1. Agriculture and Agri-Food Canada; Soils and Crops Research and Development Centre; 2560 Hochelaga Blvd. Québec QC Canada G1V 2J3
2. Agriculture and Agri-Food Canada; Dairy and Swine Research and Development Centre; P.O. Box 90, 2000, Road 108 East Lennoxville QC Canada J1M 1Z3
3. Institut de Recherche et de Développement en Agroenvironnement, Complexe Scientifique; 2700 Einstein Sainte-Foy QC Canada G1P 3W8