June/July 2005 5 of the sensors rely on the ability of the soil to conduct electricity and the
correlation of this conductivity with soil moisture. At the time this project was initiated, the four
commercially available controllers were selected for testing. All four sensors are still being
tested with three watering frequencies–one, two, and seven days per week between the
hours of 4 pm and 10 am The one and two days per week watering frequencies represent
typical watering frequencies when watering restrictions are imposed in Florida. The …