A new research from Canada shows that Bt maize produces similar or up to 12% lower yields than non-Bt maize. The study, by B.L. Ma and K.D. Subedi also found that non-Bt maize showed higher nitrogen uptake. Some of the Bt hybrids took 2-3 additional days to reach maturity. The Bt maize had 3-5% higher grain moisture at maturity.</p><p><a href="http://www.gefreemaine.org/article.php?story=20050818150125790&mode=print">Abstract</a></p><p><a href="http://www.saveourseeds.org/downloads/Btmaize_inferior_yield.pdf">Full Report (pdf)</a>