This kind of precision corn seeder/corn drill must match with the four-wheel types tractors, which used for seeding the single seed or double seeds accurately (you may chose). The corn drill also sow the crystalline granule fertilizer while seeding. which can finish furrowing, fertilizing, seeding, covering earth, pressing etc, the effect of Single grain sowingis extremely accurate, that is save seeds , truly achieve a revolutionary innovation in planting industry.