You need to get accurate flow measurements at higher pressures. If your existing well and pump setup won't exceed 50 psi because of a pressure-switch setting, it is customary to raise the cutoff pressure to above 60 psi. (the air charge in the pressure tank also gets increased at the same time the cutoff setting is raised)
You also need to explain what, if any, restrictions you might be dealing with. I rarely see restrictions on well watering, outside of a major drought situation.