1. Agriculture and Agri-Food Canada, 6000 C&E Trail, Lacombe, AB T4L 1W1, Canada
2. Semiarid Prairie Agricultural Research Centre, Agriculture and Agri-Food Canada, PO Box 1030, 1 Airport Road, Swift Current, SK S9H 3X2, Canada
3. Agriculture and Agri-Food Canada, PO Box 1240, 6 Highway South, Melfort, SK S0E 1A0, Canada
4. Research Farm—Indian Head, Agriculture and Agri-Food Canada, PO Box 760, 1 Government Road, Indian Head, SK S0G 2K0, Canada