The Soil Association has published a report on the latest available
research on GM crop yields over the last ten years. The yields of all
major GM crop varieties in cultivation are lower than, or at best,
equivalent to, yields from non-GM varieties. An April 2006 report from
the United States Department of Agriculture (USDA) states that
“currently available GM crops do not increase the yield potential of a
hybrid variety. Studies from 1999-2007 consistently show RR GM soya to
yield 4-12% lower than conventional varieties. Only maize shows a
persistent trend of yield increase into the biotech era, but even there
the rate of increase is no greater after than before biotech varieties
were introduced. Despite claims of increased yield, Bt cotton has had
no significant impact in real terms. In addition, recent research in
Sweden has confirmed that GM seeds can remain active in farmland for at
least 10-years, adding scientific support to the concern about the
impact on land values of growing GM crops.<br><i>Fonte di informazione:</i> <a href="http://www.soilassociation.org/" target="blank">www.soilassociation.org</a>, 19 aprile 2008.
Menu
Menu
