Despite widespread, but I’d say gradually changing, thinking to the contrary, researchers at the University of Michigan believe that organic farming can produce three times the yield of pesticide-based farming operations.
In a release [plus podcast] on July 10, U of M Natural Resources and Environment Professor Ivette Perfecto talked about her research that found that in developed countries, yields were nearly equal on organic and conventional farms. But in developing countries, the results were more 
dramatic, with food production doubling or tripling with organic methods.
“My hope is that we can finally put a nail in the coffin of the idea that you can’t produce enough food through organic agriculture,” Perfecto says.
According to this article in Planet Ark, Perfecto and her colleagues reviewed 293 studies on organic farming yields.
A Virtual Farmgirl thanks to eMagazine.com for the tip about the UofM findings.
Virtual Farmgirl 