May 22 Quiz Jay Whetter May 22, 2014 Leave a Comment 1. Neil Harker, research scientist with AAFC in Lacombe, Alberta, says to provide “high yield protection” weed control should ideally occur before the ______ stage of the crop. 2 leaf3 leaf4 leaf5 leaf 2. Integrated weed management uses various methods to keep weeds below economically-damaging levels. Of the following four points, three are proven principles of integrated weed management. Which one is NOT?Higher seeding rateLate seeding dateShallow seeding depthNarrow row spacing 3. What is this weed? Redroot pigweedKochiaCanada thistleShepherd's purse Loading...