I use play sand in with the seed (turnips, Rape, Clover) so that I get good coverage. You can seed at a rate of 1.5# - 2.5# per acre if you are planting a pure plot. If you are over seeding an exsisting food plot I would use around 1#. Remember these are small seeds and a little goes a long way.

1/4" deep with good soil contact is needed. Compact the soil slightly prior to seeding and then lightly drag to cover.