Impact heads are overhead sprinklers that have a spring-loaded arm to break up the water stream.
Wobbler-type heads are overhead sprinklers that spin around quickly because of the water pressure.
Spray-type sprinklers are placed just above the soil/substrate surface and direct water into a pattern
onto the soil/substrate surface.
Drip sprinklers are placed on or just above the soil/substrate surface and drip water out of emitters at
defined intervals (for example every 6 inches or 2 feet).