Dr. Dan Reynolds

Research Scientist

Conducts research on soil hydraulic properties, soil physical quality and soil health.

Current research and/or projects

Development of indicators and management practices that describe, maintain and improve the quality and health of agricultural soils in Canada.

Research and/or project statements

Identification of indicators of soil physical quality and health.

Determination of impacts of agricultural management practices on soil physical quality and health.

Development of methods for measuring and characterizing soil hydraulic properties.

Professional activities / interests

Member of Canadian Society of Soil Science

Member of Soil Science Society of America

Member of American Geophysical Union

Education and awards

B.Sc. (Hons.) Geology, University of Waterloo

M.Sc. Hydrogeology, University of Waterloo

Ph.D. Soil Physics, University of Guelph

Key publications

  1. Xueming Yang, Craig Drury, Mary-Anne Reeb, Dan Reynolds, “A Diversified Organic Cropping System: Impacts on Crop Production and Soil Health in S. Canada”. 3rd Global Soil Biodiversity Conference, poster presentation, March 12-16, 2023, Dublin, Ireland.

    2023 - View publication details

  2. Drury, C.F., Agomoh, I., Phillips, L., Reynolds, W.D. and X. Yang. 2022. Mitigation practices to reduce NH3 volatilization and N2O emissions from agricultural soils. Soil C and GHG Emissions Mitigation Modelling Workshop. November 4, 2021. Attendees:100.

    2021 - View publication details

  3. Yang, X.M., Drury, C.F., Reynolds, W.D., Phillips, L.A. (2020). Nitrogen release from shoots and roots of crimson clover, hairy vetch, and red clover. Canadian Journal of Soil Science, [online] 100(3), 179-188. http://dx.doi.org/10.1139/cjss-2019-0164

    2020 - View publication details

  4. Yang, X.M., Drury, C.F., Reynolds, W.D., Reeb, M.D. (2019). Legume cover crops provide nitrogen to corn during a three-year transition to organic cropping. Agronomy Journal, [online] 111(6), 3253-3264. http://dx.doi.org/10.2134/agronj2018.10.0652

    2019 - View publication details

  5. Reynolds, W.D. 2019. Improved drainage relationships for characterizing the agronomic and environmental performance of field crop production. Geoderma xxx: xxx-xxx.

    2019 - View publication details

  6. He, W., Smith, W.N., Grant, B.B., VanderZaag, A.C., Schwager, E.A., Qi, Z., Reynolds, D., Wagner-Riddle, C. (2019). Understanding the fertilizer management impacts on water and nitrogen dynamics for a corn silage tile-drained system in Canada. Journal of Environmental Quality, [online] 48(4), 1016-1028. http://dx.doi.org/10.2134/jeq2018.11.0414

    2019 - View publication details

  7. Xueming Yang et al. 2018. Legume cover crop: a satisfactory organic N source for grain corn in S Ontario. 17th World Fertilizer Congress, Shenyang, China, Sept 2-7, 2018.

    2018 - View publication details

  8. Woodley, A.L., Drury, C.F., Reynolds, W.D., Tan, C.S., Yang, X.M., Oloya, T.O. (2018). Long-term cropping effects on partitioning of water flow and nitrate loss between surface runoff and tile drainage. Journal of Environmental Quality, [online] 47(4), 820-829. http://dx.doi.org/10.2134/jeq2017.07.0292

    2018 - View publication details

  9. Xueming Yang, Craig Drury, Dan Reynolds, Jingyi Yang, Mary-Anne Reeb. Winter-hardy legumes: important non-fertilizer N sources for corn in soybean-wheat-corn rotation. 2018 Joint Meeting of the CGU-CSSS-CIG-CSAFM-ESSSA, June 10-14, 2018, Niagara Falls, ON.

    2018 - View publication details

  10. Guest, G., Smith, W., Grant, B., McConkey, B., Chipanshi, A., Reid, K., Kroebel, R., Martel, M., Desjardins, R., VanderZaag, A., Pattey, E., Glenn, A., Wilson, H., Balde, H., Wagner-Riddle, C., Drury, C.F., Fuller, K., Hayashi, M., Reynolds, D. (2018). Comparing the performance of the dndc, holos, and vsmb models for predicting the water partitioning of various crops and sites across Canada. Canadian Journal of Soil Science, [online] 98(2), 212-231. http://dx.doi.org/10.1139/cjss-2017-0112

    2018 - View publication details

  11. Woodley, A.L., Drury, C.F., Reynolds, W.D., Calder, W., Yang, X.M., Oloya, T.O. (2018). Improved acid trap methodology for determining ammonia volatilization in wind tunnel experiments. Canadian Journal of Soil Science, [online] 98(2), 193-199. http://dx.doi.org/10.1139/cjss-2017-0081

    2018 - View publication details

  12. 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. Canadian Journal of Soil Science, [online] 98(3), 484-499. http://dx.doi.org/10.1139/cjss-2018-0027

    2018 - View publication details

  13. Canadian Society of Soil Science Annual Meeting 2017 June 10 - June 14, 2017 | Peterborough, Ontario

    2017 - View publication details

  14. Soybean-winter_wheat-corn rotation is common for in humid s-Ontario. The objectives of this study were to determine: (1) how much nitrogen can be scavenged in legume cover crop; (2) what is the contribution of cover crop nitrogen to the yield of following corn. The cover crops were planted into the soil after winter wheat harvest, including Crimson clover (CC), hairy vetch (HV), red clover (RC), a non-cover crop conventional control (CKC) and a non-cover crop organic control (CKO). This study (2013-2016) was arranged in a randomized complete block design with 4 replicates on a sandy loam. No synthetic nitrogen fertilizer was added to the cover crop and CKO plots. One set of cover crop biomass samples were collected at the first killing-frost and another set was collected in following year before corn planting. At freeze-up, the amounts of total nitrogen in aboveground biomass were 126, 123, and 76 kg/ha, respectively, in CC, HV and RC treatments. The nitrogen contents in plant aboveground biomass changed to 104, 283 and 180 kg/ha in CC, HV, and RC plots before corn planting. The corn grain yields (3 year average) were 14525 kg/ha for the CKC and only 6181 kg/ha for the CKO. In comparison, the corn grain yields were 11762, 12765, and 12282 kg/ha for the CC, HV RC treatments, respectively. Without the use of synthetic N fertilizer, growing CC in the fallow seasons after winter wheat attained 81% of the corn grain yield of the CKC and growing HV and RC gained 88% and 86%, respectively, of the corn grain yield in the CKC achieved which received 160 kg N/ha. The CC, HV and RC can deliver significant amount of N to corn and the HV and RC performed better than the CC in term of N benefits to corn yield.

    2017 - View publication details

  15. Reynolds, W.D., Drury, C.F., Yang, X.M. and Phillips, L.A. 2017. On the description and determination of soil water field capacity. Oral Presentation to: Canadian Society of Soil Science, Annual Meetings, June 10-14, 2017, Trent University, Peterborough, Ontario, Canada

    2017 - View publication details

  16. Reynolds, W.D. (2017). Use of bimodal hydraulic property relationships to characterize soil physical quality. Geoderma, [online] 294 38-49. http://dx.doi.org/10.1016/j.geoderma.2017.01.035

    2017 - View publication details

  17. Fox, C.A., Miller, J.J., Joschko, M., Drury, C.F., Reynolds, W.D. (2017). Earthworm population dynamics as a consequence of long-term and recently imposed tillage in a clay loam soil. Canadian Journal of Soil Science, [online] 97(4), 561-579. http://dx.doi.org/10.1139/cjss-2016-0092

    2017 - View publication details

  18. Xueming Yang, Craig Drury, Dan Reynolds, Jingyi Yang, Mary-Anne Reeb. 2017. Winter-hardy legumes deliver significant amounts of N to organic corn on a sandy loam soil in southern Ontario. 2017 Guelph Organic Conference Guelph 2017/01/26 - 2017/01/29. http://guelphorganicconf.ca/wp-content/uploads/2016/11/GOC-Sat-Sun-brochure-schedule-2.pdf.

    2017 - View publication details

  19. Reynolds, W.D. 2017. Use of bimodal hydraulic property relationships to characterize soil physical quality. Geoderma 294, 38-49

    2016 - View publication details

  20. 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

Research facility

2585 County Road 20
Harrow, ON N0R 1G0


Membre de la Société canadienne de la science du sol

Membre de la Soil Science Society of America

Membre de l’American Geophysical Union