posted 12 years ago
Some people seed buckwheat, usually in forage situations, for its ability to grow quickly. It also fixes nitrogen. I would suggest you look at the specific varieties open to you with an eye to the number of days to flower. This will give you an idea as to how mature the plants will be when you till it under, if your plan is to use the living mulch as cover and soil improvement before planting, or for that matter, if you are planning on tilling it in after they flower and the pollinators get at them.
I don't know where you're located, but the ultimate permie way to handle it (I can't as I'm in a city) is apparently, especially with former pasture, to seed it with a seed mix that includes mangel beets and daikon radishes among your clovers and buckwheats (and dandelions and kales and chard, you'll see where I'm headed) and run pigs over it when you're ready to till, a la Sepp Holzer. They will till everything pulling up the rooted veggie candy, allowing you to follow up something like 5-8 days after (depends on the hatching rate of the flies in your area) with chickens, who will clean up any seed, bugs, voles, mice, and worms too slow to escape them. Both animals fertilize with their passing (oh look, I made a funny). You could do this, if you either had your own, or borrow someones', depending on the community.
I think the important thing to consider is that if you don't seed right after you till, preferably with something that germinates and grows quicker than whatever you're trying to eliminate, you're just going to get the pioneer plants in the soil's seed bank taking up residence, including your bunch grass, in all likelihood.
Good luck.
-CK
A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects.
-Robert A. Heinlein