A soil moisture sensor was developed using a capacitive measurement method to help manage irrigation efficiently. By analyzing the soil's electrical properties, the sensor can determine moisture content. The study found that as soil moisture increases, the soil's electrical voltage also increases by 70-80%. Different types of soil have varying dielectric properties, with higher moisture content leading to higher capacitance. The sensor's performance is stable within a specific frequency range. This research can benefit fields like hydrology, agriculture, and weather forecasting.