Sowing a cover crop

[@sa7o]

I have now a grassy area. How should I prepare soil before sowing a cover crop (if till is a no-go
)? I was thinking about sheet mulching but the area is about 1 acre, so probably this is too much work.

[@SolCycleFarm]

I would till it a few times before sowing a cover crop. Sheet mulching an acre is not reasonable.