Don't have any yeild data for ya, but we put a half rate on every acre of soy's we did this year.   Am amazed at how well it worked.  We haven't used this product for maybe 6-7 years.

Maybe there is a yeild drag on corn, but I doubt it.  We use a heavy rate of Sonalan (another old yeller) on infront of Navies and our corn does very well the next year on navy ground.......It is warmer come planting time on this ground.

We plant Rup corn and soys (havent found rup navy seed yet), so were feelin a bit obligated to put pre's on.   Am glad we did this year as we havent been under the gun like past years.

Will let ya know in a couple harvests if our yeild goes down.