As I understand the allelopathy process, allelopathy is due to a chemical given off by the established crop.  Is that your understanding? Are we on the same page here?

"we've had good weed control results in plots we used to have with rye vs no rye. Those were no-till 30" non gmo soy's. Pre merge chem's were the same across the plots, but there were 2 post sprays required as a rule w/o rye, 1 with. We ran plots for a few years set up this way, and the results were similar each year regardless of weather conditions."

You still haven't proven to me that this is allelopathy - i.e. a chemical reaction in the soil - and not some other factor, as I mentioned in my previous post - e.g. ground cover reducing sunlight hitting the soil, lower soil temp, etc, etc, etc.