Dan Reynolds, Ph.D.

Chercheur scientifique

Effectuer des recherches sur les propriétés hydrauliques, la qualité physique et la santé des sols.

Recherche et / ou projets en cours

Élaboration d’indicateurs et de pratiques de gestion pour décrire, maintenir et améliorer la qualité et la santé des sols agricoles au Canada.

Énoncés de recherches/projets

Détermination des indicateurs de la qualité physique et de la santé des sols.

Détermination des répercussions des pratiques de gestion agricole sur la qualité physique et la santé des sols.

Élaboration de méthodes pour mesurer et caractériser les propriétés hydrauliques des sols.

Activités professionnelles / intérêts

Qualité physique des sols

Propriétés hydrauliques des sols

Prix et études

B. Sc. (avec distinction) en géologie, Université de Waterloo

M. Sc. en hydrogéologie, Université de Waterloo

Ph. D. en physique des sols, Université de Guelph

Principales publications

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

    2017 - Consulter les détails de la publication

  2. 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 - Consulter les détails de la publication

  3. Second Global Soil Biodiversity Conference Nanjing 2017/10/15 - 2017/10/19

    2016 - Consulter les détails de la publication

  4. Zhang, B., Drury, C.F., Yang, X.M., Reynolds, W.D., et Zhang, X. (2014). « Crop rotation, red clover and cropping history influences microbial amino sugars of a clay loam soil. », Soil Science Society of America Journal, 78(3), p. 818-824. doi : 10.2136/sssaj2013.03.0098

    2014 - Consulter les détails de la publication

  5. Si, B.C., Reynolds, W.D., et Kachanoski, R.G. (2008). « Analysis of Soil Variability. », dans Carter, M.R. and Gregorich, E.G. (dir.) - Soil Sampling and Methods of Analysis. 2nd Edition, CRC Press Taylor & Francis, Boca Raton, FL, USA, Chapitre 85.

    2008 - Consulter les détails de la publication

Installation de recherche

2585, chemin de comté no 20 Est
Harrow, ON N0R 1G0
Canada

Affiliations

Membre de la Société canadienne de la science du sol

Membre de la Soil Science Society of America

Membre de l’American Geophysical Union

Language

Anglais