Throw-and-mow workflow: spray the existing vegetation with glyphosate 2 weeks before planting, broadcast seed by hand, then mow over to crimp the dead vegetation onto the seed for soil contact. Works for clover, cereal grains, and small-seeded brassicas.
For larger plots or heavier soils, a small tow-behind disc and broadcast spreader behind an ATV scales up. Crop calendars have planting windows; variety reviews on the farm side cover hand-broadcast-friendly cultivars.