Science Edition 2014—Key practice: Control weeds early through a combination of pre-seed weed control and one in-crop application before the four-leaf stage. Key research: Harker, K. Neil, Agriculture and Agri-Food Canada (AAFC), et al. “Field-Scale Time of Weed Removal in Canola.” Weed Technology (2008). Harker, K. Neil, AAFC, et al. “Seeding Rate, Herbicide Timing and Competitive Hybrids...