Harker, K. Neil, Ph.D.

Research Scientist, Weed Ecology & Crop Management

Contact Information:

6000 C and E Trail
Lacombe, Alberta T4L 1W1
Telephone: 403-782-8134
Fax: 403-782-6120
Email: neil.harker@agr.gc.ca

Areas of Expertise:

  • Environmentally sustainable integrated weed management systems;
  • Weed biology, competition and weed-crop interactions
  • Integrated crop management systems in barley, canola, peas, and wheat
  • Weed, insect, and disease interactions in agronomic systems
  • Herbicides

Current Projects:

  • Integrated Crop Management systems in Canola
  • Integrated Best Management practices for sustainable barley production
  • Agronomic, ecological and economic implications of GMO crops.
  • Agronomic systems for pulse crops
  • Improve utilization efficiency of inputs to obtain economic yields of high quality product, improve agroecosystem health, and mitigate climate change
  • Remove impediments to winter wheat production

Affiliations:

  • Adjunct Professor, University of Alberta, AFNS Dept.
  • Weed Science Society of America
  • Canadian Weed Science Society
  • Western Society of Weed Science

Research publications

2017

  • Harker KN, O’Donovan JT, Smith EG, Johnson EN, Peng G, Willenborg CJ, Gulden RH, Mohr RM, Gill KS, Weber JD and Issah G. 2017. Canola growth, production and quality are influenced by seed size and seeding rate. Canadian Journal of Plant Science. 97(3): 438 448.
  • O’Donovan JT, Izydorczyk MS, Tidemann BD, Edney MJ, Turkington TK, Grant CA, Harker KN, Gan Y. 2017. Effect of preceding crop and nitrogen application on malting barley quality. Canadian Journal of Plant Science 97:1014-1023

2016

2015

2014

2013

2012

2011

2010

2009

Other science related publications

2016

  • Harker KN, Tidemann BD, O'Donovan JT, Shirtliffe SJ, Willenborg C, Johnson EN, Michielsen L, Reid P. 2016. When Do Wild Oat Seeds Become Viable? Canadian Weed Science Society Annual Meeting, November 2016.

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)
  • Carcamo, H.A., Otani, J.K., Harker, K.N., Reid, P., Broatch, J.S., Meers, S., Barkley, S., and Daniel, S. (2015). "Of lygus and canola: where is the threshold?", Entomological Society of Alberta Annual General Meeting, Jasper, AB, Canada, October 1-3, 2015.
  • Chatterton, S., Carcamo, H.A., Thomas, J.B., Meers, S., Harding, M.W., Harker, K.N., Vandenberg, A., Shirtliffe, S.J., Bowness, R.T., Reid, P., Broatch, J.S., Barkley, S., Syrovy, A., Kaur, S., Brar, P., and Bruhjell, D. (2015). "Reducing necrotic spots on faba beans: lygus, chocolate spot or both?", West Forum Pest Management, Abottsford, BC, Canada, October 21-23, 2015.
  • Gan, Y.T., Harker, K.N., Kutcher, H.R., Gulden, R.H., Irvine, R.B., May, W.E., O'Donovan, J.T., and Yang, C. (2015). "Uniform plant stands enhance the synergy of pod formation and seed yield in canola.", 14th International Rapeseed Congress, Saskatoon, SK, Canada, July 5-9, 2015. (Poster)
  • Harker, K.N. (2015). "Canola weed management systems - mitigating weed resistance to herbicides.", 14th International Rapeseed Congress, Saskatoon, SK, Canada, July 5-9, 2015, Keynote theme oral presentation.
  • Harker, K.N., O'Donovan, J.T., Blackshaw, R.E., Johnson, E.N., Pageau, D., Shirtliffe, S.J., Gulden, R.H., Rowsell, J., Hall, L.M., and Willenborg, C.J. (2015). "Cultural techniques for integrated wild oat management.", Canadian Weed Science Society Meeting, Edmonton, AB, Canada, November 23-26, 2015, Oral presentation. (Abstract)
  • Harker, K.N., O'Donovan, J.T., Turkington, T.K., Blackshaw, R.E., Lupwayi, N.Z., Smith, E.G., Johnson, E.N., Kutcher, H.R., Willenborg, C.J., Gan, Y.T., Dosdall, L.M., Hall, L.M., Peng, G., Irvine, R.B., and Mohr, R.M. (2015). "Sustainable canola production increases with cropping system diversity.", 14th International Rapeseed Congress, Saskatoon, SK, Canada, July 5-9, 2015. (Poster)
  • Lay, C-Y., Bell, T., Hamel, C., Harker, K.N., Mohr, R.M., and St-Arnaud, M. (2015). "The effects of agricultural practices on the microbiome of the roots and rhizosphere of canola.", Canadian Society of Microbiologists Annual Conference, Regina, Saskatchewan, Canada, June 15-18, 2015. (Abstract)
  • Morrison, M.J., Blackshaw, R.E., O'Donovan, J.T., Harker, K.N., and Holzapfel, C.B. (2015). "Innovations underpinning yield improvements in the Canadian canola industry.", Crop Updates, Perth, Australia, February 24-25, 2015.
  • O'Donovan, J.T., Grant, C.A., Blackshaw, R.E., Harker, K.N., Johnson, E.N., Gan, Y.T., May, W.E., Turkington, T.K., Lupwayi, N.Z., Khakbazan, M., and Smith, E.G. (2015). "Legumes in rotation affect hybrid canola and malting barley.", 14th International Rapeseed Congress, Saskatoon, SK, Canada, July 5-9, 2015, Keynote Theme D oral presentation.
  • O'Donovan, J.T., Turkington, T.K., Harker, K.N., Oatway, L., Grant, C.A., Beres, B.L., Johnson, E.N., May, W.E., Izydorczyk, M.S., MacLeod, A., Anbessa, Y., and Vera, C.L. (2015). "Malting barley cultivar responses to increasing nitrogen rates in western Canada.", ASA-CSSA-SSSA International Annual Meeting: Synergy in Science. Partnering for Solutions, Minneapolis, MN, USA, November 15-18, 2015. (Poster)
  • Tidemann, B.D., Harker, K.N., and Hall, L.M. (2015). "The Potential for Harvest Weed Seed Control on the Canadian Prairies.", Western Society of Weed Science Annual Meeting, Portland, OR, USA, March 9-12, 2015, Oral presentation.
  • Turkington, T.K., O'Donovan, J.T., Harker, K.N., Xi, K., Blackshaw, R.E., Johnson, E.N., Peng, G., Kutcher, H.R., May, W.E., Lafond, G.P., Mohr, R.M., and Irvine, R.B. (2015). "The impact of fungicide and herbicide timing on foliar disease severity, and barley productivity and quality.", XVIII International Plant Protection Congress (IPPC), Free University Berlin, Henry Ford Building, Berlin, Germany, August 24-27, 2015, ID: P HERBI 7. (Poster)
  • Turkington, T.K., Xi, K., Harker, K.N., O'Donovan, J.T., Blackshaw, R.E., McAllister, T.A., and Lupwayi, N.Z. (2015). "The impact of barley variety rotation, mixtures, and intercropping on leaf disease and silage production.", Canadian Journal of Plant Pathology. (Abstract)
  • Turkington, T.K., Xi, K., Harker, K.N., O'Donovan, J.T., Blackshaw, R.E., McAllister, T.A., and Lupwayi, N.Z. (2015). "The impact of barley variety rotation, mixtures, and intercropping on leaf disease and silage production.", XVIII International Plant Protection Congress (IPPC), Free University Berlin, Henry Ford Building, Berlin, Germany, August 24-27, 2015.
  • Turkington, T.K., Xi, K., O'Donovan, J.T., Harker, K.N., Peng, G., Martin, R.C., Beres, B.L., May, W.E., and Mohr, R.M. (2015). "The impact of seed treatment, foliar fungicide timing, and plant growth regulator on leaf-disease severity and productivity of barley.", XVIII International Plant Protection Congress (IPPC), Free University Berlin, Henry Ford Building, Berlin, Germany, August 24-27, 2015, ID: P IPM 42. (Poster)
  • Turkington, T.K., Xi, K., Peng, G., Martin, R.A., Harker, K.N., O'Donovan, J.T., Beres, B.L., May, W.E., and Mohr, R.M. (2015). "The impact of seed treatment, foliar fungicide timing, and plant growth regulator on barley leaf disease severity and productivity.", Canadian Journal of Plant Pathology. (Abstract)

2014

  • Blackshaw, R.E., Harker, K.N., O'Donovan, J.T., Johnson, E.N., Gan, Y.T., and Peng, G. (2014). "How frequently can oilseed rape be grown in sustainable cropping systems.", 13th Congress of European Society of Agronomy, Debrecen, Hungary, August 25-29, 2014, Available online at http://www.esa2014.hu/news/post-conference-updates-8.html, pp. 331-332. (Poster)
  • Harker, K.N., O'Donovan, J.T., Turkington, T.K., Baron, V.S., Blackshaw, R.E., Hall, L.M., Johnson, E.N., Willenborg, C.J., Shirtliffe, S.J., Gulden, R.H., Kobler, J.F., and Pageau, D. (2014). "Delaying herbicide resistance with integrated wild oat (Avena fatua) management.", 2014 Weed Science Society of America (WSSA) and the Canadian Weed Science Society (CWSS) Annual Meeting, Vancouver, B.C., Canada, February 3-6, 2014. (Abstract)
  • Lupwayi, N.Z., Harker, K.N., Larney, F.J., Blackshaw, R.E., and O'Donovan, J.T. (2014). "Correlating soil microbial properties with crop yields in the Canadian prairies: two case studies.", Soil's Role in Restoring Ecosystem Services Conference, Sacramento, CA, USA, March 6-9, 2014. (Abstract)
  • O'Donovan, J.T., Blackshaw, R.E., Grant, C.A., Harker, K.N., Johnson, E.N., Gan, Y.T., Lafond, G.P., May, W.E., and Turkington, T.K. (2014). "Legume crops grown in rotation enhance canola and barley productivity in western Canada.", 13th Congress of European Society of Agronomy, Debrecen, Hungary, August 25-29, 2014, pp. 357-358.
  • O'Donovan, J.T., Edney, M.J., MacLeod, A., Turkington, T.K., Grant, C.A., Harker, K.N., Johnson, E.N., Lafond, G.P., May, W.E., Beres, B.L., Kabeta, Y., and Juskiw, P.E. (2014). "Response of new malting barley cultivars to increasing nitrogen rates in western Canada.", 13th Congress of European Society of Agronomy, Debrecen, Hungary, August 25-29, 2014, pp. 141-142. (Poster)
  • O'Donovan, J.T., Grant, C.A., Blackshaw, R.E., Harker, K.N., Johnson, E.N., Gan, Y.T., May, W.E., Lafond, G.P., Turkington, T.K., Lupwayi, N.Z., Khakbazan, M., and Smith, E.G. (2014). "Rotational Effects of Legumes and Non-Legumes on Hybrid Canola, and Malting Barley.", American Society of Agronomy Annual Meeting 2014, Long Beach, CA, USA, November 3-5, 2014.
  • O'Donovan, J.T., Harker, K.N., Turkington, T.K., Blackshaw, R.E., Beres, B.L., Clayton, G.W., Lafond, G.P., Lupwayi, N.Z., and Dosdall, L.M. (2014). "The role of agronomic research in meeting cropping system challenges in western Canada.", 2nd Canadian Wheat Symposium, Saskatoon, SK, Canada, June 8-11, 2014.
  • O'Donovan, J.T., Harker, K.N., Turkington, T.K., and Clayton, G.W. (2014). "Combining cultural practices with herbicides reduces wild oat seed in the soil seed bank and improves barley yield.", 2014 Weed Science Society of America (WSSA) and the Canadian Weed Science Society (CWSS) Annual Meeting, Vancouver, B.C., Canada, February 3-6, 2014. (Abstract)
  • Turkington, T.K., Xi, K., Harker, K.N., O'Donovan, J.T., Blackshaw, R.E., McAllister, T.A., and Lupwayi, N.Z. (2014). "The impact of barley variety monoculture, rotation and mixtures, and intercropping on leaf disease and silage production.", 1st International Workshop on Barley Leaf Diseases, SalsomaggioreTerme, Italy, June 3-6, 2014, pp. 73. (Abstract)
  • Turkington, T.K., Xi, K., Peng, G., Martin, R.A., Harker, K.N., and O'Donovan, J.T. (2014). "The impact of seed treatment, foliar fungicide, and variety resistance on barley leaf disease severity and productivity.", 1st International Workshop on Barley Leaf Diseases, SalsomaggioreTerme, Italy, June 3-6, 2014, Also in Canadian Journal of Plant Pathology (in press), pp. 18. (Abstract)
  • Turkington, T.K., Xi, K., Peng, G., O'Donovan, J.T., and Harker, K.N. (2014). "An update on malt barley research at Lacombe.", Rahr Malting Canada Annual Grower Meeting, Alix, Alberta, Canada, February 6, 2014. (Presentation)

2013

  • Brian L. Beres, Thomas Kelly Turkington, Randy Kutcher, Byron Irvine, Eric Johnson, John T. O'Donovan, Kenneth Neil Harker, Christopher B. Holzapfel, Ramona Mohr, Gary Peng and Dean Spaner. 2013. Winter Wheat Cropping System Response to Seed Treatments, Seed Size and Sowing Density. Proceedings of the Joint Annual Meeting of the Canadian Society of Agronomy and the American Societies of Agronomy, Crop Science and Soil Science. 3-6 November. Tampa, FL.
  • O'Donovan, J.T., Grant, C.A., Blackshaw, R.E., Harker, K.N., Turkington, T.K., Johnson, E.N., Lafond, G.P., May, W.E., Gan, Y.T., Edney, M., and Juskiw, P.E. (2013). "Effect of legume crops grown two years prior to barley on malting barley yield and quality.", ASA/CSSA/SSSA International annual meeting: Water, Food, Energy and Innovation for a Sustainable World, Tampa, Florida, USA, November 3-6, 2013.
  • O'Donovan, J.T., Harker, K.N., Turkington, T.K., Lafond, G.P., Lupwayi, N.Z., Blackshaw, R.E., Clayton, G.W., and Dosdall, L.M. (2013). "The Role of Agronomic Research in Meeting Current and Future Cropping System Challenges in Western Canada.", ASA/CSSA/SSSA International annual meeting: Water, Food, Energy and Innovation for a Sustainable World, Tampa, Florida, USA, November 3-6, 2013.
  • O'Donovan, J.T., Turkington, T.K., Edney, M., Juskiw, P.E., May, W.E., Grant, C.A., Smith, E.G., Harker, K.N., Johnson, E.N., Beres, B.L., Kadeta, Y., and Chapman, B. (2013). "Relative responses of malting barley varieties to increasing nitrogen rates.", 16th Australian Barley Technical Symposium, Melbourne, Australia, September 8-11, 2013, pp. 58.
  • O'Donovan, J.T., Turkington, T.K., Edney, M., Smith, E.G., Harker, K.N., Beres, B.L., Clayton, G.W., Brandt, S.A., Johnson, E.N., Lafond, G.P., May, W.E., Grant, C.A., McKenzie, R., Juskiw, P.E., Kadeta, Y., Stonehouse, K., and Chapman, B. (2013). "Varietal and agronomic impacts on malting barley yield and quality.", FarmTech 2013, Westin Hotel, Edmonton, AB, Canada, January 29-31, 2013.

2012

  • Beaudoin, N., Sansoulet, J.B., Pattey, E., Grant, C.A., Blackshaw, R.E., Harker, K.N., Johnson, E.N., O'Donovan, J.T., and Gervois, S. (2012). "Adaptation de STICS à la culture de canola au Canada à partir du module colza en vue de simuler les émissions de N2O par ModuloSTICS.", IXe Séminaire du modèle de culture STICS, Sainte-Montaine, France, October 16-19, 2012. (Poster)
  • Harker, K.N. and O'Donovan, J.T. (2012). "Canola after pulse crops.", Agronomy Update Conference 2012, Red Deer, AB, Canada, January 17-18, 2012, pp. 9.
  • Harker, K.N., Willenborg, C.J., Gulden, R.H., Shirtliffe, S.J., and Hall, L.M. (2012). "Harvest losses in canola.", 52nd Annual Meeting of the Weed Science Society of America (WSSA), Waikoloa, HI, USA, February 6-9, 2012.

2011

  • Beckie, H.J., Harker, K.N., Hall, L.M., Holm, F.A., and Gulden, R.H. (2011). "Risk Assessment of Glyphosate Resistance in Western Canada.", 51st Meeting Weed Science Society of America, Hilton Portland & Executive Tower Hotel, Portland, OR, USA, February 7-10, 2011, pp. 64. (Presentation)
  • Blackshaw, R.E., Hao, X., Clayton, G.W., Harker, K.N., O'Donovan, J.T., Johnson, E.N., and Vera, C.L. (2011). "Canola response to polymer-coated urea versus urea in a four-year zero-tillage cropping system on the Canadian prairies.", 13th International Rapeseed Congress, Prague, Czech Republic, June 5-9, 2011, pp. 61-64.
  • Blackshaw, R.E., Harker, K.N., and O'Donovan, J.T. (2011). "Polymer-coated urea compared with urea reduces N uptake by weeds.", Canadian Weed Science Society 65th Annual Meeting, Marriott Gateway on the Falls, Niagara Falls, ON, Canada, November 21-24, 2011, pp. 65. (Poster)
  • Grant, C.A., Zebarth, B.J., Malhi, S.S., Soon, Y.K., Selles, F., Lupwayi, N.Z., O'Donovan, J.T., Harker, K.N., and Clayton, G.W. (2011). "Changes in soil ammonium and nitrate concentration over the growing season in western Canada as affected by urea or controlled release urea application.", 12th International Symposium on Soil and Plant Analysis, Mediterranean Agronomic Institute of Chania, Crete, Greece, June 6-10, 2011.
  • Harker, K.N., Brandt, S.A., O'Donovan, J.T., Blackshaw, R.E., Johnson, E.N., and Kutcher, H.R. (2011). "The Impact of Two Years of Wild Oat Management After Four Years of Low Crop Inputs in Barley and Canola.", 51st Meeting Weed Science Society of America, Hilton Portland & Executive Tower Hotel, Portland, OR, USA, February 7-10, 2011, pp. 62. (Presentation)
  • Harker, K.N., Turkington, T.K., O'Donovan, J.T., Kutcher, H.R., and Johnson, E.N. (2011). "Barley Herbicide and Fungicide Tank-Mixtures?", Canadian Weed Science Society 65th Annual Meeting, Marriott Gateway on the Falls, Niagara Falls, ON, Canada, November 21-24, 2011, pp. 46. (Abstract)
  • Harker, K.N., Turkington, T.K., O'Donovan, J.T., Kutcher, H.R., and Johnson, E.N. (2011). "Barley Herbicide and Fungicide Tank-Mixtures?", Canadian Weed Science Society 65th Annual Meeting, Marriott Gateway on the Falls, Niagara Falls, ON, Canada, November 24, 2011. (Presentation)
  • O'Donovan, J.T., Blackshaw, R.E., Grant, C.A., Harker, K.N., Lafond, G.P., Johnson, E.N., Gan, Y.T., May, W.E., Turkington, T.K., and Lupwayi, N.Z. (2011). "Legume Crops to Improve Soil Fertility for Enhanced Canola Production.", 2011 ASA-CSSA-SSSA International Annual Meeting: Fundamental for life: soil, crop and environmental sciences, San Antonio, TX, USA, October 16-19, 2011. (Poster)
  • O'Donovan, J.T., Harker, K.N., and Blackshaw, R.E. (2011). "Implications of sub-economic threshold wild oat densities in a cereal/field pea rotation under no-till.", Canadian Weed Science Society 65th Annual Meeting, Marriott Gateway on the Falls, Niagara Falls, ON, Canada, November 21-24, 2011, pp. 46. (Abstract)
  • Turkington, T.K., Kutcher, H.R., Xi, K., Harker, K.N., O'Donovan, J.T., and Johnson, E.N. (2011). "The impact of fungicide and herbicide timing on barley leaf disease severity, weed management and crop productivity.", The Western Producer, 101(6), pp. S180. (Abstract)

2010

  • Blackshaw, R.E. and Harker, K.N. (2010). "Evolution of Effective and EconomicWeed Control.", in Lindwall, C.W. and Sonntag, B. (eds.) - Landscapes Transformed: The History of Conservation Tillage and Direct Seeding, Knowledge Impact in Society, Canada, Chapter 11, pp. 141-148.
  • Blackshaw, R.E., Brandt, S.A., Johnson, E.N., Harker, K.N., O'Donovan, J.T., Turkington, T.K., and Kutcher, H.R. (2010). "Which crop inputs have the greatest impact on canola yield?", 2010 ASA-CSSA-SSSA International Annual Meeting, Long Beach Convention Center, Long Beach, CA, USA, October 31-November 4, 2010. (Abstract)
  • Blackshaw, R.E., Harker, K.N., O'Donovan, J.T., Johnson, E.N., Kutcher, H.R., and Hao, X. (2010). "ESN effects on canola establishment, weed competition and canola yield in a four-year study.", 2010 ASA-CSSA-SSSA International Annual Meeting, Long Beach Convention Center, Long Beach, CA, USA, October 31-November 4, 2010.
  • Hao, X., Li, C.L., Blackshaw, R.E., Harker, K.N., O'Donovan, J.T., and Clayton, G.W. (2010). "Nitrous oxide emissions from canola fields with ESN fertilizer application.", 2010 ASA-CSSA-SSSA International Annual Meeting, Long Beach Convention Center, Long Beach, CA, USA, October 31-November 4, 2010.
  • Hao, X., Li, C.L., Blackshaw, R.E., Harker, K.N., O'Donovan, J.T., and Clayton, G.W. (2010). "Response of residual soil available N level to polymer-coated urea (ESN) application in a canola-barley cropping system.", 2010 ASA-CSSA-SSSA International Annual Meeting, Long Beach Convention Center, Long Beach, CA, USA, October 31-November 4, 2010.
  • Li, C.L., Hao, X., Blackshaw, R.E., Harker, K.N., O'Donovan, J.T., and Clayton, G.W. (2010). "Nitrous oxide emissions from an acid soil in response to polymer-coated urea application and herbicide management in a canola-barley cropping system.", 2010 Joint Conference of the Canadian Society of Soil Science (CSSS) and the Canadian Society of Agronomy (CSA): Transfers & Transformations: Our Evolving Biosphere, University of Saskatchewan, Saskatoon, SK, Canada, June 20-24, 2010, pp. 120.
  • Li, C.L., Hao, X., Harker, K.N., Blackshaw, R.E., Clayton, G.W., and O'Donovan, J.T. (2010). "Nitrous oxide emissions from a Black Chernozem soil in response to polymer-coated urea application and herbicide management in a canola-barley cropping system.", 47th Annual Alberta Soil Science Workshop, Lethbridge, AB, Canada, February 16-18, 2010, pp. 21. (Workshop)

2009

  • Beres, B.L., Clayton, G.W., Harker, K.N., Blackshaw, R.E., Graf, R.J., Shaw, C., and Stanford, G. (2009). "Class Warfare: Crop Productivity and Weed Competitiveness of Winter and Spring Cereal Classes.", Canadian Triticale Biorefinery Initiative (CTBI) Annual Network Meeting, Summerland, BC, Canada, June 17-19, 2009. (Poster)
  • Blackshaw, R.E. and Harker, K.N. (2009). "Feeding crops and not weeds with expensive fertilizer.", FarmTech 2009, Edmonton, AB, Canada, January 28-30, 2009, pp. 44-46.
  • Blackshaw, R.E. and Harker, K.N. (2009). "Overcoming weed concerns in conservation tillage systems.", Landscapes Transformed: The quiet triumph of Conservation Tillage and Direct Seeding, Saskatoon Inn, Saskatoon, SK, Canada, March 24-25, 2009, pp. 6.
  • Harker, K.N., Blackshaw, R.E., Beckie, H.J., and O'Donovan, J.T. (2009). "Weed invasions in western Canada cropping systems.", in Inderjit, S. (ed.) - Management of Invasive Weeds. Series: Invading Nature - Springer Series in Invasion Ecology, Vol. 5, Springer, pp. 151-156, Volume 5.
  • Harker, K.N., Brandt, S.A., Johnson, E.N., O'Donovan, J.T., Blackshaw, R.E., Turkington, T.K., and Kutcher, H.R. (2009). "Input reduction impacts on weeds and crops in barley (Hordeum vulgare) and canola (Brassica napus).", 49th Annual Meeting of the Weed Science Society of America (WSSA), Hilton in the Walt Disney World Resort, Orlando, FL, USA, February 9-13, 2009, Abstract #507, pp. 1. (Abstract)
  • Harker, K.N., Brandt, S.A., O'Donovan, J.T., Blackshaw, R.E., Johnson, E.N., Turkington, T.K., Kutcher, H.R., and Clayton, G.W. (2009). "Wild oat populations after four years in a low-input barley-canola rotation.", Canadian Weed Science Society 63rd Annual Meeting, Delta Prince Edward, Charlottetown, PEI, Canada, November 24-26, 2009.
  • Li, C.L., Hao, X., Clayton, G.W., Blackshaw, R.E., O'Donovan, J.T., and Harker, K.N. (2009). "Nitrous oxide emissions in response to polymer-coated urea fertilizer application and herbicide management in a canola-barley crop system.", Joint Annual Meeting of the CSA-CSSS-CSAFM: Sciences for Sustainability: Soils, Agronomy, and Atmosphere, University of Guelph, Guelph, ON, Canada, August 5-7, 2009, pp. 56-57.
  • O'Donovan, J.T., Harker, K.N., Blackshaw, R.E., and Stougaard, R.N. (2009). "Crop production impacts of below-label herbicide rates.", 49th Annual Meeting of the Weed Science Society of America (WSSA), Hilton in the Walt Disney World Resort, Orlando, FL, USA, February 9-13, 2009, Abstract #298, pp. 1. (Abstract)
  • Smith, E.G., Blackshaw, R.E., and Harker, K.N. (2009). "Early spring seeding canola more profitable and less risky.", Top Crop Manager (Western edition), 2009(February), pp. 24-25.
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