peas are definitely an option.... works pretty well with a heavy rate of Heat in burnoff to hold back mustard for while. I always find on that rotation that the Canada thistle gets pretty wild in the peas after an oilseed, definitely will want to do a fall burnoff this year.
spring cereals are fine too as long as you add a little extra fert to keep the proteins up.
as to corn i would not know. not sure if you used any granulars like edge or trifluralin in the mustard. the label doesn't say much about recropping corn.
I wonder if the mustard would even germinate by the time the peas would be seeded, peas get slammed in pretty early.
I am liking this pea thing more and more.
Could make some choices as it comes with herbicide options.
I've done a little experimenting with thistrol this year on Canada thistle (labeled for peas) and it's working quite well. I was curious if it would kill mustard so I sprayed a small patch of canadians in it and it dinged it but definitely didn't do much harm.
Could use raptor if it is not out out of hand but thick enough for concern or go to Basagran if it gets crazy and I want to bail out.
Seeing how well mustard controls grass on it's own (its actually pretty crazy) I have some fear it would have a lasting effect that might bother the corn.
Kinda like planting wheat or corn after sunflowers, they just can't hack what ever it is that sunflowers leave behind.
Most people think it's the water consumption witch has some play in it but sunflowers definitely have a mechanism to them that suppresses grasses.