A decade ago my friend studied traditional plant breeding at Helsinki university in Finland. They presented this same conclusion as a statistical fact. About five years ago I was studying a bit of biology and bumped into a lot of research drawing these same conclusions. As a further note, soil and water management which this article point as a way forward, are often affected negativly by GMO crops.
“According to Failure to Yield, a new report by the Union of Concerned Scientists, that promise has proven to be a mirage. Despite 20 years of research and 13 years of commercialization, genetic engineering has failed so far to significantly increase U.S. crop yields.”