What is new about the Failure to Yield report?
This is the first report to analyze nearly two decades worth of peer-reviewed research on the yield of genetically engineered food/feed crops in the United States and to arrive at new yield values for those crops. The report reveals that only one major GE food/feed crop—Bt corn, a variety engineered with a gene from the bacterium Bacillus thuringiensis, which produces toxins to protect the plant from several insects—has achieved any significant yield increase in the United States. The 3–4 percent yield increase achieved by Bt corn over the 13 years that it has been grown commercially is much less than what has been achieved over that time by other methods, including conventional breeding. Over the past several decades, corn yields have increased about one percent per year, or about 14 percent (due to the compounding property of yield gain) over the 13 years since Bt was first commercialized. Therefore, by this rough calculation, Bt has contributed only 21–28 percent of yield gain in co
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