Cropping systems, agronomy, rotations, tillage, plant-soil interactions

Establishment of zone-till strips in the fall.

Research Interests:

The overall focus my research is on the development of economically and environmentally sustainable cropping systems, primarily for corn/soybean/cereal production systems predominant in Ontario. Current research projects include: 1) evaluation of reflectance as a crop based indicator for corn nitrogen requirement, 2) determination of sources of temporal and spatial variability in no-till and conventional tillage corn production systems, 3 ) zone tillage impacts on soil properties and corn response, 4) long-term effects of tillage system on soil quality and crop yield, 5) long-term effect of rotations on soil quality, 5) effect of intermittent tillage on soil quality and crop response in a corn/soybean/wheat rotation, and 6) maize response to soil properties. Another complimentary area of research is the development of mechanistic simulation modelling as a means to evaluate and interpret results from cropping system experiments.

For further information on Dr. Deen's research please visit:
http://www.plant.uoguelph.ca/research/agronomy/

Selected Publications:

Deen, W., T. Hunt and C. J. Swanton. (2001). A Mechanistic Growth and Development Model for Common Ragweed (Ambrosia artemisiifolia). Weed Science. 49:723-731.

Deen, W., T. Hunt and C. J. Swanton. (1998). Influence of temperature, photoperiod and irradiance on common ragweed (Ambrosia artemisiifolia) Development. Weed Science. 46:555-560.

Deen, W., T. Hunt and C. J. Swanton. (1998). Photothermal time describes common ragweed (Ambrosia artemisiifolia) phenological development and growth. Weed Science. 46:561-568.

Deen, W. and T. Hunt. Application of ICASA Data File Standards to A Long Term Cropping System Study. Book of Proceedings, European Society for Agronomy, 2nd International Symposium Modelling Cropping Systems. Florence, Italy. July 2001.