Very sandy loam soil to plant haygraiser/pasture grass etc. will be spread from broadcast seeder.
Hay/grass seeds are very small; yes, a Cultipacker is your best tool to insure small seed germination after a light scuffing of soil in preparation, or maybe "slitting" soil shallowly with front and rear disc harrow gangs adjusted fore and aft, NOT set on an angle to throw dirt to the sides.
Larger seeds do better with deeper soil prep to support deeper root structures and planting at depth three times seed diameter { 1" +/- }, then covering with SOMETHING (four linked tires, disc harrow/shallow, drag harrow, rotary harrow, 6 X 6 timber wrapped in chain link fence ) and optionally Cultipacking if you have the time and energy.
Having written this, I have good luck with mixed size food plot seed, which I hand sow over disced ground, then Cultipack.
Like you, I have sandy soil. The Cultipacker presses soil around the seeds, eliminating air, retaining water.
Note mixed seed sizes in Photo №3. Soil is black because it is fill from a burn pile where I was filling in a small washout.
Cultipacker is from.....guess??????......Everything Attachments.
