"stubble" - mowed I assume?
Fry it. Cook the daylights out of it. That's step 1. I've had some varying difficulty on some burn downs this year. As in, I wouldn't hold back on round-up and it's cheap per gallon (like $10-12 if buying bulk or find good deals). If it were ME.... I'd blast it with 4 qts round-up (heck, maybe more, only thing that hurts is pocket book) with Crop oil & ammonium sulfate added (oh, I forgot, if you have a sprayer with electric motor, must skip the Ammonium sulfate - don't want you frying the electric motor). I've got a "mad-scientist" stock of herbicides so I guess to be honest - I'd throw more at it if were me.... I'd do 4-5 qts round-up, Ammonium sulfate, crop oil, possibly 30 oz of Liberty (depending on weed type), 6-7 oz of Sonic & Prowl H2O. that's exact mix I did on one NASTY patch and I still had a few weeds slip through. Yes, that's a nuclear bomb BUT it also has residuals so I don't need to hit it again soon, 1 more spray possibly and I'm done.
So, all I'm saying is make sure it's deader than dead if possible. Same day, before or after, I'd be putting down 100-200 lbs pelletized lime. Not critical for PH but calcium helps beans. Not a "must do" but sure helps. I'd also add a combo of like 15-50-65 per acre (something like that) in fertilizer from coop BUT most of that won't be broke down this year so you're just kinda doing that for little help and the long haul. I'd also ask for innoculant for beans. Most guys skip it and one more thing BUT especially if hasn't been in beans for a while, it will help. You can get ALL this stuff at your local coop.
Drill ASAP. 1-2" deep, depending on moisture. Make sure big enough plot. If severe deer pressure, 250k seeds per acre and deer will thin em. SPRAY when weeds are small in plot.
So above is "complex" kinda but not really. If you want to make life simple.... Burn it down like crazy, drill asap and keep weeds controlled and that's as simple as a guy can make it.