Dr. Dan Reynolds

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

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

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

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

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

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.

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

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.

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