In one aspect, an extractor assembly for an agricultural machine includes a deflector designed to cause air passing through external walls of the extractor assembly to intersect, which reduces the air flow velocity and improves the mixing of crop waste, resulting in a more uniform waste exhaustion and allowing better direction of said waste out of the agricultural machine. In one implementation, the deflector includes flat plate that defines a perimeter adapted to be coupled to an extractor hood of the extractor assembly. The deflector may also include a fixing plate and a fixing assembly.