Residual weed killer might be a problem.
Thinking of the residuals, I looked up the label for metazachlor. You could drill beans in the spring following an autumn application of Shadow (metazachlor + quinmerac + dimethanamid-p) which covers the heavier duty residuals used in osr. Kerb/Crawler is approved in beans at certain timings so I don't see major issues with this.