Your fall plants can provide thatch for throw n mow/roll like buckwheat does. Lots of folks use cereal grains from the fall planting to be the thatch for the next year's planting. Buckwheat seems popular due to being easy to grow, fast to grow, easy to terminate, and low residue.
Where are you located? For us folks up north, it's easier because by the time winter cereals are maturing in the summer it's almost time to plant fall plots. Warmer climates likely have a bigger gap between cereals going to seed and ideal fall plot planting time but
@Crimson n' Camo seems to do fine in the south with his program still. Search his posts in the throw n mow sticky thread. There are many varieties of what you're searching for in that thread too.
Things to consider:
- Do you want your winter cereals to mature until seed is viable? Free viable seed is pretty cool but it also could make it harder for new seed to compete. If you dont want those competition issues you can terminate the annual winter cereal (rye/wheat/barley/triticale) before seed is viable via herbicide, crimping, mowing, or rolling. The other thing is that if seed is mowed as soon as it becomes viable, it may reseed earlier than ideal for peak deer palatability during hunting season. They like tender young cereals so they are reseeded in July and the deer dont keep them mowed down, they can get pretty stalky and undesirable to deer.
- If using perennials they can also outcompete your new crop if not terminated. See posts by
@Foggy47 and
@Wild Thing about perennial clover outcompeting new fall plantings. If you are happy to have perennial clover as your primary species this may not be an issue at all
I saw a sturgis video recently where he said he likes to terminate the cereals in the spring before they get too much biomass. Lots of folks on this site beg to differ about that being a problem if you do let them mature. To help keep your biology breaking down thatch, you'll want a fair bit of legumes mixed with cereals to fix nitrogen and help with the carbon:nitrogen ratio.