if a graph shows that "Initial weed interference of 4 to 6 weeks followed by weed removal will have little/small impact on yield" which one of these answers also corresponds? 1. yield reduction is low when weeds are allowed to compete for 4 to 6 weeks 2. weeds allowed to compete for 10 to 12 weeks will cause a low degree of yield loss 3. yield reduction is high for weeds allowed to compete for 4 to 6 weeks 4. The best time to implement a control strategy is at week 12 5. Yield loss is greatest 6 to 8 weeks