Question 43

According to the National Agricultural Aviation Society (NAAS), without the use of crop protection products to control insects, weeds, and diseases, crop yields per acre will drop by more than 50 percent. The first aerial application of insecticide occurred in 1921, and it was a huge success. By contrast, in today’s economy all aircraft that are classified as aerial applicators do more than just apply insecticide; today, they also spread sees and apply fertilizer.
From the information given above it CANNOT be validly concluded that

Solution

In the given passage, it is given that according to NAAS, without the use of crop protection products to control insects, weeds, and diseases, crop yields per acre will drop by more than 50 percent. i.e. If the crop protection products are not used, then the crop yields will fall by more than 50 percent. However, we cannot be sure about its reverse. Hence, we can eliminate Option A. Option D is in line with this. 


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