A harvesting apparatus having a frame to be advanced over an area in which a crop is grown and a harvesting assembly on the frame configured to process severed crop. The harvesting assembly is configured to advance severed crop laterally to a delivery location between the laterally spaced sides of the frame and to and through a feed housing. A fluid delivery system discharges pressurized fluid to at least one of: a) facilitate severance of crop; and b) facilitate rearward advancement of severed crop. The fluid delivery system has at least a first pressurized fluid source through which pressurized fluid is delivered to laterally spaced outlets. A cleaning assembly has a first cleaning conduit assembly for directing pressurized fluid from the first pressurized fluid supply source in at least a first stream that repositions unusable crop and debris to reduce buildup thereof in the vicinity of the feed housing.