A granular product delivery arrangement and method for an agricultural product applicator utilize a granular product deflector disposed below an inflow slot in a substantially horizontally extending supply line for enhancing entrainment of the granular product in an air stream passing through the supply line. The deflector has a body configured for enhancing entrainment of the granular product dropped through the slot into the flow of pressurized air passing through the supply line by directing the granular product toward an inner wall of the supply line adjacent the inflow slot, and directing the air stream away from the inflow slot in a manner that maintains a substantially unobstructed path for the airstream through a central area of the supply line and provides multiple zones within the supply line for the granular product to be entrained into the air stream.