Go to goole and type in" living mulch", "cover crop", or something along those lines and you will find TONS of info about any type of seed on there. Ironicaly most of the seeds we as hunters use are the same thing people have used for years to improve soil. Ecspecially the clovers and alfalfa sededs develop fast root systems that reach deep into the soil and will actualy aeriate the ground deeply when thier roots rot away.

Good luck