A tubular for processing crops can include a body having an outer surface and protrusions extending outwardly from the outer surface. The protrusions can be arranged in bands that are spaced apart along the outer surface to define gaps therebetween that form grooves extending around a circumference of the body. Each band of protrusions can be positioned offset with respect to at least one adjacent band of protrusions such that the protrusions form a spiraling configuration around a longitudinal axis of the body.