Xueming Yang, Ph. D.

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

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.

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.

Cheng, S., Wang, L., Fang, H., Yu, G., Yang, X., Li, X., Si, G., Geng, J., He, S., Yu, G. (2016). Nonlinear responses of soil nitrous oxide emission to multi-level nitrogen enrichment in a temperate needle-broadleaved mixed forest in Northeast China. Catena, [online] 147 556-563. http://dx.doi.org/10.1016/j.catena.2016.08.010

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

Xueming Yang, Craig F. Drury, W. Dan Reynolds and Jingyi Yang. 2016. Winter-Hardy Legumes Provide Significant Amounts of N to the Corn in a Soy-Wheat-Corn System in Southern Ontario, Canada. American Society of Agronomy | Crop Science Society of America | Soil Science Society of America. Pheonix, AZ, 2016-11-08. https://scisoc.confex.com/scisoc/2016am/webprogram/Paper99624.html

Drury, C.F., Yang, X.M., Reynolds, W.D., Calder, W., Oloya, T., and A. Woodley. 2016. Impacts of nitrogen placement and inhibitors on ammonia volatilization, nitrous oxide emission and corn yields. ASA-CSSA-SSSA Annual Meeting, Phoenix, Arizona.

Woodley, A., Drury, C.F., Reynolds, W.D., Oloya, T.O., and C.S. Tan. 2016. Water and nitrate loss partitioning through surface runoff and tile drainage from a long-term (56 year) crop rotation study on a clay loam soil. ASA-CSSA-SSSA Annual Meeting, Phoenix, Arizona.

Drury, C.F., Yang, X.M., Reynolds, W.D., Calder, W., Oloya, T., and A. Woodley. 2016. Impacts of nitrogen placement and inhibitors on ammonia volatilization, nitrous oxide emission and corn yields. ASA-CSSA-SSSA Annual Meeting, Phoenix, Arizona.