David B. McKenzie, Ph.D.

Research Scientist

Research Scientist, agronomy, crop physiology

204 Brookfield Road, BLDG 5 St. John's, NL

Current research and/or projects

Development of accelerated half-high blueberry crop establishment techniques
Improving nutrient balances on dairy farms using model farmlets and simulation
Development of true potato seed production systems suitable for northern environments

Research and/or project statements

Amana Jemal Kedir, David Bruce McKenzie, Noura Ziadi, Adrian Unc. Comparison of agri-environmental phosphorus tests for boreal agricultural and natural Podzols. CJSS 2 September 2022 https://doi.org/10.1139/cjss-2022-0037

Kedir AJ, Nyiraneza J, Hawboldt KA, McKenzie DB and Unc A (2022). Phosphorus Sorption Capacity and Its Relationships With Soil Properties Under Podzolic Soils of Atlantic Canada. Front. Soil Sci. 2:931266. https://doi.org/10.3389/fsoil.2022.931266

Unc A, Altdorff D, Abakumov E, Adl S, Baldursson S, Bechtold M, Cattani DJ, Firbank LG, Grand S, Guðjónsdóttir M, Kallenbach C, Kedir AJ, Li P, McKenzie DB, Misra D, Nagano H, Neher DA, Niemi J, Oelbermann M, Overgård Lehmann J, Parsons D, Quideau S, Sharkhuu A, Smreczak B, Sorvali J, Vallotton JD, Whalen JK, Young EH, Zhang M and Borchard N (2021) Expansion of Agriculture in Northern Cold-Climate Regions: A Cross-Sectoral Perspective on Opportunities and Challenges. Front. Sustain. Food Syst. 5:663448. https://doi.org/10.3389/fsufs.2021.663448

Jeyakumar LGK, McKenzie DB, Zhang Y, Galagedara L, Bittman S, Hunt D. Modeling Tile Drainage Outflow in Thin Agricultural Soils with Impermeable under Layer in Newfoundland and Labrador, Canada. Adv Environ Eng Res 2021;2(2):21; https://doi.org/10.21926/aeer.2102016

Jeyakumar LGK, McKenzie DB, Christianson LE, Derdall E. Initial Validation of a Replicated Field-scale Denitrifying Bioreactor Facility in a Boreal Environment. Adv Environ Eng Res 2021;2(2):19; https://doi:10.21926/aeer.2102005

Kedir, AJ, Nyiraneza, J, Galagedara, L, Cheema, M, Hawboldt, KA, McKenzie, DB,Unc, A. 2021. Phosphorus adsorption characteristics in forested and managed podzolic soils. Soil Science Society of America Journal. Soil Sci Soc Am J. 2021; 1– 14. https://doi.org/10.1002/saj2.20180

Education and awards

Education

1984: Ph.D., Soil Science, Texas A&M University, College Station, Texas

1980: M.Sc., Soil Science, University of Manitoba, Winnipeg, Manitoba

1977: B.S.A., Agriculture, University of Manitoba, Winnipeg, Manitoba

Awards

1997: Agcellence Award, the highest Agriculture & Agri-Food Canada departmental award, for exceptional accomplishments

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

Key publications

Cordeiro, M.R.C., Rotz, A., Kroebel, R., Beauchemin, K.A., Hunt, D., Bittman, S., Koenig, K.M., McKenzie, D.B. (2019). Prospects of forage production in northern regions under climate and land-use changes: A case-study of a dairy farm in Newfoundland, Canada. Agronomy, [online] 9(1), http://dx.doi.org/10.3390/agronomy9010031
2019 - View publication details
Kumar, J.L.G., McKenzie, D.B. and Jewell, L.E. 2018. Can Wood Chip Bioreactors Reduce Nitrates in Tile Drainage? 60th Annual Farm Field day, St. John’s Research and Development Centre, St. John’s, NL, Canada September 15, 2018. Presentation (Poster)
2018 - View publication details
Valdez, V., A. Ramasami, V. Kavanagh, D. Burton, L. Jewell, D. McKenzie, A. Unc. 2018. Nitrogen cycling genes in a long-term land-use converted boreal land in Newfoundland, Canada. https://meeting2018.cgu-ugc.ca/ Abstract p.433 of 542pp. 2018 Joint Meeting of the Canadian Geophysical Union (CGU), Canadian Soil Science Society (CSSS), Computational Infrastructure in Geodynamics (CIG), Eastern Section of the Seismological Society of America (ES-SSA) and the Canadian Society for Agricultural and Forest Meteorology (CSAFM). June 10-14, 2018 Niagara Falls, Canada. (oral presentation).
2018 - View publication details
DB McKenzie, PL Dixon, C. Noronha and KN Hobrecker. 2017. Buckwheat (Fagopyrum esculentum Moench.) seeding date and cultivar response to Newfoundland growing conditions. Annual Meeting, the Canadian Phytopathological Society, 2017/
Réunion annuelle, la Société Canadienne de Phytopathologie, 2017, Canadian Journal of Plant
Pathology, 39:4, 540-586, DOI: 10.1080/07060661.2017.1386378
https://doi.org/10.1080/07060661.2017.1386378
2017 - View publication details
McKenzie, D.B., L.E. Jewell, and L.G. Jeyakumar. 2017. Wood chip bioreactors reduce water nitrates levels. Agriview 11 (3): 9-10. http://www.nlfa.ca/newsletter
2017 - View publication details
Jeyakumar, L., McKenzie, D.B., Molloy, W., Bittman, S., Hunt, D., Galagedara, L., Derdall, E. 2017. Simulating subsurface tile drainage water outflow using DRAINMOD in Atlantic Canada. Joint Annual Meeting of American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, 22-25 Oct, Tampa, FL. Presentation abstract 201-13. https://scisoc.confex.com/crops/2017am/webprogram/Paper108588.html
2017 - View publication details
Jeyakumar, L; McKenzie, DB; Jewell, LE; Porter, E. 2017. Denitrifying Bacterial Community in a Wood chip Bio filter Treating Water Outflow from Tile-Drained Agricultural Fields. The 59th Annual Farm Field day, St. John’s Research and Development Centre, 12 Aug, St. John’s, NL
2017 - View publication details
McKenzie, DB; Jeyakumar, JLG; Jewell, LE; Hobrecker, K; Murphy, P; Comeau, S; Barron, J; Doody, T; Eissa, R; Valdez, V; Fiadjoe, A (2017). Nitrate Removal in Field-Scale Wood Chip Bioreactors. The 59th Annual Farm Field day, St. John’s Research and Development Centre, 12 Aug, St. John’s, NL
2017 - View publication details
Jewell, LE; Jeyakumar, L; Wiseman, D; McKenzie, DB; Porter, E (2017). Wood Chip Wonders! The 59th Annual Farm Field day, St. John’s Research and Development Centre, 12 Aug St. John’s, NL
2017 - View publication details
McKenzie, D.B., *Jeyakumar, L., Murphy, P., Bittman, S., Hobrecker, K., Derdall, E. 2017. Design of wood chip denitrification bioreactors treating nitrate-N from agricultural drainage. ASABE Annual International Meeting, 16-19 Jul, Spokane, WA. Presentation abstract 1700637.
2017 - View publication details
Jeyakumar, L., McKenzie, D.B., Murphy, P., Bittman, S., Wiseman, D., Derdall, E. 2017. Performance evaluation of four field-scale denitrification wood chip bioreactors treating agricultural tile drainage water in a cold climate. ASABE Annual International Meeting, 16-19 Jul, Spokane, WA. Presentation abstract 1700628.
2017 - View publication details
Jeyakumar, L*; Galagedara, L; McKenzie, DB; Bishop, G. 2016. Modeling agricultural tile drainage water outflow under cool climate conditions. Joint Annual Meeting of American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, Phoenix, USA. Presentation abstract 110-8. https://scisoc.confex.com/scisoc/2016am/webprogram/Paper101638.html
2016 - View publication details
Bittman, S., Hunt, D., Koenig, K., Duynisveld, J., Mckenzie, D., Kroebel, R., and Haak, D. "Semi-Virtual Model Farmlets to Study Nutrients in Livestock Farms: Proposed Dairy System Case Study. 2016. ASA-CSSA-SSSA International Annual Meeting 2016-Phoenix, AZ, Nov. 6-9.
2016 - View publication details
Jeyakumar, L*; McKenzie, DB; Smith, E; Derdall, E; Zhang, H; Unc, A; Galagedara, L; Todd, S; Bishop, G. 2016. Overview of Development of Novel Woodchip Bioreactor System to Reduce Pollution Effects of Agricultural Tile Drainage Water, 3rd Biennial Agriculture Research Symposium, St. John’s, Canada. poster
2016 - View publication details
Jeyakumar, L*; McKenzie, DB; Derdall, Bishop, G. 2016. Treatment of Agricultural Tile Drainage Water in a Pilot-Scale Woodchip Bioreactor System. 3rd Biennial Agriculture Research Symposium, St. John’s, Canada.
2016 - View publication details
Debnath, S.C., McKenzie, B.D., Bishop, G.A., Dixon, P., Siow, Y.L. and Simms, D. (2016). “Production and improvement of small fruit crops native to Newfoundland and Labrador.”, Symposium Program Book, 3rd Biennial Symposium: Our Food, Our Future – Research that Feeds Newfoundland and Labrador, November 02-03, 2016, St. John’s, NL, Canada; p. 13 (http://www.ourfoodourfuture.ca/agenda).
2016 - View publication details
McKenzie, D.B., Debnath, S.C., Dixon, P.L., Bishop, G.A. Impact of surface mulch type on new plantings of half-high blueberry cultivars. Symposium Program Book, 3rd Biennial Symposium: Our Food, Our Future – Research that Feeds Newfoundland and Labrador, November 02-03, 2016, St. John’s, NL, Canada; p. 29-30, poster 6. (http://www.ourfoodourfuture.ca/agenda)
2016 - View publication details
D.B. McKenzie*, S.C. Debnath, P.L. Dixon, and G.A. Bishop. 2016. Flower occurrence in a 2012 planting of four half-high blueberry cultivars in eastern Newfoundland as affected by surface mulch type. 58th Annual Farm Field day St. John's Research and Development Centre St. John's 2016/08/13. Poster
2016 - View publication details
McKenzie, DB*; Jeyakumar, L; Derdall, E; Bishop, G. 2016. Optimizing nitrate removal in woodchip beds treating agricultural tile-drained water. The 58th Annual Farm Field day, St. John’s Research and Development Centre, St. John’s, NL, Canada. Poster
2016 - View publication details
Debnath, S.C., McKenzie, B.D., Bishop, G.A., Dixon P., Mills A., Anderson S. and Siow, Y.L. (2016). “Innovative technologies to accelerate industry transition from “wild” to cultivated cool climate small fruit crop production systems.”, Abstract Book, Joint Annual Conference for the Canadian Society of Agronomy and the Canadian Society for Horticultural Science, July 24-26, 2016, Montreal, QC, Canada; p. 25 (https://www.regonline.ca/builder/site/tab3.aspx?EventID=1812036).
2016 - View publication details