A spray head arrangement (12) for use in an agricultural sprayer including a spray boom carrying a plurality of said spray head arrangements is described. The spray head arrangement comprising: a manifold body (14) defining a fluid chamber (106) including a bottom section having a substantially planar top surface region (104) containing a plurality of flow control openings (128, 130, 132, 134, 136, 138, 140) having inlets arranged in a circular ring-shaped zone extending about an upright axis； a plurality of nozzles (32, 34, 36, 38) respectively having inlets coupled for receiving fluid from said plurality of flow control openings (128, 130, 132, 134, 136, 138, 140)； a nozzle selector disk (48) being located in said chamber (106) and having a flat bottom surface engaged with said planar top surface region (104) of said bottom section, said nozzle selector disk (48) being mounted for rotation about said axis and containing at least one nozzle selection opening (142, 144, 146, 148, 149, 150, 151, 152) located for selectively registering with said flow control openings (128, 130, 132, 134, 136, 138, 140) as said disk (48) is rotated in said chamber (106)； and a power-operated motor being connected for rotating said nozzle selector disk (48).
