Seeding lawns or problem grass areas by hand often leads to undeveloped seeds that refuse to germinate. Grass seed must have constantly contact with moist, not saturated, soil to germinate. You can improve your seed to soil contact by Slit Seeding. A Slit seeder cuts thin grooves in your lawn with a rotating discs as it drops seed into the grooves from the seed box on the front of the machine. Slit Seeding your lawn is the single best way to ensure great seed to soil contact which in turn greatly improve your germination rate. This in conjunction with an aeration improves these results dramatically!