A forced-air system for conveying a produce within a mechanized harvester of a row crop. The mechanized harvester includes a straddling over-carriage having a central channel for receiving a row of bushes or vines containing the produce to be harvested, and especially for blue berries. The harvester has a harvesting beater, including a spool with rotating rods, mounted within the central channel of the mechanized harvester. The forced-air system can employ offset harvesting beaters and a flexible air supply diffuser, to precisely direct the fan or blower-generated airstream, to direct the harvested fruits or produce to interior catch pans and conveyors within the harvester, and to help remove the produce from the bushes or vines.