Abstract: A seeding apparatus comprising: (a seed distribution metering means including a rotating d drum with apertures on its periphery and a vacuum generator for generating a suction pressure inside the drum so that seeds are attracted to the apertures; (b) feeding system including a hopper, gravitational acceleration chamber, velocity controlling elements such as a flap and continuous belts for feeding seeds at a required amount and speed to the drum; (c) release mechanisms including an air-jet for releasing metered seeds from the drum along a selected trajectory while unselected seeds follow another trajectory, delivery device including an adjustable flow venturi and electronic sensor for controlling delivery of metered seeds.

Abstract: A seeding apparatus comprising: (a) seed distribution metering means including a rotating drum (1) with apertures on its periphery and a vacuum generator for generating a suction pressure inside the drum (1) so that seeds are attracted to the apertures; (b) feeding system including a hopper (31), gravitational acceleration chamber (47), velocity controlling elements such as a flap (38) and continuous belts (41) for feeding seeds at a required amount and speed to the drum (1); (c) release mechanisms including an airjet (19) for releasing metered seeds from the drum (1) along a selected trajectory (15) while unselected seeds follow another trajectory (16). (d) delivery means including an adjustable flow venturi (62) and electronic sensor (66) for controlling delivery of metered seeds.