Almost everyone on the coast has shallow well pumps for irrigation. When I install a well, a 40-60 pressure switch is used. All you have to do is to increase your cut off pressure higher (usually a few turns). Or as mentioned increase your outflow on the rotors or add another rotor. Set your timer to about a 5 minute delay between zones to let the motor windings cool.
We all are merely gleaners from the masters who were here before us.