Meeting, Sacramento, CA, USA, August, 2014, Presentation.
  • Comeau, L.-P., Lemke, R.L., Knight, J.D., and Bedard-Haughn, A. (2014). "Root and shoot carbon input from four prairie crop sequences using repeat 13C pulse labeling technique.", 2014 IUSS Global Soil Carbon Conference, Madison, Wisconsin, USA, June 3-6, 2014. (Abstract)
  • David, C., Lemke, R.L., Wahab, J., Helgason, W., and Farrell, R.E. (2014). "The effect of fall nitrogen and cropping sequence on GHG emissions under irrigation.", Annual meeting of the Canadian Soil Science Society, Banff, Alberta, Canada, May 4-7, 2014. (Abstract)
  • David, C., Lemke, R.L., Wahab, J., Helgason, W., and Farrell, R.E. (2014). "The influence of irrigated crop management on soil greenhouse gas fluxes.", Soils and Crops Workshop 2014, University of Saskatchewan, Saskatoon, SK, Canada, March 11-12, 2014.
  • Farrell, R.E., Carverhill, J., Lemke, R.L., and Knight, J.D. (2014). "Partitioning residue-derived and residue-induced N2O emissions using 15N-labelled crop residues.", AGU Fall Meeting, San Fransisco, CA, USA, December 15-19, 2014. (Abstract)
  • Farrell, R.E., Lemke, R.L., and Knight, J.D. (2014). "Developing a case for lowering the N2O emission factors for crop residues.", Soils and Crops Workshop 2014, University of Saskatchewan, Saskatoon, SK, Canada, March 11-12, 2014.
  • Farrell, R.E., Lemke, R.L., and Knight, J.D. (2014). "Quantifying nitrogen loss from 15N-enriched crop residues.", Annual meeting of the Canadian Soil Science Society, Banff, Alberta, Canada, May 4-7, 2014. (Abstract)
  • Gan, Y.T., Chang, L., Lemke, R.L., Campbell, C.A., and Zentner, R.P. (2014). "Carbon Footprints for Wheat Cropping Systems in Semiarid Prairies.", Soils and Crops Workshop 2014, University of Saskatchewan, Saskatoon, SK, Canada, March 11-12, 2014.
  • Iwaasa, A.D., Baron, V.S., Lemke, R.L., Wang, H., Kröbel, R., Schellenberg, M.P., and McConkey, B.G. (2014). "AGGP Cropping System-Grassland Research and Extension: Semiarid Ecoregion.", AGGP cropping system – grassland research and extension: Semiarid Ecoregion, AAFC-Saskatoon, Saskatoon, Canada, March 20, 2014.
  • Johnson, E.N., Leeson, J.Y., Lemke, R.L., Olfert, O.O., and Moulin, A.P. (2014). "Effect of Cropping Diversity and Input System on Weed Populations in an 18-Year Cropping System Study.", 10th European Weed Research WRS Workshop on Physical and Cultural Weed Control, Alnarp, Sweden, March 16-19, 2014. (Abstract)
  • Lemke, R.L., Arcand, M.A., Knight, J.D., and Farrell, R.E. (2014). "Nitrogen supply from belowground residues of lentil and wheat to a subsequent wheat crop.", Soils and Crops Workshop 2014, University of Saskatchewan, Saskatoon, SK, Canada, March 11-12, 2014.
  • Pearce, R., Helgason, B.L., Lemke, R.L., and Farrell, R.E. (2014). "Are N2O emissions from long-term manure applications linked to microbial abundance?", Canadian Society of Soil Science Annual Meetings, Banff, AB, Canada, May 4-7, 2014, Presentation.
  • Pearce, R., Lemke, R.L., Helgason, B.L., and Farrell, R.E. (2014). "Assessing Potential Soil Microbial “Priming Effects” on N2O Emissions as a Result of a Fertilizer Change-Over from Long-Term Manure Applications to Urea.", Soils and Crops Workshop 2014, University of Saskatchewan, Saskatoon, SK, Canada, March 11-12, 2014.
  • Slater, K.S., Knight, J.D., Farrell, R.E., and Lemke, R.L. (2014). "The Influence of Legume Cropping Sequences on Above and Below Ground Carbon and Nitrogen Inputs.", Annual meeting of the Canadian Soil Science Society, Banff, Alberta, Canada, May 4-7, 2014. (Abstract)
  • Slater, K.S., Knight, J.D., Farrell, R.E., and Lemke, R.L. (2014). "The influence of legume cropping sequences on above and below ground carbon and nitrogen inputs.", Soils and Crops Workshop 2014, University of Saskatchewan, Saskatoon, SK, Canada, March 11-12, 2014.

2013

  • Hunt, D.E., Bittman, S., Kowalenko, C.G., Chantigny, M.H., and Lemke, R.L. (2013). "Winter time nitrous oxide emission from grass receiving whole and separated dairy slurry or fertilizer in a mild maritime climate.", ASA/CSSA/SSSA International annual meeting, Tampa, Florida, USA, November 3-6, 2013. (Abstract)

2012

  • Bittman, S., Hunt, D.E., Chantigny, M.H., Kowalenko, C.G., and Lemke, R.L. (2012). "Precision Manure Injection on Nitrogen Use and N2O Emissions in Corn.", 2012 ASA-CSSA-SSSA International Annual Meeting, Cincinnati, OH, USA, October 21-24, 2012. (Abstract)
  • Hunt, D.E., Bittman, S., Chantigny, M.H., Kowalenko, C.G., and Lemke, R.L. (2012). "Removing solids from dairy slurry: Effect on N use efficiency and emissions of N2O.", 2012 ASA-CSSA-SSSA International Annual Meeting, Cincinnati, OH, USA, October 21-24, 2012. (Abstract)
  • Lemke, R.L. (2012). "Longterm Crop Rotations.", 24th Annual Conference of the Saskatchewan Soil Conservation Association (SSCA), Saskatoon Inn, Saskatoon, SK, Canada, January 11, 2012.

2011

  • Baron, V.S., Lemke, R.L., Basarab, J.A., and Iwaasa, A.D. (2011). "Root, residue and removal-C and –N pools compared to above ground production for forage-based management practices.", 2011 ASA-CSSA-SSSA International Annual Meeting: Fundamental for life: soil, crop and environmental sciences, San Antonio, TX, USA, October 16-19, 2011, Abstract 67442. (Abstract)
  • Kröbel, R., Lemke, R.L., Campbell, C.A., Zentner, R.P., and Brandt, K. (2011). "Nitrogen and Phosphorus effect on water use- and nutrient use- efficiency in the Canadian semi-arid prairie.", Soils and Crops Workshop 2011, Prairieland Park, Saskatoon, SK, Canada, March 15-16, 2011, [CD-ROM]. (Workshop)
  • Lemke, R.L., Baron, V.S., Iwaasa, A.D., Farrell, R.E., and Schoenau, J.J. (2011 Internal). Quantifying nitrous oxide emissions resulting from animal manure on pasture, range and paddock by grazing cattle in Canada. Interim report prepared for Greenhouse Gas Division, Science and Technology Branch, Environment Canada., Agriculture and Agri-Food Canada (AAFC)/Agriculture et Agroalimentaire Canada (AAC). (Report)
  • Lemke, R.L., Iwaasa, A.D., Baron, V.S., Farrell, R.E., and Schoenau, J.J. (2011). "Quantifying nitrous oxide emissions resulting from beef cattle urine and dung on semiarid pasture.", 2011 ASA-CSSA-SSSA International Annual Meeting: Fundamental for life: soil, crop and environmental sciences, San Antonio, TX, USA, October 16-19, 2011.
  • Wang, H., He, Y., Qian, B., McConkey, B.G., Cutforth, H.W., McCaig, T.N., McLeod, G.J., Zentner, R.P., Campbell, C.A., DePauw, R.M., Lemke, R.L., Brandt, K., Liu, T.T., Qin, X., Hoogenboom, G., White, J., and Hunt, T. (2011). "Impact of Climate Change on Dual-Purpose Wheat Production in Western Canada.", World Renewable Energy Congress, Linköping, Sweden, May 8-13, 2011.

2010

  • Lemke, R.L., VandenBygaart, A.J., Campbell, C., and Lafond, G.P. (2010). "Long-term Effect of Crop Rotation and Fertilization on Soil C and N in a Thin Black Chernozem.", Soils and Crops Workshop 2010, University of Saskatchewan, Saskatoon, SK, Canada, February 24-25, 2010.

2009

  • Baron, V.S., Lemke, R.L., Young, D.G., Basarab, J.A., Naeth, M.A., and Iwaasa, A.D. (2009). "Pasture type and site effects on annual nitrous oxide emission rate.", 62nd Society for Range Management Annual Meeting, Albuquerque Convention Center, Albuquerque, NM, USA, February 8-12, 2009, Paper No. 100-4. (Abstract)
  • Baron, V.S., Lemke, R.L., Young, D.G., Basarab, J.A., and Iwaasa, A.D. (2009). "Nitrous oxide emission from old and new pastures.", 2009 ASA-CSSA-SSSA International Annual Meeting, Pittsburgh, PA, USA, November 1-5, 2009. (Abstract)
  • Lemke, R.L., Baron, V.S., Iwaasa, A.D., Farrell, R.E., and Schoneau, J.J. (2009 Internal). Quantifying nitrous oxide emissions resulting from animal manure on pasture, range and paddock by grazing cattle in Canada. Interim report for Environment Canada. (Report)
  • Malhi, S.S., Lemke, R.L., Liebig, M.A., McConkey, B.G., Schoenau, J.J., Cihacek, L.J., and Campbell, C.A. (2009). "Management Strategies/Practices for Increasing Storage of Organic C and N in Soil in Cropping Systems in the Northern Great Plains of North America.", Conference on Managing Climate Change (MC2), Massey University, Palmerston North, New Zealand, November 18-20, 2009, PA5b.
  • Malhi, S.S., Lemke, R.L., Schoenau, J.J., Wang, Y., and Leach, D. (2009). "Influence of Time and Method of Terminating Alfalfa Stands on Soil N Supply, Crop Yield, N Uptake, Soil Organic C and N, and Greenhouse Gas Emissions.", Conference on Managing Climate Change (MC2), Massey University, Palmerston North, New Zealand, November 18-20, 2009, PO2d. (Poster)
  • Malhi, S.S., Lemke, R.L., Wang, Z.-H., and Leach, D. (2009). "Influence of 8-Year Tillage, Crop Residue and N Fertilizer Management on Crop Yield, Soil Quality and Greenhouse Gas Emissions in Northeastern Saskatchewan.", Conference on Managing Climate Change (MC2), Massey University, Palmerston North, New Zealand, November 18-20, 2009, PO2c. (Poster)
  • Wang, H., Cutforth, H.W., McCaig, T.N., McLeod, D.G.R., Brandt, K., Lemke, R.L., Goddard, T.W., and Sprout, C. (2009). "Modeling Time of Seedling Emergence of Spring Wheat.", in Cao, W., White, J.W., and Wang, E. (eds.) - Crop Modeling and Decision Support, Tsinghua University Press, Beijing and Springer-Verlag Berlin Heidelberg, pp. 1-11.
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