1. Agriculture and Agri-Food Canada, Soils and Crops Research and Development Centre; 2560 Hochelaga Boulevard Québec QC Canada G1V 2J3
2. Department of Soils and Agri-Food Engineering; Université Laval; Québec QC Canada G1K 7P4
3. Agriculture and Agri-Food Canada, Semiarid Prairie Agricultural Research Centre; P.O. Box 1030 Swift Current SK Canada S9H 3X2